Keithley 706 Service manual

Model

706

Scanner

Instruction Manual

Contains Operating and Servicing Information

Publication Date: April 1991
Document Number: 706-901-01 Rev. E

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of
shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries,
diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will
be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs
will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the origi­nal warranty period, or at least 90 (lays.

LIMITATION OF WARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or misuse of
any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or
problems arising from normal wear or failure to follow instructions.

‘ITHIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTlE S, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE
BUYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT, INDI­RECT, SPECIAL, INCIDENTAL QR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND
SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF
SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL

AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.

Keithley Instruments, Inc. l 28775 Aurora Road l Cleveland, OH 44139 l 216-248-0400 l Fax: [phone] l http://www.keithley.com

CHINA:
FRANCE
GERMANY:
GREAT BRITAIN:
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JAPAN:
NETHERLANDS:
SWITZERLAND:
TAIWAN

Keitbley Instruments Cl&m. Yuan Chen Xio Building, Room 705 l No. 12Yomin Road, Dewei, Madian. Beijing, China loo029 l 8610-2022886 l Fax: [phone]
Keitbley Instruments SAkL l BP 60.3 al& des Garays -91122 Palaiseau C&&x l 31-6-0115155. Fax: [phone]
Keitbley Instruments GnibH l Laodsberger Stralk 65 l 82110 Germering l 49-89-849307-o l Fax: [phone]
Keitbley Instruments, Lt& l The Minster l 58 Portman Road l Reading, Berkshire RG30 IEA 9 44-01734-575666 *Fax: [phone]

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Keithley Instruments Sk* Kriesbachstrasse 4 l 8600 Diibendorf* 41-1-8219444 l Fax: 41-l-8203081
Keitbley Instruments Taiwan l 1, Ming-Yu First SUeet * Hsinchu, Taiwan, R.0.C * 886-35-778462 l Fax: [phone]

Model 706 Scanner

Instruction Manual

01983, Keithley Instruments, inc.

Test Instrumentation Group

All rights reserved.

Cleveland, Ohio, U.S.A.

Fifth Printing, April 1991

Document Number: 706-901-01 Rev. E

SPECIFICATIONS

GENERAL

DISPLAY: Seven 0.5” LED digits with decimal point, function and

IEEE status annunciators.

INTERNAL CLOCK: Displays hours/minutes/seconds or date/

month; less than 1 minute/month error (typical).

BATTERY BACKUP: Rechargeable 3.6V nickel-cadmium. I month

retention of data with unit turned off.

OPERATING ENVIRONMENT: O” to 50°C, 0% to 80% relative

humidity up to 35OC.
STORAGE ENVIRONMENT: -25OC to 65OC.
CONNECTORS; Four BNC (lTL compatible): External Trigger,

Alarm Out/Serial-In, Channel Ready, Serial Out.
CAPACITY: Ten plug-in cards per mainframe.
EXPANSION CAPACITY: Daisy chain allows up to 4 SLAVE units

with I MASTER unit.
SWITCHING RATE: 100 channels/second (IOmsl, programmable

to 1 channel/l6 minutes (999.999s).
RELAY DRIVE: 4A minimum.
POWER: 90-125V or 195250V (internally selected), 50Hz to 400H2,

75V.A maximum.
DIMENSIONS, WEIGHT: 178mm high x 438mm wide x 448mm

deep (7” x 17 l/4” x 17 3/8”). Net weight 8.6kg (19 Ibs).

ACCESSORIES AVAILABLE:

Model 7008-3: IEEE-488 Cable, 0.9m (3 ft.)

Model 70086: IEEE-488 Cable, 1.8m (6 ft.)

Model 7010: IEEE-488 Adapter for Model 85 Computer.

Model 7024-I: Triaxial Cable, 0.3m (I ft.)

Model 7024-3: Triaxial Cable, 0.9m (3 ft.)

Model 7024IO:Triaxial Cable, 3.0m (IO ft.1

Model 7051-2: BNC to BNC Cable, 0.6m (2 ft.)

Model 7051-5: BNC to BNC Cable, 1.5m (5 ft.)

Model 7052: 4 x 5 Matrix Card

Model 7053: High Current Scanner Card

Model 7054: High Voltage Scanner Card

Model 7056: General Purpose Scanner Card

Model 7057A: Thermocouple Scanner Card

Model 7058: Low Current Scanner Card

Model 7059: Low Voltage Scanner Card

Model 7061: Universal Interface Card

Model 7068: Fixed Rack Mounting Kit for 706

Model 7069: Slide Rack Mounting Kit for 706

IEEE-488 BUS IMPLEMENTATION:

Multiline Commands: DCL, LLO, SDC, GET, GTL, UNT, UNL,

SPE, SPD.
Uniline Commands: IFC, REN, EOI, SRQ, ATN.
Interface Functions: SHI, AHI, T6, TM, L4, LEO, SRI, RLI, PPO,

DCI, DTI, CO, El.
Programmable Parameters: Display Mode, Output Format, EOI,

SRQ, Fir&Last, Open, Close, Display Channel, Alternate Output,

Pole Mode, Date Format, Save/Recall, Reset, I/O Port, Time,

Date, Settle Time, Interval Time, Alarm Time, Program Mode,

Trigger Mode, Terminator, Self Test.
Digital I/O Port: A separate edge connector consisting of eight

input and eight output lines as well as common and + R/DC. Out-

puts will drive one lTL load. Inputs represent one lTL load.

Mating connector supplied.

FRONT PANEL PROGRAMS

0

- Digital I/O

I* - Date Format

2* - Settle Time

3* - IEEE Address

4* - Save Setup

5* - Recall Setup
6* - Poles

- Alarm Time

7
8 - Self Test

Stand Alone

go* ­91, - Master
92* - Slave

93 - Inspect

- Clear

94

- Reset

99

*Battery backed up.

Read or change state on digital I/O port.
Changes date display between MM.DD

and DD.MM.
Time to output CHANNEL READY pulse
after closing relay.
Set bus address; not programmable from

bus.
Stores present relay setup in buffers l-75.
Recalls relay setup in buffers l-75.

1, 2, or Qpole configuration for scanning

(I-pole requires 7056). O-pole for matrix
card.
Set time for Alarm output pulse; repeats
daily.
Check RAM, ROM, LEDs.
Single 706 configuration.

Daisy Chain configuration.

Daisy Chain configuration.

Display closed relays only.
Clear buffer location.

Reset battery backup parameters to fac­tory values.

Speclfi+lons subject to change without notice.

Safety Precautions

The following safety precautions should be observed before using
this product and any associated instrumentation. Although some in­struments and accessories would normally be used with non-haz­ardous voltages, there are situations where hazardous conditions
may be present.

This product is intended for use by qualified personnel who recog-

nize shock hazards and are familiar with the safety precautions re-

quired to avoid possible injury. Read the operating information

carefully before using the product.

Exercise extreme caution when a shock hazard is present. Lethal
voltage may be present on cable connector jacks or test fixtures.

The American National Standards Institute (ANSI) states that a

shock hazard exists when voltage levels greater than 30V RMS,

42.4V peak, or 60VDC are present.

pect that hazardous voltage is present in any unknown circuit
before measuring.

Before operating an instrument, make sure the line cord is connect­ed to a properly grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks
before each use.

For maximum safety, do not touch the product, test cables, or any

other instruments while power is applied to the circuit under test.

ALWAYS remove power from the entire test system and discharge

any capacitors before: connecting or disconnecting cables or jump-

ers, installing or removing switching cards, or making internal

changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the

common side of the circuit under test or power line (earth) ground.

Always make measurements with dry hands while standing on a

dry, insulated surface capable of withstanding the voltage being

measured.

A good safety practice is to ex-

Do not exceed the maximum signal levels of the instruments and
accessories, as defined in the specifications and operating informa­tion, and as shown on the instrument or test fixture panels, or
switching card.

Do not connect switching cards directly to unlimited power circuits.
They are intended to be used with impedance limited sources.
NEVER connect switching cards directly to AC main. When con­necting sources to switching cards, install protective devices to lim­it fault current and voltage to the card.

When fuses are used in a product, replace with same type and rating

for continued protection against fire hazard.

Chassis connections must only be used as shield connections for
measuring circuits, NOT as safety earth ground connections.

If you are using a test fixture, keep the lid closed while power is ap­plied to the device under test. Safe operation requires the use of a
lid interlock.

Ifa @
#18 AWG or larger wire.

The
or more may be present on the terminals.
ual for detailed operating information.

Instrumentation and accessories should not be connected to hu-

mans.

Maintenance should be performed by qualified service personnel.
Before performing any maintenance; disconnect the line cord and
all test cables.

screw is present, connect it to safety earth ground using

symbol on an instrument or accessory indicates that 1OOOV

t

Refer to the product man-

TABLE OF CONTENTS

Paragraph

SECTION l-GENERAL INFORMATION

1.1

1.2

1.3

1.4
E

1:7

1.8

1.9

;-:
2:2.1

2.2.2

2.3
z.2

2:5.1

2.5.2

2.5.3

2.5.4

2.6
E

2:9

2.9.1

2.9.2

2.9.3

2.9.4

2.9.5

2.9.6

2.9.7

2.9.8

2.9.9

2.9.10

2.9.11

2.9.12

2.9.13

2.9.14

2.9.15

Introduction
Model 706 Features

Warranty information.

Manual Addenda

Safety Symbols and Terms

Unpacking and Inspection

Specifications.............................................;.-

Optional Accessories

Repackingforshipment
SECTION 2-OPERATION

Introduction

PreparationforUse

PowerUp .....................................................................................

Environmental Condition
Operatinglnstructions

Front Panel Clock Operation

Detailed Front Panel Controls Description

DetailedRearPanelDescription

Front Panel Programs.

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CorrectLineVoltage
Plug-In Card (Scanner) Installation

FrontPanelControls
Rear Panel Description.
Basic Front Panel Operation
ScanningExamples

Program 0 Digital I/O
Program 1 Data Format
Program 2 Relay Settle Time
Program 3 Set IEEE Primary Address
Program 4 Save Relay Set Up
Program 5 Recall Relay Set Up
Program 6 Pole Configuration, Matrix Mode
Program 7 Set Alarm Time
Program 8 Diagnostic Self Test.
Program 90 Stand Alone

Program 91 Master.

Program92Slave

Program 93 Inspect
Program 94 Clear
Program 99 Reset

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Title

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Page

l-l
l-l
l-l
l-l
l-l
l-l
l-l
l-2
1-3

2-1
2-l
2-l

2-2
2-3
2-3
2-3
2-3
2-7
2-8

2-17
2-18
2-19
2-19
2-20

2-20
2-21

2-24
2-25

2-25
2-26
2-26
2-27
2-28

3.1

3.1.1

3.1.2

3.1.3

3.1.4

3.2

3.2.1

3.2.2

3.2.3

3.3

SECTION 3-IEEE BUS OPERATION
Introduction

Software Consideration

HP-85BASlCStatements
Interface Function Codes.
Mode 706 Interface Commands

IEEE488 Bus Lines

Bus Management Lines
Handshake Lines
Data Lines

System Set Up Procedure

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3-l
3-l

3-2
3-3
3-3

ifi

3-4

i

;*i 1
31412

3.4.3

3.5

3.5.1

3.5.2

3.5.3

3.5.4

3.5.5

3.5.6

3.5.7

3.58

3.6

3.7

3.8

3.9

3.9.1

3.9.2

3.9.3

3.10

Bus Commands

Uniline Commands
Universal Commands
Addressed Commands

Device-Dependent Commands

DisplayMode
Program(Scan)Mode..
Prefix..
EOI(EndorIdentify)
BusResponseMode(SRQ)

TriggerModes

Programmable Terminator (Y)

Inputs....................................................-.

StatusByteFomat
Status Word (U)
Front Panel Programs
FrontPanelErrorMessages

IDDCError

No Remote Error.

IDDCOError
ScanningProgram

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;1;

331:
3-14
3-15
3-16

3-18

3-19
3-27
3-28
3-29
3-29
3-29

3-29
3-29
3-29

4.1

4.2

4.3
f.2

5.1

5.2

5.3

5.4

5.5

5.5.1

5.5.2

5.5.3

5.5.4

5.5.5

5.5.6

5.6

5.7

6.1

6.2

6.3

6.4

6.5

SECTION 4-THEORY OF OPERATION
Introduction
PowerSupply
Microcomputer
DisplayCircuit
IEEE-488lnterfaceCircuitry

SECTION 5-MAINTENANCE

Introduction ...................................................................................

FuseReplacement
LineVoltageSelection

Disassembly ...................................................................................

Troubleshooting

RecommendedTestEquipment

DigitalSelfTest
PowerSupplyChecks
DigitalCircuitryChecks

Display Boards Check
InterconnectBoardChecks

BatteryCharge
Special Handling of Static Sensistive Devices

SECTION 6-REPLACEABLE PARTS
Introduction
Pa&List
Orderinglnformation..
Factory Service.
Component Location Drawings and Schematic Diagrams

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4-1
4-l
4-l
4-3
4-3

5-l
5-l
5-1
5-3
5-6
5-6
5-6
5-7
5-7
5-7

z
5-8

6-l
6-l
6-l
6-l
6-1

LIST OF FIGURES

.‘.

Title

..

lI. .~.._‘.... _.

................................... 6-17/6-18

................................... 6-21/6-22

Figure

1-I

Model706Scanner
Scanner Card Installation

;::

FrontPanelControl ..................................................................

Model706RearPanel

;:“4

Daisy Chain Configuration
Model7052MatrixScheme

2-5

Matrix Display Clarification

;:y

BusStructure
3-2
3-3

$2

HandshakeSequence ................................................................

ContactAssi
TypicalBus
Digital I/O Port Pin Assignment

UandGModeSequence

3-6

StatusByte Format

g;:

Status Word Format

IEEE Display Error Messages

3-9

Model706BlockDiagram

4-1

Model706MemoryMap

2::

Topand BottomCoverRemoval ........................................................

PowerSup IyExplodedView

2::

Model706

Display Board, Component Location Drawing, Dwg. No. 706-l 10

6-l

Digital I/O Board, Component Location Drawmg, Dwg. No. 706-170

6-2

Mother Board, Component Location Drawing, Dwg. No. 706-I 10

6-3

Interconnect Board, Component Location Drawing, Dwg. No. 706-I 60

6-4

Display Board, Schematic Diagram, Dwg. No. 705-l 16

6-5

Digital I/O Board, Schematic Diagram, Dwg. No. 706-176

6-6

Mother Board, Schematic Diagram, Dwg. No. 706-I 06

6-7

Interconnect Board, Schematic Diagram, Dwg. No. 706-l 66

6-8

8 onnector ...............................................................

L1-

opView

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.. I ..

Page

1-o
;:$I

22;7
2-23
2-24

;:;
3-5

3-5
3-24
3-27
3-28
3-28
3-29

z

5-2

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........................... 6-I 1/6-l 2

....................... 6-l 5/6-i 6

................................. 6-19/6-20

............................... 6-25/6-26

5-4

5-5

6-9

LIST OF TABLES

Table

LineVoltageSetting

2-1
2-2 Slot Number/Channel Number Assignment
2-3 Power Up Default Conditions (Front Panel Operation)
2-4 Front Panel Controls
2-5 Rear Panel Description

2-6 StepScanExample ..................................................................

2-7 SingleScanExample

2-8 ContinuousScanExample
2-9 Required Equipment for Daisy Chain Example
2-10 Daisy Chain Example
2-11 Temperature Scan Example
2-12 Low Current Scan Example
2-13 SettingtheTime
2-14 SettingtheDate
2-l 5 Maximum Relay Drive Current from Mainframe
2-l 6 CANCEL Function Example
2-17 Summary of Front Panel Programs
2-l 8 Scanner Card Pole Configuration
2-19 Matrix Unit Number Display Assignment

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Title

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Page

2-1

2-l

g:;
2-7

;:g

2-10
2-l 0
2-l 1

12-12

2-13
2-l 3
2-14
2-15
2-16
2-19
2-22
2-24

Iii

LIST OF TABLES (CONT.)

2-20 Matrix Card Number Display Assignment
2-21 Program 99 Reset Condition
3-l HP-85 IEEE-488 BASIC Statements
3-2 Model 706 Interface Function Codes
3-3 IEEECommand Groups
34 IEEE Bus Connector Contact Designations
3-5 Power Up, DCL and SDC Default Conditions
3-6 Device-Dependent Commands Not Available to the Front Panel
3-7 Model 706 Device-Dependent Commands
3-8 Hierarchy of Command Execution
3-9 SRQ Commands and Conditions
3-10 Digital I/O Port Contact Pin Assignments
5-l Fuse Replacement 3AG Size.
5-2 Fuse Replacement 5mm Size
5-3 Line Voltage Selection.

54 RecommendedTestEquipment .....................................................................

5-5 PowerSupplyChecks

5-6 DigitalCircuitn/Checks ............................................................................

5-7 DisplayBoardChecks .............................................................................

5-8 InterconnectBoardChecks

5-9 Model 706 Static Sensitive Devices

6-l Model 706 Recommended Spare Parts List.
6-2 Index of Model 706 Schematics and Component Layouts.
6-3 Display Board Parts List

6-4 Mother Board Parts List

6-5 Digital I/O Board Parts List

6-6 Interconnect Board Parts List

6-7 Model 706 Mechanical Parts List

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2-24
2-29

3-2
3-3
3-3
3-5
3-6

3-9
3-10
3-12
3-16

3-24

5-l

5-l
5-l
5-6

5-6

5-7

5-7
5-8

5-8

6-l

6-l

6-3

6-5

6-6

6-7

Iv

1-O

Figure l-l. Model 706 Scanner

SECTION 1

GENERAL INFORMATION

1.1 INTRODUCTION
The Model 706 is an IEEE488 bus compatible scanner that

can accommodate ten plug-in scanner cards. With ten scan­ner cards installed up to 100 2-pole channels can be on the
same IEEE address. Using four additional Model 706s in a
daisy chain configuration up to 500 2-pole channels can be
on the same IEEE address. The Model 706 scanner adheres to

standard IEEE488 interface bus protocol. This enables the

Model 706 to be incorporated into any measurement that
uses programmed control through the IEEE-488 bus.

The front panel controls are clearly marked and easy to use.
These controls serve several functions such as opening a
selected channel, closing the channel, scanning between a
selectable first and last channel, selecting scan rate and
mode. There are 15 internal programs that are accessible
from the front panel. The programs can select primary ad­dress, settling time, store a relay set up, recall the stored relay
set up, control the digital I/O port, switch from International
to American date format, start or stop a scan sequence,
select 1, 2 or 4-pole measurement modes and program the

Model 706 as a master, slave or stand alone instrument in a
daisy chain configuration. The Model 706 may also be
operated in a matrix configuration.

The time and date are kept internally with a battery backed up
clock allowing time dependent procedures to be performed.

1.2 MODEL 706 FEATURES

The Model 766 scanner includes the following features:
.lJp to 100 2-pole channels.

aIEEE-488 bus operation.
*Selectable scan rate of IOmsec to 999.999sec.
aSelectable scan modes that enable the user to scan the first

channel to the last channel once, continuously or manually.

*Fifteen internal programs that are accessible from the front

panel.

aModel 706 mainframe can accomodate 10 scanner plug-in

cards.

*Several different plug-in scanner cards are available as op-

tions. They include: a general purpose relay card, a ther­mocouple card, low voltage card, low current card, high

current card, high voltage card, matrix card and universal in­terface card.

*Time and date are kept with a battery backed up clock.
*Digital I/O port with eight lines as inputs and eight lines as

outputs.

*External trigger input that accepts a greater than wet

negative going TTL compatible pulse for triggering the
Model 706 into a scan sequence.

@Channel ready output that outputs a greater than IOFec

negative going lTL compatible pulse upon the completion

of the programmed channel settling time.

*Alarm output that outputs a negative going lTL level

greater than 10,usec pulse when the programmed time is
reached.

1.3 WARRANTY INFORMATION
Warranty information is provided on the inside front cover of

this manual. If there is a need to exercise the warranty, con­tact your Keithley representative in your area to determine the
proper action to be taken. Keithley maintains complete repair
and calibration facilities in the United States, West Germany,
Great Britain, France, the Netherlands, Switzerland and
Austria. Information may be directed to the applications
engineer at any of the above locations. Check the inside front
cover of this manual for addresses.

1.4 MANUAL ADDENDA
Improvements or changes to this manual will be explained on

an addendum included with this manual.

1.5 SAFETY SYMBOLS AND TERMS

Safety symbols used in this manual are as follows:
The symbol ’

should refer to the operating instructions.
The symbol AM

voltage may be present on the terminals.
The, WARNING used in this manual explains dangers that

could result in personal injury or death.
The CAUTION used in this manual explains hazards that

could damage the instrument.

1.6 UNPACKING AND INSPECTION

The Model 706 is inspected both electrically and mechanically

before shipment. Upon receiving the Model 706, unpack all

items from the shipping container and check for any obvious
damage that may have occurred during transit. Report any
damage to the shipping agent. Retain and use the original

packaging materials if reshipment is necessary. The following

items are shipped with all Model 706 orders:

*Model 706 Scanner
*Model 706 Instruction Manual

*Optional accessories per request. (Cards are shipped

separately. 1

1.7 SPECIFICATIONS
For Model 706 detailed specifications, refer to the specifica-

tions that precede this section.

on the instrument denotes that the user

Q

on the instrument denotes that high

1-l

+

1.8 OPTIONAL ACCESSORIES

Switching Cards - Keithley offers over 20 different models of
switching cards. In addition to general purpose scanning and
matrix applications, cards are designed for special applications
with signal handling capabilities that include:

l

Low voltage switching to 20nV.

l

Low current switching to 1 OfA.

l

High frequency switching to 500MHz.

o Thermocouple switching with a precision temperature refer-

ence.

l

High voltage switching to 1 OOOV.

Further details on switching cards can be obtained by contact-

ing a Keithley representative or sales office.

Model 7008-3 IEEE-488 Cable-The Model 7008-3 is a 1 me­ter (3 feet) IEEE-488 cable. The cable has 24 stranded wire
conductors and is terminated on each end with IEEE-488 stan­dard connectors.

Model 7008-6 IEEE-488 Cable-The Model 7008-6 is a 2 me­ter (6 feet) IEEE-488 cable. The cable has 24 stranded wire
conductors and is terminated on each end with IEEE-488 stan­dard connectors.

Model 7010 Cable Adapter-The Model 7010 is an IEEE-488
cable adapter. The adapter extends the IEEE-488 connector by
one connector width.

Model 7051-2 1 The Model 7051-2 is a (2 feet) BNC to BNC
cable. It is especially useful for daisy chain operation.

Model 7051-5 - The Model 7051-5 is a (5 feet) BNC to BNC

cable. It is especially useful daisy chain configuration.

Model 7068 Fixed Rack Mount-The Model 7068 is a fixed or
stationary rack mounting kit that mounts the Model 706 in a
standard 19 inch rack. The dimensions are 13-3/4 inches deep

x 7 inches high (350mm x 178mm).

Model 7069 Slide Rack Mount with Handles - The Model
7069 is a sliding rack mount kit. It enables one Model 706 to be

rack mounted with the added feature of sliding the instrument
for easy access. The dimensions are 3-3/4 inches deep x 7
inches high (95mm x 178mm).

1.9 REPACKING FOR SHIPMENT

The Model 706 should be packed in its original carton. Before
packing, wrap the instrument in plastic. After it is placed in the
box, surround the instrument with Styrofoam packaging mate­rial. Remove all cards and ship separate.

If the Model 706 is to be returned to Keithley Instruments for

calibration or repair, include the following:

l

Write ATTENTION REPAIR DEPARTMENT on the address
label.

= Include the warranty status of the instrument.

l

Photocopy and complete the service form at the back of this
manual and return it with the instrument.

1-2

+

SECTION 2

OPERATION

2.1 INTRODUCTION
Operation of the Model 706 is divided into two sections: front

panel operation and IEEE-488 bus operation. IEEE bus opera-

tion is located in Section 3. This section contains the follow-

ing information:
*Preparation for use

@Power Up
iEnvironmental Conditions
*Front and Rear Panels Description
@Examples of Scanning
aFront Panel Programs

2.2 PREPARATION FOR USE

2.2.1 Correct Line Voltage
Connect the Model 706 to the proper power receptacle (refer

to Table 2-l). For fuse replacement or line voltage setting
refer to Section 5 Maintenance.

WARNING
Ground the instrument through a properly
earth grounded receptacle before opera­tion. Failure to ground the instrument can
result in severe injury or death in the event
of a short circuit or malfunction.

1. To install a scanner card, slide the card into the appropriate
vertical slot. The slots are numbered 1 through 10. Refer to
Table 2-2 for slot number/ channel numbers assignment.
Facing the rear panel of the Model 706, the scanner card
component side should face the left side of the slot. Make
certain the card edges are aligned with the top and bottom
grooves in the slot.

2. Once the card is aligned with the grooves, insert the card
to its full depth into the Model 706. Make certain the card
is properly seated into the connector on the interconnect
board. When the card is fully inserted, the locking tabs on

the card should be placed in the locked position as shown

in Figure 2-1.

3. To remove a scanner card, first turn the Model 706 off and
disconnect the line cord. Unfasten the locking tabs by pull­ing both tabs outward. Grasp the end of the card and pull it

out of the mainframe.

NOTE
Handle the scanner cards by the edges to avoid
contaminating them with dirt, body oil, etc.

WARNING
Do not insert scanner cards that have metal
clamps into the Model 706. Otherwise a

shock hazard will be present. Only use
scanner cards that have plastic clamps.

2.2.2 Plug-In Card (Scanner) Installation
Before operating the Model 706, the appropriate scanner

cards must be installed into the mainframe. Each scanner

card (up to 10 cards per the Model 706 mainframejis installed
in-the appropriate vertical slot in the rear panel of the Model

706. Refer to Figure 2-l for an overall picture of scanner card

installation.

WARNING
To prevent a possible shock hazard, turn
the instrument off and disconnect the line
cord before installing/removing any scan­ner card.

Table 2-l. Line Voltage Setting

Input Jumper I Line Fuse

Voltage

9OV-125v Installed

195v-250v

Setting 3AG

Not
Installed

Table 2-2. Slot Number Channel Number Assignment

Slot

Number

1
2
3
4
5

7”
ii

10

“Does not include other units in a daisy cha;

configuration see paragraph 2.5.4 example 4.

FlOl .

5mm

1.25A, 1.25A, installed
250V 250V

0.6A, 0.6A, not
250V 250V installed

Varistor

Channels

Included

l-10

11-20
2130
31-40
41-50
51-60
61-70
71-60
81-90

91-100

VR2

2-l

LOCKING TABS

MODEL706 /

REAR PANEL

SCANNER CARD

INSTALLATION

Figure 2-l. Scanner Card Installation

2.3 POWER UP
When the Model 706 is turned on the instrument goes

through a power up sequence that is outlined as follows:

NDLES

After the software revision level is displayed, the Model 706
displays the primary address of the instrument for approx­imately 0.5 seconds. The primary address of the Model 706 is
factory set at 18.

Immediately after turing on the Model 706 via the power
switch, the display indicates the following for a number of
seconds:

1

1

1. This is a display test. The operator can note inoperative
display segments by comparing the Model 706’s display
with the figure above.

2. In addition, the pushbutton and the TALK, LISTEN and

REMOTE indicators turn on. All indicators turn on

simultaneously if operating correctly.

After the display test is complete, the Model 706 displays the
software revision level for approximately 0.5 seconds. The

following is an example of software revision level Al.

RI I

‘2-2

r---r-q

During the display test the Model 706 performs a digital self

test of the RAM circuitry and a cyclic redundancy check

(CRC) of the ROM circuitry. If a problem is found by these

tests the Model 706 displays a diagnostic number. This

number and its meaning is described in detail in Section 5.

After all the displays and test of the power up sequence, the
Model 706 comes to the default conditions that are listed in

Table 2-3.

NOTE
If upon power up the Model 706 displays the
slave or no loop message (refer to paragraphs

2.9.11 and 2.9.12) activate Program 90 to return
the Model 706 to normal operating conditions.
To activate Program 90, press PRGM, 9, 0.

Table 2-3. Power Up Default Conditions (Front Panel Operation)

Function or
Program

CHANNEL
TIME Time is not affected by power up.
DATE
RESET
INTERVAL
SINGLE
CONTINUOUS Continuous scan mode is set to inactive.
START/STOP
Program 0
Program 1
Program 2 Settle time is not affected by power up.
Program 3
Program 4 Save relay set up is cleared from display but still in memory. Channel 1 is displayed.
Program 5
Program 6 Number of poles is not affected by power up.
Program 7 Alarm time is set to 00.00.00.
Program 8 Self test is not activated.
Program 90
Program 91
Program 92 Program 92 is not affected by power up.

Program 93
Program 94

Program 99
FIRST
LAST
CLOSE
OPEN

*If channel 1 was previously programmed as the first channel, last channel, both or neither, it is displayed as such.

The FIRST and LAST functions are not affected by power up.

Default Conditions
Channel mode is selected, channel 1 is displayed and all channels are open.*

Date is not affected by power up.
Reset is not affected by power up.
Interval time is not affected by power up.
Single scan mode is set to inactive.

Start/Stop function is set to stop.
Digital I/O outputs are set to 000, the inputs are not affected by power up.
Date format is not affected by power up.

Primary address is not affected by power up. ..
Recall relay set up is cleared from display but still in memory. Channel 1 is displayed.

Program 90 is not affected by power up.

Program 91 is not affected by power up.

Program

Program 94 is not affected by power up.

Program 99 is not affected by power up.
The first function is not affected by power up.
The last function is not affected by power up.
All channels are open.
All channels are open.

93 is set to inactive.

To identify the previous state of the functions that are not af­fected by power up simply activate the desired function.
When the function is activated the previous state for that
function is displayed. Refer to paragraph 2.5.1 for informa­tion concerning the actuation of the desired function.

2.4 ENVIRONMENTAL CONDITIONS
All operation of the Model 706 should take place at an am-

bient temperature within the range of O°C to 50°C, up to
35OC at 80% noncondensing relative humidity. Environmen-

tal conditions for storage are -25OC to +65OC.

NOTE
If the Model 706 internal operating temperature
is higher than 75OC the thermal breaker on the
power supply will open up. This action will shut
down the Model 706. Refer to Section 5
paragraph 5.5.3.

2.5 OPERATING INSTRUCTIONS

2.5.1 Front Panel Controls
Table 2-4 lists all the front panel controls and buttons. Their

operation and function are briefly described in the table. For
complete details concerning the front panel controls refer to
paragraph 2.7. Refer to Figure 2-2 for a view of the front
panel controls.

2.5.2 Rear Panel Description
Table 2-5 lists all the rear panel connectors and terminals.

Their function and operation are briefly described in the table.

For complete details concerning the rear panel refer to
paragraph 2.8. Refer to Figure 2-3 for a view of the Model 706
rear panel.

2-3

Table 2-4. Front Panel Controls

Control
POWER ON/OFF

CHANNEL

CLOSE
OPEN
FIRST

LAST
RESET
INTERVAL

CONTINUOUS

SINGLE

START/STOP

PRGM

DATA
ENTER

CANCEL

TIME

DATE

TALK”

LISTEN*
REMOTE*

*Refer to Section 3 IEEE-488 bus operation.

Description

Turns the unit on or off.
Selects channel mode, turns on the channel LED and displays channel information (e.g.
open or closed, first or last). Increments channel number by one each time it is acti­vated when in the channel mode.
When activated the CLOSE button closes the presently displayed channel. Close is
indicated by a c on the far right digit of the display.
When activated the OPEN button opens the presently displayed channel. Open is indi­cated by an o on the far right digit of the display.
When activated the FIRST button specifies the presently displayed channel as the first
channel of a multi channel configuration. First is indicated by an F in the middle of the
display.
When activated the LAST button specifies the presently displayed channel as the last
channel of a multi channel configuration. Last is indicated by an L on the display.
When activated the RESET button opens all channels and reverts the display to the
specified first channel.
The INTERVAL button selects the programmed interval time for display and turns on the
interval LED. The interval time is the programmed time each channel is closed in a
scanning sequence.

The CONTINUOUS button selects the continuous scan mode and turns on the

continuous LED. The continuous scan mode allows the user to scan through the
programmed channels in a continuous cycle upon the actuation of the START/STOP

button.
The SINGLE button selects the single scan mode and turns on the SINGLE LED.
The single scan mode allows the user to scan through the programmed channels

one time upon the actuation of the START/STOP button.
The START/STOP button when activated initiates the selected scan mode and turns

on the START/STOP LED. Pressing the button during a scan stops the scan sequence

and turns off the START/STOP LED. When not in the continuous or single scan modes the

START/STOP button activates the STEP scan mode. Refer to paragraph 2.5.4.
The PRGM (Program) button when activated shows a display that prompts the user to

select one of the 15 front panel programs. Refer to paragraph 2.9 for complete
details and examples of the front panel’programs.
The O-9 buttons allow entry of numerical data onto the display.
The ENTER button loads the displayed data for the interval time, channel number,
time, date and program modes into the Model 706.

During the entry of data (C segment cursor is flashing) the CANCEL button cancels
the present display and reverts the instrument to the previous display.
When activated the TIME button selects for display the 24 hour time clock and

turns on TIME LED.
When activated the DATE button selects the date mode for display and turns on

the DATE LED.
When lit the TALK LED indicates that the Model 706 is in the talk mode.

When lit the LISTEN LED indicates that the Model 706 is in the listen mode.
When lit the REMOTE LED indicates that the Model 706 is in the remote mode.

I-

.2-G:

I

I . I

Table 2-5. Rear Panel Deswiption

Connections Description
Card Slots

SER. OUT

Each slot accepts one scanner card. There are a total of 10 slots.

The serial output connector is a female BNC connector that provides

connection to another Model 706 for a daisy chain configuration.

ALARM/SERIAL IN

The alarm function of this female BNC connector outputs a pulse when the

programmed alarm time is reached. The serial in function is used in a
daisy chain configuration where serial in is connected to the serial out of
another Model 706.

CHANNEL READY

This female BNC connector outputs a pulse at the completion of the pro­grammed channel settling time.

EXT. TRIGGER

This is a female BNC connector that initiates the selected scan mode upon
receiving the proper signal pulse.

DIGITAL I/O

The digital I/O port consists of 16 digital input/output lines along with four
lines that are +5V and IEEE common.

IEEE-488 INTERFACE

This standard connector provides connection to the IEEE-488 bus.

CONNECTOR

FUSE

The line power fuse provides protection for the AC power line input and is
rated as shown in Table 2-l.

AC Power Receptacle

The line power receptacle mates with three wire line cord and applies the
line power to the instrument.

2.5.3 Basic Front Panel Operation
This section provides the information necessary for basic

front panel operation of the Model 706. There are a number
of steps to follow in order to get the Model 706 ready for
scanning operation. These steps are as follows:

1. Install the desired scanner card(s). Refer to paragraph 2.2.2
for information concerning the installation of the scanner
cards into the Model 706.

2. Select appropriate line voltage. Refer to Section 5
Maintenance for information concerning the selection of

appropriate line voltage and proper fuse rating.

3. Turn on the Model 706. The instrument then goes through

the power up sequence that is described in paragraph 2.3
and displays one of the following:

I[ (Normal Condition)

(Matrix Mode Refer to

I o 1 Paragraph 2 9 71

. .

NOTE
If upon power up the Model 706 displays the
slave or no loop message (refer to paragraphs

2.9.11 and 2.9.12) activate Program 90 to return
the Model 706 to normal operating conditions.
To activate Program 90, press PRGM, 9, 0.

NOTE
Channel 1 is set as the programmed first chan­nel. If another channel was previously program­med as the first or last channel, then the F or L

will not be displayed upon power up.

4. Program the desired channel. (Channel mode is selected
upon power up).

A. Select the first channel.

1. Press the desired channel number from the DATA
group buttons O-9.

2. Press the FIRST button to program the presently
displayed channel as the first channel.

NOTE
Selecting a channel that does not exist in the
present set up causes the Model 706 to display
the following message.

no

Ch

B: Select the last channel.

1. Press the desired number from the DATA group but­ton O-9.

2. Press the LAST button to program the presently

-

dispkyed channel as the last channel.

5. Program the number of poles (0, 1, 2 or 4).
A. Press PRGM.
B. Press 6.
C. Select number of poles (0, 1, 2 or 4).
D. Press ENTER.

NOTE
The 0 pole mode is the matrix mode. Refer to
paragraph 2.9.7 for complete details concerning
programming of the different poles.

6. Program the interval time.
A. Press the INTERVAL button to select interval mode for

display.

B. Enter the interval time on the display by pressing from

the DATA group the desired time, within the limits of

000.010 to 999.999 seconds.

C. Press the ENTER button.

7. Program the desired scan mode. Press the SINGLE or
CONTINUOUS button to select one of these two scanning
modes. To select the step scan mode press the CHANNEL
button.

8. Press the START/STOP button to start the scanning se-

quence. For the step mode press the START/STOP but­ton each time a single channel is to be scanned.

Upon the actuation of the START/STOP button in step 9,
channel 1 is closed and the START/STOP LED is turned on.
Channel 1 remains closed for two seconds (programmed in­terval rate) and then opens. The START/STOP LED turns off
and the Model 706 advances to the next channel.

To scan the remaining channels, press the START/STOP
button each time a channel is to be scanned. After the last
programmed channel is scanned the instrument reverts to the
first programmed channel and turns off the START/STOP

LED. At this point the step scan sequence may be activated

again by pressing the START/STOP button, if desired.

The previous steps 1 through 8, show a general procedure to

-get the Model 706 into a scanning sequence. Paragraph 2.5.4
shows how to use the different scan modes, how to
chain several Model 706s for an extended number of chan­nels and how to scan using different scanner cards.

2.5.4 Scanning Examples
Example 1 Manual Scan (Step Scan&If it is desired to

scan through the programmed channels manually the Model
706 can be programmed for the step scan mode. In the step
scan mode the programmed channels can be scanned (closed

for the programmed interval rate and then opened) one chan-

nel at a time. Upon the actuation of the START/STOP but­ton a single channel will be scanned. For this example we will
choose the following parameters.

1. First channel is 1.

2. Last channel is 10.

3. Interval time is 2 seconds.

4. Number of poles is 2.

5. Use the step scan mode.
Use the steps outlined in Table 2-6 to program the Model 706

for the preceding parameters. For the sake of simplicity we
will use the Model 7056 general purpose scanner card for this

example.

daisy

To stop the scanning sequence and reset the Model 706 to
the programmed first channel simply press the RESET but­ton.

.-

Example 2 Single Scan-In the single scan mode all the
programmed channels are scanned sequentially one time
upon the actuation of the START/STOP button. The single
scan sequence operates as follows:

1. The START/STOP LED turns on.

2. The programmed first channel is closed for the pro-

grammed interval rate and then opened.

3. The Model 706 then advances to the next channel, closes

it for the programmed interval rate and then opens it.

4. This sequence is repeated up to and including the pro-

gammed last channel. At this point the Model 706 reverts
to the programmed first channel and turns off the

START/STOP LED.

5. The single scan sequence is now complete.
To help illustrate a single scan sequence we will choose the

following parameters. For the sake of simplicity we will use
the Model 7056 general purpose scanner card.

1. First channel is 5.

2. Last channel is 25.
3: Interval time is 0.5 seconds.

Table 2-6. Step Scan Example

Step Action Comments

1 Install the Model 7056 General Purpose

Scanner Card into slot 1 of the Model

706.

2 Select appropriate line voltage and turn

on the Model 706.
3 Press PRGM, 6.
4

Press 2, ENTER.

Press 0, 0, 1, FIRST.

i

Press, 0, 1, 0, LAST.

7

Press INTERVAL, 0, 0, 2,0,0,0, ENTER.

8 Press CHANNEL, RESET.
9 Press START/STOP.

Refer to paragraph 2.2.2.

Selects PROGRAM 6.
Selects the 2-pole mode, refer to para­graph 2.9 for more information about
front panel programs.
Programs channel 1 as the first channel.
Programs channel 10 as the last channel.
Programs the interval time for two seconds.
Selects the channel mode for display and
reverts to the first channel.
Initiates the step scan mode.

.

4. Number of poles is 2.

5. Use single scan mode.
Use the steps outlined in Table 2-7 to program the Model 706

for the preceding parameters.
Upon the actuation of the START/STOP button in step 10,

channel 5 is closed for 0.5 seconds (programmed interval
rate) and then opens. The Model 706 advances to the next
channel and closes it for the programmed interval rate and

then opens it.
The sequence continues up to and including the last pro-

grammed channel. At this point the Model 706 reverts to the
programmed first channel and turns off the START/STOP
LED. The single scan sequence is now complete.

Pressing the START/STOP button during a single scan se­quence stops the scan at the presently displayed channel.
The channel remains closed and turns off the START/STOP

LED. To continue the scanning sequence from the presently
displayed channel press the START/STOP button.

To stop the scanning sequence and reset the Model 706 to
the programmed first channel (which is 5 in this example)
simply press the RESET button.

Example 3 Continuous Scan-In the continuous scan
mode the scanning sequence described in example 2 repeats
continuously until at least one of the following conditions are
met:

1. Power is interrupted.

2. During the sequence, the START/STOP button is

pressed.

3. RESET button is pressed.

4. PRGM button is pressed.

5. DATE button is pressed.

6. TIME button is pressed.

7. CHANNEL button is pressed.
In the continuous scan mode all the programmed channels

are scanned sequentially and the scan sequence is repeated
continuously. The continuous scan is started by pressing the

START/STOP button and it operates as follows:

1. The START/STOP LED is turned on.

2. The programmed first channel is closed for the programm-

ed interval rate and then opened.

3. The Model 706 then advances to the next channel, closes

it for the programmed interval rate and then opens it.

4. This sequence is repeated up to and including the pro-

grammed last channel. At this point the Model 706 reverts
to the programmed first channel and repeats the sequence
continuously.

To help illustrate a continuous scan sequence we will choose
the following parameters. For the sake of simplicity we will
use the Model 7056 general purpose scanner card.

1. First channel is 1.

2. Last channel is 100.

3. Interval time is 0.3 seconds.

4. Number of poles is 2.

5. Use continuous scan mode.

Use the steps outlined in Table 2-8 to program the Model 706
for the preceding parameters.

-

Ster, 1 Action

Install the three Model 7056 scan- Refer to paragraph 2.2.2.

1.
ner cards into slots 1, 2

* and 3 of the Model 706.

Select appropriate line voltage

2

and turn on the Model 706.
Press PRGM, 6. Selects PROGRAM 6.

3

Press 2, ENTER. Selects the 2-pole mode. Refer to paragraph 2.9 for

4

Press 0, 0, 5, FIRST. Programs channel 5 as the first channel.
Press 0, 2, 5, LAST. Programs channel 25 as the last channel.

z

Press INTERVAL, 0, 0, 0, 5, Programs the interval time for 0.5 seconds.

7

0, 0, ENTER.
Press CHANNEL, RESET. Turns on the CHANNEL LED, selects the channel

8

Press SINGLE. Selects the single scan mode and turns on the

9

Press START/STOP.

10

Table 2-7. Single Scan Example

I Comments

more information concerning front panel programs.

mode for display and resets to the programmed first
channel.

SINGLE LED.
Initiates the single scan sequence.

2-9

Table 2-9. Continuous Scan Example

Step

1

Action
Install 10 Model 7056s into slots

Comments
Refer to paragraph 2.2.2.

I-IO of the Model 706.

2

Select appropriate line voltage

and turn on the Model 706.

3

Press PRGM, 6.

4

Press 2, ENTER.

Selects PROGRAM 6.
Selects the 2-pole mode. Refer to paragraph 2.9 for more

information about front panel programs.

5

Press 0, 0, 1, FIRST.

6

Press 1, 0, 0, LAST.

7

Press INTERVAL, 0, 0, 0, 3,

Programs channel 1 as the first channel.
Programs channel 100 as the last channel.
Programs the interval time for 0.3 seconds.

0,0, ENTER.

8

Press CHANNEL, RESET.

Turns on the CHANNEL LED, selects the channel
mode for display and resets to the programmed first
channel.

9

Press CONTINUOUS.

Selects the continuous scan mode and turns on the
CONTINUOUS LED.

10

Press START/STOP.

Initiates the continuous scan sequence.

Upon the actuation of the START/STOP button in step 10,
channel 1 is closed and the START/STOP LED is turned on.
Channel 1 remains closed for 0.3 seconds (programmed inter-

val rate) and then opens. Model 706 advances to the next

channel and closes it for the programmed interval rate and

then opens it.

This sequence continues up to and including the last pro­grammed channel. At this point the Model 706 reverts to the
programmed first channel and repeats this scan sequence
continuously.

Pressing the START/STOP button during a continuous scan
sequence stops the scan at the presently displayed channel.

The channel remains closed and the START/STOP LED

turns off. To continue the scanning sequence from the
presently displayed channel press the START/STOP button.

To stop the scanning sequence and reset the Model 706 to
the programmed first channel (which is 1 in this example)
simply press the RESET button.

Example 4 Daisy Chain Configuration-In a situation

where more than 100 channels are required the Model 706

can be connected to other Model 706 scanners to increase
the number of available channels. A total of five Model 706
scanners can be connected together to increase the number

of available channels to 500. The method of connection is
shown in Figure 2-4 and is referred to as a daisy chain con­figuration.

One of the Model 706 scanners is programmed (by user

choice) as the master control instrument of the configuration.
The other Model 706 scanners are programmed as the slaves.
As slaves, the front panel controls of these instruments are

locked out (not functional) except for the power switch, front
panel Program 90 and 91, The power switch is functional but
when power is cycled the slave instrument powers up to the
slave condition. The only method out of the slave condition is
to activate Program 90 or 91. For complete details concerning
front panel programs refer to paragraph 2.9.

In this example the master Model 706 will be programmed to
scan 500 channels. The equipment required for this example
is shown in Table 2-9. For the sake of simplicity we will use
Model 7056 general purpose scanner cards for this example.
To help illustrate this daisy chain example we will choose the
following parameters:

1. First Channel is 1.

2. Last channel is 500.

3. Interval time is 0.2 seconds.

4. Number of poles is 2.

5. Use continuous scan mode.

2-10

Table 2-9. Required Equipment for Daisy Chain Example

Description
Scanner Mainframes -

Scanner Cards General Purpose
Cables

Specification Mfg. Model Qty

Keithley 706 5
Keithley 7056 50

BNC to BNC Keithley 7051-5 5

Use the steps outlined in Table 2-10 to program the daisy
chain configuration for the preceding parameters.

Upon the actuation of the START/STOP button in step 13,
the continuous scan sequence starts from the progammed
first channel. The continuous scan mode operates in the
same manner as described in example 3. The only difference
is that this example will scan 500 channels and then repeat
the sequence continuously.

Pressing the START/STOP button during a continuous scan

Table 2-10. Daisy Chain Example

SteD Action

Install the Model 7056 scanner cards
into the Model 706 mainframes.
Set up the circuit shown in
Figure 2-4.
Select appropriate line voltage and
turn on the Model 706 scanners.
Program 4 Model 706 scanners as a
slave by pressing PRGM, 9, 2 on
each 706.
Select the remaining Model 706 as

5

the master of the configuration
by pressing PRGM, 9, 1.

Initiating front panel PROGRAM 92 locks up the
Model 706 front panel, except for the power
button, PROGRAM 90 and 91. The following
message is displayed while front panel PRO­GRAM 92 is activated.

Comments
Refer to paragraph 2.2.2.

Programs the Model 706 as slaves in the daisy
chain configuration.

Sets one Model 706 as the master control of the
daisy chain configuration.

NOTE

.-_

sequence stops the scan at the presently displayed channel.
The channel remains closed and the START/STOP LED
turns off. To continue the scanning sequence from the

presently displayed channel press the START/STOP button.

The first and last channels are not battery backed up in the

daisy chain configuration.
To stop the scanning sequence and reset the Model 706 to

the programmed first channel (which is 1 in this example)
simply press the RESET button.

On the master control 706 press

6

PRGM, 6.

7 Press 2, ENTER.

0, 0, 1, FIRST.

Press

8
9

10
11

5, 0, 0, LAST.

Press

INTERVAL, 0, 0,

Press
ENTER.
Press CHANNEL, RESET.

Press CONTINUOUS.
Press START/STOP.

-5LRl.E -

r

Selects PROGRAM 6. All programming will be done
on the master control 706 from this
step on.
Selects the 2-pole mode. Refer to paragraph

2.9 for more information concerning front panel
programs.
Programs channel 1 as the first channel.
Programs channel 500 as the last channel.

0, 2, 0,

Figure 2-4. Daisy Chain Configuration

0,

Programs the interval time for 0.2 seconds.
Turns on the CHANNEL LED, selects the

channel mode for display and resets to the
programmed first channel.
Selects the continuous scan mode and turns
on the CONTINUOUS LED.
Initiates the continuous scan mode sequence.

J

The display in the daisy chain configuration includes an addi­tional digit to accomodate up to 500 channels, 1000 channels

in l-pole mode. The display is shown as follows:

NOTE
Channels 1, 11 and 21 are the temperature
references for the cards.

I ml If 01

L I

NOTE
Scanning at a high rate of speed in the daisy
chain configuration may not show the scanned
channels on the mainframe’s display.

Example 5 Temperature Scan-With the Model 7057A
thermocouple scanner card, the Model 706 can scan
temperature points. Since the Model 7057A combines the
functions of a thermocouple scanner and uniform
temperature reference it is especially useful for scanning
thermocouples. The input terminals are #lO alloy copper set

in an isothermal block to minimize temperature differences. A
thermistor sensor within the isothermal block is used with a

bridge network located on the Model 7057A. The
temperature of the heat sink is used to calculate the corrected
thermocouple output. The output voltages of each thermo­couple must be converted to temperature (OC or OFI using ap-

propriate thermocouple tables or polynominal equations.
These equations and tables are provided in the Model 7057A

Instruction Manual.

In this example the Model 706 will be programmed to scan 25
separate temperatures. The following parameters will be pro-

grammed into the Model 706.

1. First channel is 1.

2. Last channel is 25.

3. Number of poles is 2.

4. Interval time is 3 seconds.

5. Use the continous scan mode.
Table 2-11. Temperature Scan Example

Use the steps outlined in Table 2-11 to program the Model

706 for the preceding parameters.

As you can see this temperature scan example is quite similar
to the continuous scan example (example 3). The only ap­preciable difference is the type of scanner card used in each
example. Except for specified values of the parameters
selected, front panel operation is similar in all scanning se­quences. _

For more detailed information concerning temperature scans
refer to the Model 7057A Instruction Manual.

Example 6 Low Current Scan-With the Model 7058 in-

stalled, the Model 706 is capable of scanning currents in the

range of picoamps. The Model 7058 is a low current scanner

card that is field installable in the scanner mainframe. The

Model 7058 is designed to introduce a minimum of offset cur-

rent (c IpA), while guarding ensures that high isolation

(10153) is maintained between input signals.

The actual measurement of the low current should be done
with a high quality electrometer such as the Model 614 or

Model 619. A high quality picoammeter such as the Keithley

Model 480 could also be used. All three of these instruments
are capable of measuring in the range of picoamps with high
accuracy. To measure such low currents a number of

measurement parameters such as, input impedance, cabling,

measuie~ment~ configuration, a&.,- must be taken into con;
sideration. This example does not attempt to give instructions
on low current measurement, the instruction manuals pro­vided with each of the previously mentioned electrometers

2-12

Step

1

2
3

4

9

10

Action
Install a Model 7057A into

slots 1, 2 and 3 of the
Model 706.
Select appropriate line voltage
and turn on the Model 706.

Press PRGM, 6.
Press 2, ENTER.

Press 0, 0, 1, FIRST.
Press 0, 2, 5, LAST.
Press INTERVAL, 0, 0, 3, 0,

0, 0, 0, ENTER.

Press CHANNEL, RESET.

Press CONTINUOUS.
Press START/STOP.

Comments
Refer to paragraph 2.2.2.

Selects PROGRAM 6.
Selects the 2-pole mode, refer to paragraph

2.9 for more information concerning front
panel programs.
Programs channel 1 as the first channel.
Programs 25 as the last channel.

Programs the interval time for three seconds.

Turns on the CHANNEL LED, selects the
channel mode for display and resets the
instrument to the first channel.
Turns on the CONTINUOUS LED and selects
the continuous scan mode.

Initiates the continuous scan mode sequence.

and picoammeter give step by step instructions on how to
measure low currents accurately.

In this example, the Model 706 will be programmed to scan
37 low current sources. Also, the following parameters will be
programmed into the Model 706.

1. First channel is 1.

2. Last channel is 37.

3. Interval time is 2 seconds.

4. Number of poles is 2.

5. Use single scan mode.
Use the steps outlined in Table 2-12 to program the Model

706 for the preceding parameters.

As you can see this low current scan example is similar to the
other scanning examples. The only appreciable difference is

Table 2-12. Low Current Scan Example

the type of scanner card used in each example. Except for the
specified values of the parameters selected, front panel
operation is similar in all scanning sequences.

For more detailed information concerning low current scans
refer to the Model 7058 Instruction Manual.

2.6 FRONT PANEL CLOCK OPERATION
The CLOCK group on the front panel contains the TIME and

DATE buttons. The clock continues to run after the Model
706 is turned off. This is because the clock’s power circuitry
is backed up by battery BTlOl. The time is shown in a 24
hour display-format. To display the time mode simply press
the TIME button. To set the time, use the steps outlined in
Table 2-13.

Step Action

Install a Model 7058 into slots

1

1, 2, 3 and 4 of the Model

706.
Select appropriate line voltage and

2

turn on the Model 706
Press PRGM, 6.

3

Press 2, ENTER.

4

Press 0, 0, 1, FIRST.

5

Press 0, 3, 7, LAST.

6

Press INTERVAL, 0, 0, 2, 0, 0,

7

0, ENTER.

Press CHANNEL, RESET.

8

Press SINGLE. Turns on the SINGLE LED and

9

Press START/STOP. Initiates the single scan mode sequence.

10

SteD 1 Action I Comments

2

*Pressing the TIME button during a scan sequence stops the sequence,

turns on the TIME LED and selects the time mode for display.

Comments
Refer to paragraph 2.2.2.

Selects PROGRAM 6.
Selects the 2-pole mode, refer to para­graph 2.9 for more information concerning

front panel programs.

Programs channel 1 as the first channel.
Programs channel 37 as the last channel.
Programs the interval time for two seconds.

Turns on the CHANNEL LED, selects the

channel mode for display and resets the
instrument to the first channel.

selects the single scan mode.

Table 2-13. Setting the Time

I

1 Press TIME”.

Selects the time mode for
display and turns on the
TIME LED.

Press the DATA buttons (O-9) Set the time for 7:30 A.M.
that correspond to the desired
time. For example, to set the
time for 7:30 A.M. press
0, 7, 3, 0, 0, 0, ENTER.

. .

2-13

Upon the actuation of the ENTER button, the time is set to

7:30 A.M. As another example, set the time to 7:30 P.M. by

pressing 1, 9, 3, 0, 0, 0, ENTER.

To display the DATE mode, simply press the DATE button.
The date is displayed in one of two formats. The formats are
the American date format and the International date format.
These formats are described in paragraph 2.9.2. The formats
are selected exclusively by front panel Program 1. Refer to
paragraph 2-9 for complete details concerning the front panel
programs. To set the date, use the steps outlined in Table

2-14.
As another example, set the date to August 18th for the inter-

national date format by pressing:

1. PRGM, 1 (Selects front panel Program 1 for display.)

2. 1, ENTER. (Selects the international date format.)

3. 1,8,0, 8, ENTER. (Enters 18.08 for the date August 18th.)

NOTE

If upon power up the Model 706 displays the

slave or no loop message (refer to paragraphs

2.9.11 and 2.9.12) activate Program 90 return
the Model 706 to normal operating conditions.
To activate Program 90, press PRGM 9,0.

To identify the previous state of the functions that are not
affected by power up, simply activate the desired function.
When the function is activated the previous state for that
function is displayed. Refer to paragraph 2.5.1 for informa­tion concerning the actuation of the desired function.
Refer to Table 2-2 for power up default conditions.

2. CHANNEL-The CHANNEL button selects the channel
mode for display. The channel number is displayed on the
front panel as a two digit number, except in the daisy chain
or matrix mode. Upon power up the Model 706 reverts to
the channel mode.

2.7 DETAILED FRONT PANEL CONTROLS DESCRIP­TION

1. POWER ON/OFF-The On/Off switch operates on the
push-push principle. Depressing this button turns the in­strument on. Once the instrument is on, pressing (releas­ing) this button turns the instrument off. When the Model
706 is turned on it goes through a power up sequence as
outlined in paragraph 2.3. When the power up sequence is
complete the Model 706 displays the following:

[ Cl1 F lx-

where:
01 = Channel Number One

F = First Channel*

o = Channel Open

*If channel 1 was previously programmed as the first

channel, last channel or both, it is displayed as such. This

is because the first and last functions are battery backed up

and not affected by power up.

Table 2-14. Setting the Date

Pressing the CHANNEL button while the Model 706 is in

the channel mode increments the channel number by one.

Actuation of the clock, date, PRGM, single, continuous,
or interval functions takes the Model 706 out of the chan­nel mode. Actuation of the reset function during any of the

front panel programs except Programs 90, 91, 92 and 99

reverts the Model 706 to the channel mode.

3. OPERATION-The OPERATION group consists of four
function buttons: FIRST, LAST, CLOSE and OPEN. The
buttons are described as follows:

CLOSE-Upon actuation of the close function the

present!y disp!ayed channe! rt!asesi !f fhF( prasent!y
displayed channel is already closed, pressing the CLOSE
button has no effect on the channel. When the presently

displayed channel is open and the CLOSE button is press­ed the open and close digit (furthest digit on the right of
the display) changes to a c and that channel is closed.
Refer to the following display.

iYnT--&

Open and Close Digit

o = Channel Open

c = Channel Closed

2-14

SteD 1 Action I Comments

Press DATE.*

1

Selects the date mode for display and turns on
the DATE LED.

Press the DATA buttons (O-9)

2

that correspond to the desired

For example, to set the date to August 18th

for the American date format follow steps 3,

date. 4 and 5.

3

Press PRGM, 1.
Press 0, ENTER.

4
5

Press 0: 8, 1, 8, ENTER.
..­“Pressing the DATE button during a scan sequence stops the sequence, turns on the DATE LED

_ -_--.

Selects front panel PROGRAM 1 for display.
Selects the American date format.
Enter 08.18 for the date August 18th.

and selects the date mode for display.

To ensure reliable performance, do not simultaneously close
more relays than the mainframe power supply can handle. The
closure limit depends on factors such as the drive current of
each relay, temperature, and ventilation.

Pressing the-FIRST button designates the

channel and the display format is as follows:

channel as first

Table 2-I 5 lists the maximum current available from the main­frame power supply for energizing relays under different operat-

ing conditions. To find the maximum number of simultaneous
relay closures, divide the current listed by the specified drive

current per relay. Remember that some cards energize two re-

lays for each channel (e.g., Models 7063 and 7067).

Table 2-15. Maximum Relay Drive Current from

Mainframe

Rack-

Bench-top

(Louvers between between

Temp.

23’ C 4.3A
50” c 3.3A

OPEN - Upon actuation of the open function the presently dis­played channel opens. If the presently displayed channel is al-

ready open, pressing the OPEN button has no effect on the
channel. When the presently displayed channel is closed and
the OPEN button is pressed the open and close digit (furthest
digit on the right of the display) changes to an o and that channel

is opened. Refer to the following display.

o=

Channel Open

c=

Channel Closed

Close and open for each channel remains valid
even when not viewing the channel or the display.

FIRST - Upon actuation of the FIRST button the presently dis­played channel is designated as the first channel of a multi­channel configuration. If the presently displayed channel has al­ready been specified as the first channel, pressing the FIRST
button has no effect on the channel or the display. If the pres­ently displayed channel has not been designated as the first

channel, the display format is as follows:

unobstructed) scanners) scanners)

mount mount

(1” space

4.3A

2.3A

Open and Close Digit

NOTE

Rack-

(No space

4.3A

1.3A

where:
01 = Present Channel

F = First Channel
o =’ Channel Open

There are a number of ways to change the designated first
channel they are listed as follows:

A.

Select the desired new channel then press FIRST.

B. Activate Program 99.

C. Activate Program 90.

NOTE
Powering the unit down will not change the desig­nated first channel.

LAST - Upon actuation of the LAST button the presently dis­played channel is designated as the last channel of the multi­channel configuration. if the presently displayed channel has al­ready been specified as the last channel, pressing the LAST
button has no effect on the channel or the display. If the pres-

ently displayed channel has not been designated as the last

channel, the display is as follows:

cl

--I

where:
01 ,= Present Channel

o = Channel Open

Pressing the LAST button designates the channel as last chan­nel and the display format is as follows:

I
/ 10 L, 01

where:

10 = Present Channel

L = Last Channel

o = Channel Open

There are two ways of changing the designated last channel

they are listed as follows:

where:
01 = Present Channel

o = Channel Open

+

2-15

A. Select desired new channel and press LAST.
B.

Activate Program 99.

NOTE

Powering the unit down will not change the

designated last channel.

If the presently displayed channel is designated as the first

and last channel the display format is as follows:

I IU FLol

I

where:

- -30 = Present Channel
F = First Channel
L = Last Channel

o = Channel Open

4. CONTROL-The CONTROL group of buttons consist of
the RESET button and the INTERVAL button. The buttons
and their functions are described as follows:

RESET-Actuation of the RESET button opens all chan­nels of the Model 706 and reverts the display to the
designated first channel. Actuating the RESET button dur­ing a single or continuous scan mode sequence stops the

scan sequence, opens all channels and reverts the display
to the designated first channel. The RESET button is inac­tive in the time, date, interval and Programs 8, 90, 91, 92
and 99.

INTERVAL-The INTERVAL button selects the program-

med interval time for display. The interval time is the pro­grammed time each channel is closed when using the step,
single or continuous scan mode. The interval time ranges
from 000.010 seconds to 999.999 seconds. Upon the ac­tuation of front panel Program 99 the interval time is
reverted to the default condition of 000.010. Powering the

unit down will not change the programmed interval time.

. There are two ways the interval time can be changed and

they are as follows:
A. Activate Program 99 (resets to 000.010).
B. Press the INTERVAL button and then press the ap-

propriate number from 000.010 to 999.999. Press
ENTER.

5. DATA-The DATA group of buttons consist of the O-9,
CANCEL and ENTER buttons. They are described as

follows:

I

O-g-The O-3 data keys allow entry of numerical data onto

the display. The O-9 keys can be used to enter numerical

constants on the display for certain functions such as inter­val time, channel number, front panel programs, time and
date.

ENTER-Upon actuation, the ENTER button loads the
displayed data for channel number, interval time, time,
date and program modes into the Model 706. In the pro­gram mode, the ENTER button initiates the selected pro­gram (O-7) after the necessary data is entered onto the
display.

CANCEL-During the entry of data (C segment cursor is

flashing) the CANCEL button cancels the present display
and- reverts the instrument to the previous display. The

CANCEL button is functional only when entering data on-

to the display in the channel, interval, time, date and pro­gram modes.

Refer to Table 2-16 for an example of the CANCEL button
function.

In Table 2-16 the interval display mode is selcted and a 120
second interval time is entered onto the display. For some
reason or other the interval time in step 2 is an error so the
CANCEL button was pressed to revert the display to the
previously programmed interval time.

6. SCAN-The SCAN group of buttons consists of SINGLE,
CONTINUOUS, and START/STOP buttons. These three

buttons select the different scan modes and are described
as follows:

CONTINUOUS-Actuation of the CONTINUOUS button

selects the continuous scan mode and turns on the con­tinuous LED. The continuous scan mode allows the user to

scan through the programmed channels at the programm-

ed interval rate, continuously. The continuous scan mode
is initiated upon the actuation of the START/STOP button
or upon receiving the appropriate external trigger pulse.

Pressing the START/STOP button during a continuous
scan sequence stops the scan at the presently displayed
channel. To continue the scan sequence simply press the
START/STOP button.

2-16

step

1

2
3

Table 2-16. CANCEL Function Example

Action Comments
Press INTERVAL.

Press 1, 2, 0, 0, 0, 0.
Press CANCEL.

Selects interval display mode and turns on
the INTERVAL LED.
Enters 120 second interval time on the display.
Reverts the interval time data of step 2 to

the previously programmed interval time.

SINGLE-Actuation of the SINGLE button selects the
single scan mode and turns on the single LED. The single
scan mode allows the user to scan through the programm­ed channels at the programmed interval rate, one time.

TIME-The TIME button selects for display the 24 hour
time clock. The format showing 2:45 pm is as follows:

~W5.UUl

The single scan mode is initiated upon the actuation of the
START/STOP button or upon receiving the appropriate
external trigger pulse.

Pressing the START/STOP button during a single scan se­quence stops the scan at the presently displayed channel.

To continue the scan sequence simply press the

START/STOP button.

-­START/STOP-The START/STOP button is an alter-

nate action control that has three functions. The three

functions are the start function, stop function and the step
scan mode. These functions are described as follows:

A. START-The start function of the START/STOP but-

ton initiates the selected scan mode. When all the
parameters (interval time, first and last channels, scan
mode, etc.1 of a multi-channel configuration have been
programmed and the user is ready to scan the chan­nels, press the START/STOP button to initiate the
scan sequence. During the scan sequence the
START/STOP LED is activated.

B. STOP-The stop function of the START/STOP button

stops the previously initiated scan sequence. That is,

pressing the START/STOP button during a scan se-

quence stops the sequence at the presently displayed

channel and turns off the START/STOP LED. The
STOP function is active only during a scan sequence.

C. STEP-The step scan mode allows the user to manual-

ly step through the programmed channels. The step
scan mode is selected by pressing the channel button,
programming the interval rate and pressing the

START/STOP button. When the interval rate has been
programmed and the user is ready to manually scan the
channels, press the START/STOP button to scan one

- ~~
channel.

Upon initiating the step scan mode the START/STOP

LED turns on, the presently displayed channel is closed
for the programmed interval rate, the channel is then
opened and the START/STOP LED turns off. At this
point the Model 706 advances to the next channel and
then stops.

To scan the next channel press the START/STOP but­ton and the Model 706 repeats the same sequence with
the presently displayed channel.

7 .CLOCK-The CLOCK group of buttons consist of the

TIME and DATE buttons. The clock (time and date) con-

tinues to run after the instrument is powered down

because the clock circuitry is backed up by battery BTlOl .

The two buttons are described as follows:

The time can be set by pressing the TIME button, entering
the appropriate time onto the display and then pressing the

ENTER button. Note that the time 28:00:00 to 33:59:59

can be entered. It is invalid but it can be entered.

DATE-The DATE button selects the date mode for
disolav. The date disolav has two formats. The formats
showing June 17th are a’s follows:

American Date Format /I ’
International Date Format 1
The formats are selected by front panel Program 1. Refer

to paragraph 2-9 for more information concerning front
panel programs. The date can be set by pressing the DATE
button, entering the appropriate date onto the display and

then pressing ENTER. Refer to paragraph 2.6.

8. PRGM-The PRGM button when pressed shows a
display that prompts the user to select one of the 15 front
panel programs. Refer to paragraph 2.9 for complete
details and examples of the front panel programs.

9.

IEEE Indicators-The IEEE bus indicators (TALK,
LISTEN and REMOTE) identify the present status of the
IEEE-488 bus. The indicators are described as follows:

TALK-The TALK LED when lit indicates that the Model
706 is in the talk mode. The Model 706 does not have to
be in the remote mode for it to be in the talk mode.

LISTEN-The LISTEN LED when lit indicates that the
Model 706 is in the listen mode. The Model 706 must also

.be in the remote mode for it to be in the listen mode.

REMOTE-The REMOTE LED when lit indicates that the
Model 706 is in the remote mode.

2.6 DETAILED REAR PANEL DESCRIPTION

1. CARD SLOTS-Each card slot on the Model 706 rear
panel can accomodate one scanner card. There are a total

of 10 card slots. That is, the Model 706 can accomodate 10
scanner cards. The Model 706 with 10 scanner cards has

up to 100 2-pole channels. Refer to paragraph 2.2.2 for in-

structions on how to remove or install the various scanner
cards.

2. EXT. TRIGGER-The external trigger is a BNC connector
that initiates the selected scan mode (single, step or con­tinuous) in the same manner as the START/STOP button.
The input trigger pulse must be a negative going lTL level

pulse with a minimum duration of met. The selected scan
mode is initiated upon the negative transition of the pulse.

I- / 7 D b

2-17

This feature can be used to trigger the Model 706 into the
selected mode using another instrument.

3. CHANNEL READY-The CHANNEL READY output is a
BNC output connector that provides a negative going lTL

level pulse with a duration of greater than 10pec at the
completion of the programmed settling time. This features
can be used to inform another instrument (DMM, Source,
etc.) that the present channel settling time is completed.

4. ALARM/SERIAL IN-The ALARM/SERIAL IN connec-

tor has two functions. The alarm out function and the

serial in function. They are described as fokows:

ALARM-The alarm function outputs a negative going
TTL level pulse with a duration of greater than 10wec. This

‘pulse appears once upon reaching the programmed alarm

time. The alarm time can be programmed by front panel
Program 7. When the alarm time is set to 00.00.00 the
pulse does not appear. The programmed alarm time is set

to 00.00.00 when power to the instrument has been

cycled. Refer to Table 2-3.

SERIAL IN-The serial in function is used in a daisy chain
configuration where the ALARM/SERIAL IN connector is
connected to the SERIAL OUT connector of another
Model 706. Refer to example 4 of paragraph 2.5.4.

5. SER. OUT-The SER. OUT connector is a BNC output

connector that provides a connection to another Model
706 for a daisy chain configuration. The SERIAL OUT con­nector is applied to the ALARM/SERIAL IN connector of
another Model 706. Refer to example 4 of paragraph 2.5.4.

6. DIGITAL l/O-The DIGITAL I/O port consists of 16

digital input and output lines along with four lines that are

+ 5V and IEEE common. Eight of the I/O lines can be used
for inputs and eight can be used for outputs. The outputs
will drive one TTL load and the inputs are TTL compatible.

For more information concerning the digital I/O port refer

to paragraph 3.5.8 step 15.

7. IEEE-488 INTERFACE-The IEEE bus connector pro­vides bus connection to the Model 706. The connector

mates with the Keithley Model 7008-3 and 7008-6 cables.

For more detailed information concerning the IEEE con-

nector refer to paragraph 3.3.

8. LINE FUSE-This is the line power fuse and it is rated

as specified in Table 5-2.

9. LINE RECEPTACLE-The line power receptacle mates
with a three wire line cord which provides connections to

line voltage. For correct line voltage selection refer to
paragraph 5.3.

2.9 FRONT PANEL PROGRAMS

15 internal proSCams of the Model 706. The programs are ac-

tivated by pressing the PRGM button along with the button

representing the appropriate program number. The programs
do a number of various tasks which are summarized in Table

2-17.

Program Notes

1.

Each program is entered by pressing the PRGM button

followed by the desired program number.

2.

Pressing the PRGM button selects the program mode and

the following is displayed:

r--TzTj --

As you have noticed, the question mark is flashing. This is
prompting the operator to enter the desired program
number (refer to Table 2-17). After entering the program
number the Model 706 goes into the program selected.

Then the display prompts the operator to enter numerical

data. Numerical data varies with each program.

3.

New programs may be entered without clearing a program
that is presently running. To do so, press the PRGM but­ton followed by the desired program number.

4.

Data is entered into the digit whose “C” segment (cursor)
is flashing by pressing the desired number button. The
“C” segment of a display is shown as follows:

1-G +fment

As each digit is entered, the cursor moves one place to the

right until the last digit on the right is reached. Then it is
cycled to the first digit on the left.

Only as many significant digits as necessary need to be

5.
entered. The Model 706 will complete the constants with
trailing zeroes where necessary.

Invalid keys will be ignored. If an invalid key is pressed the

6.
blinking “C” segment (cursor) remains at the current digit.

If an incorrect digit is entered, the complete constant must

7.
be reentered. The new value may be entered by cycling

the display around to the beginning. To do this, repeatedly

press one of the number buttons.

If too many digits are entered, the display begins again at

8.
the first digit on the left. All the digits in the constant must
then be entered again. This applies only to Programs 0,2,
3, 6 and 7.

Once all the digits of the desired constants are shown on

9.
the display, the constant is entered into the program by
pressing the ENTER button. This applies only to Programs
0 through 7.

This section contains instructions necessary for operating

2-18

the

Table 2-17. Summary of Front Panel Programs

2.9.2 Program 1 Date Format

Program

0”

1
2
3
4

:

7*
8”
90
91

E*

ii;*

*Denotes NOT battery backed up.

2.9.1 Program 0 Digital I/O
Program 0 allows the user to control the outputs on the

digital I/O port. The I/O port is located on the rear panel of
the Model 706. The output code is displayed in base eight

(octal) on the front panel. The actual I/O port output data is

in 8 bit form. The range of octal output data that can be
entered on the front panel display is 0 to 377. The maximum
octal data is 377 which corresponds to 11111111 in BCD. If
the front panel data is entered as 377 then the digital I/O out­put data is 11111111. To initiate Program 0 use the following

procedure:

1. Press PRGM and the following is displayed:

2. Press 0 and the kIlowing is displayed for approximately 0.5

seconds:

After the Out/In message is displayed, the Model 706
displays the following:

Operation
Digital I/O (Input/Output) Port

American/International Date Format

Relay Settle Time
Set IEEE Primary Address
Save Relay Set Up

Recall Relay Set Up
Pole Configuration (0, 1, 2 or 41

Alarm Time Set

Diagnostic Self Test
Stand Alone
Master

Slave

Inspect Mode

Clear

Reset

I

I l-5-o r’ :

T I

L

Program i is used to select one of two date formats. The two

formats are the american date format and the international

date format. The display format is as follows:
American: mm.dd

International: dd.mm

where: mm = month

dd = day

To enable Program 1 and select the international date format,

use the following procedure:

1. Press PRGM. Selects program mode and displays Pro 1.
NOTE

The flashing question mark on the display pro­mpts the user for the decimal program number.

2. Press 1. This action selects Program 1 and displays the

following:

H fl E /

where:
AOEI = American or International

0 = American Date Format

1 = International Date Format

Notice that the last digit’s “C” segment is flashing. This
prompts the user to enter the appropriate data.

3. Press 1. This action selects the international date format.

4. Press ENTER. This action displays the data in the interna­tional date format and turns on the DATE LED.

To enable program 1 and select the american date format use
the following procedure:

1. Press PRGM. Selects program mode, displays Pro ? and
turns off the DATE LED.

2. Press 1. Select Program 1 and the following is displayed:

I
jgf! Indicates which Format

n

1 ucJauuu/

Where the first three digits represent the digital output (in
octal) and the last three digits represent the digital inputs

(in octal).

NOTE
The digital l/O inputs are defined by the connec­tions on the input pins. With no connections on
the input pins (located on the rear panel) the in-

puts are undefined. The digital I/O outputs are
programmed by using Program 0.

3. Press 0,7,7, ENTER. This action programs the output bits
on the digital I/O port for 00111111.

3. Press 0. This selects the american date format and turns on
the DATE LED.

4. Press ENTER. This displays the date in the american date
format and turns on the DATE LED.

NOTE
The date format is battery backed up. Shutting
off the power to the unit does not affect the date
format. It will remain as programmed until it is
reprogrammed.

The date, as well as the time, continues to run even when
power to the instrument is shut off. The reason for this is that
the clock’s power circuitry is backed up by battery BTlOl.

2-19

Setting or changing the date is as simple as selecting the date
format. For example, use the following procedure to set the
date in american date format for November 24.

1. Press PRGM. Selects program mode and displays Pro ?.

2. Press 1. Selects Program 1, turns off the DATE LED and

displays the following:

RUE I 171

3. Press ENTER. The american date format was selected in

the previous procedure. Pressing ENTER displays the date

in the american date format and turns on the DATE LED.

4. Press 1, 1,2,4, ENTER. This action programs the date for

- November 24 and displays the following:

I

I PY

2.9.3 Program 2 Relay Settle Time

This displayis shown is seconds. The minimum settle time

is 000.005 seconds and the maximum settle time is

999.999 seconds. The settle time is not affected by power
up. This is because the circuitry is backed up by battery
BTlOl.

Programming the settle time is a simple procedure. For exam­ple, use the following procedure to program the settle time to
001 .OlO seconds.

1. Press PRGM. Selects the program mode and displays
Pro 1.

2. Press 2. Selects Program 2 and displays the settle message
described in step 2 of the previous procedure. Then the
previously programmed settle time is displayed.

3. Press 0, 0, 1, 0, 1, 0, ENTER. This step loads 1.01 seconds

as the settle time on the display. Pressing ENTER pro­grams 1.01 seconds as the settle time and the Model 706

reverts to the channel mode at the previously displayed

channel.

Program 2 is used to program the amount of time
(000.005sec to 999.999sec) the relays and all the measure-

ment equipment connected to a particular channel has to set­tle out. Do not confuse the settle time with the interval time.
The interval time is the selected time a relay is closed in a
scanning sequence. The interval time overrides the settle
time. That is, if the settle time is set to two seconds and the
interval time is set to one second the scan sequence will
operate at one second interval rate.

Therefore, the settle time must always be shorter in duration
than the interval time.

At the end of the programmed settle time the Model 706 out­puts a negative going, lTL level pulse with a duration of
greater than 1Opec. This pulse appears at the CHANNEL
READY output. The CHANNEL READY output is BNC con­nector located at the rear panel of the Model 706. The pur­pose of the settle time program is to have a selectable settle

.time for all instruments connected to a particular channel.

Then the pulse that appears at the CHANNEL READY output
can be used to inform another instrument (e.g. DMM, printer
or even the Model 706) that the settle time is complete.

To initiate Program 2 use the following procedure:

1. Press PRGM. This selects the program mode and displays
Pro 1.

2. Press 2. Selects Program 2 and displays the following for
approximately 0.5 seconds.

,

SEttlEl

After the settle message is displayed, the Model 706

displays:

NOTE

Initiating a new interval time resets the settle
time counter. If the settle time is greater than the
interval time the CHANNEL READY output
pulse does not appear upon the completion of a
scanning sequence.

2.9.4 Program 3 Set IEEE Primary Address
Program 3 is used to set the primary address of the Model

706 for IEEE-488 bus operation. The primary address of the

Model 706 is factory set to 18, but it may be set to any value

between 0 and 31 via front panel Program 3. This is a conve­nient feature that eliminates the cumbersome rear panel swit­ches that are generally used in other instruments to set
primary address.

The primary address specified in the controller’s programm-

ing language must agree with the primary address of the
Model 706. Front panel Program 3 is the only way to change

the Model 706’s primary address.

NOTE
If other instrumentation is connected to the bus,
be sure that each device has a different primary
address. If the precaution is not observed, er­ratic operations may result.

To initiate Program 3 and change the primary address to 22
use the following procedure:

1. Press PRGM. Selects the program mode and displays
Pro 1.

2. Press 3. Selects Program 3 and displays the following:

2-20

where:

IE = IEEE Indicator
18 = Primary Address

Press 2,2, ENTER. This step loads the number 22 onto the

3.
display. Pressing the ENTER button programs the primary

address to 22 and reverts the Model 706 to the channel

mode at the previously displayed channel.

4.

Press PRGM, 3. This step shows the user that the primary

address has indeed changed to 22.

Now that you know how, change the primary address

5.

back to 18.

2.9.5 Program 4 Save Relay Set Up
Program 4 is used to save (store) the present relay set up for

future use. This program is capable of storing 75 separate
relay set ups. This means the user can program 75 different
relay set ups, store the set ups, then use the stored set ups

when the need arises without reprogramming.

Program 4 is very useful in a situation where the instrument
and/or experiment is going to be shut down for a period of
time and the user does not want to reprogram the relay set up
when power is returned to the unit. The program is also

helpful when the user has programmed one relay set up and

needs to go to another completely different set up without
destroying or losing the existing set up. In this case it’s possi­ble to program one relay set up and store it with Program 4,
then program a different set up and store it with Program 4.
This way the user has both relay set ups stored for further
use.

NOTE
The Model 706 can only use one relay set up at a
time, they cannot be used simultaneously.

Model 706 to channel 9 and closes it.

10. Press PRGM, 4. Selects program mode, selects Program
4 and displays the following:

11.

Press 1, ENTER. Select the relay set up 1 to be stored and
when ENTER is pressed the set up is stored in location
SAVOl . The display is then reverted to the channel mode
at the previously displayed channel.

To verify that the relay set up has been stored use the follow­ing procedure:

1. Press RESET. Reset to the programmed first channel and
opens all relays.

2. Press PRGM, 5. Selects program mode and also Program

5.

3. Press 0, 1, ENTER. Selects location 01 and recalls the set
up.

4. Press CHANNEL nine times and notice that the odd
numbered channels are all closed and the even numbered
channels are all open. This verifies that relay set up was
indeed stored using Program 4.

For another test of the relay set up, shut off power to the

Model 706 for a few minutes. Turn the instrument back on
and press PRGM, 5,0, 1, ENTER. Notice that the odd chan­nels are closed and the even channels are open. Thus, even
when power to the instrument was shut off the relay set up
remained in memory.

To store an additional relay set up, program the set up and

press PRGM, 4, 0, 2, ENTER. This action saves the relay set
up without disturbing the previously stored set up. This can
be done with up to 75 separate set ups.

As an example of using Program 4, program the Model 706
for 10 channels with the odd numbered channels closed and
the even numbered channels open. When the set up is com-

plete, save the set up by using Program 4. Use the following

procedures to implement this example:

1. Press RESET. Selects the channel mode and reverts the
instrument to the programmed first channel.

2. Press 0, 0, 1, FIRST. Selects channel 1 as the first chan­nel.

3. Press 0, 1, 0, LAST, Selects channel 10 as the last chan­nel.

4. Press RESET. Reverts to the programmed first channel.

5. Press CLOSE. Closes presently displayed channel.

6. Press CHANNEL, CHANNEL, CLOSE. Advances the
Model 706 to channel 3 and closes it.

7. Press CHANNEL, CHANNEL, CLOSE. Advances the
Model 706 to channel 5 and closes it.

8. Press CHANNEL, CHANNEL, CLOSE. Advances the
Model 706 to channel 7 and closes it.

9. Press CHANNEL, CHANNEL, CLOSE. Advances the

The factory set values of Program 4 are all channels open and

channel 1 is the programmed first and last channel.

NOTE
Program 4 saves the entire relay set up program­med on the Model 706. It does not save just the
relay set up between the programmed first and
last channels. Program 4 also works in the
matrix mode.

2.9.6 Program 5 Recall Relay Set Up
Program 5 is used to recall a previously stored relay set up.

Program 4 and 5 work in conjunction with each other. Pro­gram 4 is used to store a relay set up while Program 5 is used
to recall the relay set up that was stored using Program 4.

Program 5 also recalls the programmed first and last channels
along with the relay set up that was stored in the example of

Program 4.
In the example of Program 4, 10 channels were selected with

the odd channels closed and the even channels open. The set

2-21

up was stored and then the Model 706 was reset by using the
RESET button. This is the point where we will start the exam­ple of Program 5. To recall the stored relay set up, use the

following procedure:

1.

Press RESET. Reverts instrument to programmed first
channel and opens all channels.

2.

Press PRGM, 5. Selects program mode and also Program

5. After the 5 button is pressed the Model 706 displays the

following:

2.9.7 Progra! 6 Pole Configuration
Program 6 is used to program the desired number of

measurement poles or to select the matrix mode.
Measurement Poles-The Model 706 permits either 1,2 or

4-pole measurements. Table 2-18 contains a list of the dif­ferent scanner cards and which pole configuration to use

with each scanner card.

/I

This display indicates that the recall program has been

activated. The display prompts the user for the specific

_ relay set up that is stored (1 through 751.

3. .Press 0, 1, ENTER. Selects relay set up number 1 to be
recalled and when ENTER is pressed the set up is recalled.

After ENTER is pressed, the Model 706 recalls relay set up
number 1 and displays the channel that was shown
previous to pressing PRGM. In this case, the following is

displayed because step 1 reset the display to the program-

med first channel.

1 ..-.:

In order to verify that the stored set up was recalled pro-

ceed to step 4.

4.

Press CHANNEL nine times and notice that the odd
numbered channels are closed and the even numbered
channels are open. This shows that the stored relay set up

was indeed recalled by Program 5.
The factory set values of Program 5 are all channels open

and the programmed first and last channels are set to 1.

Program 5 also works in the matrix mode, refer to

paragraph 2.9.13 for an example.

Table 2-16. Scanner Card Pole Configuration

Scanner Pole Configuration .

Card
7052 0 pole (Matrix)

7053 2 and 4 pole

._

The l-pole configuration can be used by operators who need
to switch just one (HI) side of their configuration. The 2-pole
configuration can be used for normal measurements. The
Cpole configuration can be used for 4-terminal ohms or a
switched HI, LO COM and Guard measurement. The matrix
mode (O-pole on the Model 706) can be used to switch any
one point to another.

The pole configuration is displayed by activating Program 6.
The pole configuration can be changed by activating Pro­gram 6 and pressing the desired number (0, 1,2 or 4). For ex­ample, use the following procedure to change the present
pole configuration to 4.

1. Press PRGM, 6. Selects Program 6 and displays the
fallowing:

7054 2 pole
7056 1,2or4pole

7057A

7058 2 pole
7059 2 pole or 4 pole

to Use

2 pole

In the matrix mode of operation pressing the START/STOP
button displays the Recall display along with the present
memory location. Pressing the START/STOP button in the
matrix mode and while the recall display is shown, advances

the instrument to the next memory location. Pressing the

CHANNEL button while the recall display is shown, selects

the channel display mode. By repeatedly pressing the CHAN-

NEL button the crosspoints of that memory location are
displayed. If in the inspect mode, all the closed crosspoints
can be displayed (one at a time, not simultaneously). Refer to
paragraph 2.9.13 for inspect mode information.

Pressing the START/STOP button repeatedly to advance
through the stored memory locations is an easy way to locate
a desired memory location. This procedure will go through all
the stored locations up to location 75 or to where a memory
location has been cleared (Program 94Ior to the last stored
memory location and then loop back to memory location 01.
If memory location 01 was cleared using Program 94, attemp­ting to recall the location is not valid and cannot be recalled.
This is true for all the locations.

2-22

/ PUlE 21

NOTE

Upon the actuation of front panel Program 99,

the Model 706 sets the pole configuration to 2.

Power up does not affect the pole configuration.

2. Press 4, ENTER. Loads 4 onto the display and when
ENTER is pressed, the pole configuration is set to 4. The
Model 706 then reverts to the channel mode, turns on the

channel LED and dislays the programmed first channel.

NOTE
Before pressing the ENTER button in step 2, the
Model 706 ignores the entry of any invalid

number (3, 5, 6, 7, 8, 9) for this program.

To verify that the pole configuration was changed to 4, press
Program 6, and the display shows that it was changed to 4.
Now change the pole configuration to 2. This can be done by

activating front panel Program 99 or by using the following
procedure:

1. Press PRGM, 6.

2. Press 2, ENTER.
In the l-pole mode the display is slightly different as shown in

the following display.

1

2

I.

-ROWS

3

r-nlnrq ~~-

The additional display digit is due to the fact that up to 200
channels may be realized in the l-pole mode. This only works

with the Model 7056 general purpose scanner card.

Matrix Mode-Using

with the Model 706 requires that the matrix mode be ac­tivated.The matrix mode precludes the use of the continuous

or single scan modes. The matrix mode can only be used in
the step scan mode. To activate the matrix mode use the
following procedure:

1. Press PRGM, 6. Selects program mode and Program 6.

2. Press 0, ENTER. Selects matrix mode.

After the ENTER button in step 2 is pressed, the Model
706 is placed in the matrix mode and the following is
displayed:

where the format is as follows:

where:

nnn = Three digit number displaying the column. Where

there can be a total of five columns per card, 10 cards per
706, five daisy chained 706’s maximum. This can be a

maximum of 250 columns.
m = The row from 1 to 4.
o or c = The crosspoint is either opened or closed.

the Model 7052 matrix scanner card

I uu I Id

nnn m 0 or C

I

4

’

123451

-lj

&-&

& k
,5&,

L---J

Figure 2-5. Model 7052 Matrix Scheme

3 Denotes row #3.

c Denotes the crosspoint is closed.

Therefore,the display 004 3 c means that the crosspoint of

unit #l, card #l, column #4, row #3 is closed.

Example

which would be 10 Model 7052 matrix cards with jumpers in­stalled between the rows of each card.- A matrix display could

be as follows:

2-For another example, consider a 4 x 50 matrix

COLUMNS

A TYPICAL CROSSPOINT ON THE
MODEL 7052 MATRIX CARD

MI6

t FORM A RELAY AS SHOWN.

CONSISTS OF A 3-POLE

I CJW Ycl

where:
048 Denotes unit #l (001 through 050 denotes unit #l).
048 Also, denotes card #lO of unit #l (046 through 050

denotes card #lO of unit #l).

048 Also, denotes column #3 of card #lo of unit #l (046

through 050 denotes columns of card #lo of unit #l).
4 Denotes row #4.
c Denotes the crosspoint is closed.

The matrix mode displays crosspoints instead of channels.

Crosspoints consists of the junction of one row with one col­umn. On each Model 7052 matrix card there are five columns

and four rows. Refer to Figure 2-5.

Example l-For

consider the following:

an example of a matrix crosspoint display

UUY 34

where:
004 Denotes the #l (001 through 050 denotes unit #lI.

004 Also, denotes card #l of unit #l (001 through 005

denotes card #l of unit #l).

004 Also, denotes column #4 of card #l of unit #l (001

through 005 denotes the columns of card #l of unit HI.

Therefore, the display 048 4c in a matrix means that the
crosspoint of unit #l, card #lo, column #3, row #4 is closed.

Example

which would be 10 Model 7052 matrix cards with jumpers in­stalled between the columns of each card. A matrix display
could be as follows:

where:
043 Denotes unit #l (001 through 050 denotes unit #ll.
043 Also, denotes card #9 of unit #l (041 through 045

043 Also, denotes column #3 of card #9 of unit #l (041

2 Denotes row #2.
o Denotes crosspoint is open. \

~--AS another example, consider a 40 x 5 matrix

I

UY3

denotes card #9 of unit #l).

through 045 denotes columns of card #9 of unit #l).

rlo!

2-23

Therefore, the display 043 20 means that in a 40 x 5 matrix
set up the crosspoint of unit #l, card #9, column #3, row #2 is
open.

Refer to Figure 2-6, Table 2-19 and Table 2-20 for further
clarification of the matrix mode display.

DENOTES COLUMNS

DENOTES CARD

DENOTES SLAVE

IS CLOSED

Figure 2-6. Matrix Display Clarification

Table 2-19. Matrix Unit Number Display Assignment

Unit Number Display Assignment

Master

001 through 050

Slave #l 051 through 100
Slave #2 101 through 150
Slave #3 151 through 200
Slave #4 201 through 250

l-Pole Mode-The l-Pole mode is available on the Model
7056 scanner card. On the card, relay Kill is the output relay
for the even channels and relay K112 is the output relay for
the odd channels. These relays close when the appropriate
channel relays close. In the l-pole mode, each channel relay
on the Model 7056 scanner card controls two channels. This
is because each relay is a 2-pole relay. For example, if the
channel 1 relay is closed, then the channel 2 relay is also
closed because they are the same relay. The closed channels
do not reach the output unless the appropriate output relay is
closed.

In some situations this may close channels that are not pro­grimmed as closed. For example, if channel 1 and 4 are pro­grammed as closed, then because of the scanner card’s ar­chitecture channels 2 and 3 are also closed. Refer to the
following chart.

Table 2-20. Matrix Card Number Display Assignment

l-Pole

Nomenclature

2-Pole

Nomenclature

J

Channel 1 = Channel 1 Relay + Output Relay K112
Channel 2 = Channel 1 Relay + Output Relay Kill
Channel 3 = Channel 2 Relay + Output Relay K112
Channel 4 =

I, ,r ,I ,t ,I ,I tt I, tt

Channel 2 Relay + Outbut Relay Kill

I,

Channel 19 = Channel 10 Relay + Output Relay K112

Channel 20 = Channel 10 Relay + Output Relay Kill

2.9.6 Program 7 Set Alarm Time

Program 7 is used to set the alarm time. The alarm time is the
preprogrammed time that the Model 706 outputs a negative
going lTL level pulse with a duration of greater than lO@ec
at the ALARM/SERIAL IN connector. The ALARM/SERIAL
IN cQnnector is located on the rear panel of the Model 706.

The alarm pulse can be used to inform another instrument to
start a measurement sequence. The external instrument (e.g.
controller, DMM, printer, etc.) can then start on its own
function in the measurement system. The alarm time is
displayed as a 24 hour clock format. The display format is as
follows:

uauauul

I

I

For an example of setting the alarm time, use the following
procedure to program the alarm time for 2:45 pm.

1. Press PRGM, 7. Selects Program 7 and displays the follow­ing message for approximately 0.5 seconds.

r---mrq

After the alarm message is displayed, the 24 hour clock
format is displayed. If the alarm time was not previously
programmed the alarm time is set to all zeroes. When the
time is set to 00.00.00 no output pulse will appear on the
ALARM/SERIAL IN connector.

2. Press 1, 4, 4, 5, 0, 0, ENTER. Loads 14.45.00 onto the
display and when ENTER is pressed the alarm time is set to

2:45 pm. The Model 706 then reverts to the channel mode
which turns on the CHANNEL LED and shows the

previously displayed channel.

,

.i

2-24

I I

Card #

1
2

3
4
5
6

3
9

10

Master

001-005

006-010
01 l-015

016-020
021-025
026-030
031-035
036-040
041-045
046-050

Di!

Slave #l

051-055
056-060
061-065
066-070
071-075

076-080

081-085

086-090

091-095
096- 100

‘lay Assign

Slave #2
101-105

106-110
111-115
116-120
121- 125
126-130

131- 135
136- 140
141-145
146-150

nent

Slave 13 Slavef4
151-155 201-205

156-160

206-210

161-165 21 l-215
166-170 216-220
171-175 221-225
176-180 226-230
181- 185

231-235
186- 190 236-240
191- 195 241-245

196-200 246-250

1

NOTE
The alarm time is now set to 2:45 pm. The alarm
pulse will appear at the ALARM/SERIAL IN
connector everyday at 2:45 pm until it is
reprogrammed, power is shut off or front panel
Program 99 is activated.

To verify that the alarm time was set to 2:45 pm by the

preceding example, press PRGM, 7. This action selects Pro­gram 7 and displays the previously stored alarm time. Upon
power up or upon activating front panel Program 99, the

Model 706 sets the alarm time to 00.00.00. When the alarm
time is set for 00.00.00, no output pulse appears at the
ALARM/SERIAL IN connector.

2.9.9 Program 8 Diagnostic Self Test

If the CRC reveals a problem with the ROM circuitry the
Model 706 displays the following for approximately 0.5

seconds:

After this display the Model 706 displays the following:

I

fRI1 i

If the self test and the CRC both reveal a problem, the Model

706 displays the RAM and ROM error messages and then

displays the fail message.

When either test does not reveal a problem the Model 706
displays the following message which indicates that both
tests have passed:

Program 8 is used to run a test on the ROM, RAM circuitry
and also to test the front panel LEDs. This test is also per­formed in the power up sequence. If it is desired to run the
test without shutting power off to the unit, Program 8 can be
used. For example, if the user needs to run the self test but
does not want to reset the alarm time (alarm time is not bat­tery backed up) then Program 8 can be used. This way the
alarm time is not reset and the Model 706 RAM, ROM and
front panel LEDs are tested. Use the following procedure to
activate Program 8.

1. Press PRGM. Selects program mode.

2. Press 8. Initiates the Program 8 test sequence.
Once step 2 is completed the Model 706 performs the follow-

ing sequence:
First, the Model 706 turns on all the segments in the display

and also turns on the CHANNEL, INTERVAL, CON-

TINUOUS, SINGLE, START/STOP, TIME, DATE, TALK,

LISTEN and REMOTE LEDs. The turned on display segments
are shown as follows:

This is a display test. The operator can note inoperative

display segments by comparing the Model 706 display with

the preceding figure. In addition, the push button and the
TALK, LISTEN and REMOTE LEDs turn on. All LEDs are

turned on simultaneously if operating correctly. While all the
LEDs are on, the Model 706 is performing a cyclic rundun­dancy check (CRC) of the ROM circuitry. A digital self test of

the RAM circuitry is also performed at this time. If the digital

self test reveals a problem with the RAM circuitry the Model

706 displays the following for approximately 0.5 seconds.

r

I

After this display the Model 706 displays the following:

I-H

I

PRSS I

After the pass message the Model 706 reverts to the

previously shown display. For example, if the Model 706 was
set to 01 F o then that is the display it will revert to after the
pass message.

2.9.10 Program 90 Stand Alone

Program 90 is used to program a Model 706 out of the master
and slave programs (Programs 91 and 92 respectively) into
normal front panel operation. Once Program 90 is activated
the Model 706 operates as a stand alone instrument. This
means that even if it is connected in a daisy chain configura­tion the Model 706 will not be the master control or a slave in
the configuration. To activate Program 90 use the following
procedure:

1. Press PRGM. Selects program mode.

2. Press 9, 0. After pressing the 0 button the Model 706

displays the following two messages and reverts to the
channel mode. The CHANNEL LED turns on, the pro­grammed first and last channels are set to 1 and channel 1
is displayed.

NOTE
After actuating program 90 cycle power to the
instrument or activate Program 99 in order to set
the ALARM/SERIAL IN connector to alarm out­put.

2.9.11 Program 91 Master
P.rogram 91 is used to set the Model 706 as the master control

of a daisy chain configuration. The designated master Model

706 is the only unit in a daisy chain configuration that has
front panel control. All operation in a daisy chain configura­tion is controlled from the master Model 706.

FR /I

i

L

,

If the Model 706 is not connected in a daisy chain configura-

tion, or the other daisy chained Model 706 scanners are not

programmed as slaves, activating Program 91 produces the

following two messages:

I n cl 1 0 0 P I (No Loop1

L

The Model 706 will remain in the no loop display condition

until all other daisy chained Model 706s are connected and
programmed as slaves or any front panel program other than

91 is activated.
To activate Program 91 use the following procedure:

1. Connect the Model 706 to at least one other Model 706 in
a daisy chain configuration. See Figure 2-4.

2. Install the appropriate scanner cards.

3. Turn the units on.

4. Select all but one Model 706 as the slave(s) of the con­figuration.

5. Press PRGM, 9, 2 of the selected slave unit(s).

6. Press PRGM, 9, 1 of the selected master Model 706.

The following message is displayed upon pressing 1.

After the control display, the Model 706 reverts to the chan­nel mode and displays the programmed first channel. At this

point the Model 706 is programmed as the master control of
the daisy chain configuration. To program the Model 706 for
a relay configuration, refer to paragraph 2.5.3. The only dif­ference is the extended number of channels provided by the
daisy chain configuration.

To program the master Model 706 out of the master condi­tion activate Program 90.

2.9.12 Program 92 Slave

Program 92 is used to set the Model 706 as a slave unit in a
daisy chain configuration. The slave unit(s) respond to the
commands of the designated master control unit in the con­figuration. The slave unit or units do not have any control in
the set up, except power on/off, Programs 90 and 91. The
slave unit’s primary function is to increase the number of
channels in a daisy chain configuration.

To activate Program 92 use the following procedure:

1. Connect the Model 706 to at least one other Model 706 in
a daisy chain configuration. See Figure 2-4.

2. Install the appropriate scanner cards.

3. Turn the units on.

4. Select a unit(s) as the slave(s).
NOTE

Select any Model 706 to be a slave in the daisy

L

chain configuration except the Model 706 that is
designated as the master.

5. Press PRGM, 9, 2 of the selected slave unit(s). The follow­ing message is displayed upon pressing the number 2.

I SLFWE I

I

The display message remains on the display as long as the

unit is programmed as a slave unit. To program the Model
706 out of the slave configuration condition one of the
following actions can be used.

1. Activate front panel Program 90.

2. Activate front panel Program 91.

2.9.13 Program 93 Inspect Mode

Program 93 is used to examine a relay set up. Examination of

a relay set up means that the closed channels of the set up

are displayed but not closed. While in the inspect mode

pressing the CHANNEL button advances the display to the

next closed channel, or if in the matrix mode, the next closed
crosspoint. In the inspect mode, only the closed channels or
crosspoints are displayed.

NOTE

In the inspect mode the relays are not closed,

they are just examined.

Program 93 is a convenient feature that allows the user to ex-

amine the closed channels of a relay set up. If Program 93 is
not used and the user needs to exaniine the relay set up, the
user must go through all the programmed channels or cross­points. With Program 93 activated the user can display the
closed channels or crosspoints of the set up. To activate and
then deactivate Program 93 use the following procedure:

1. Press PRGM, 9, 3. This step activates the inspect mode.
The inspect mode can be activated regardless (except

slave model of what mode the Model 706 was in. Note, on

the Model 706 display, that the middle decimal point is
blinking. This signifies that the inspect mode has been ac­tivated. The following is displayed for approximately 0.5
seconds and then reverts to previous display.

I I n 5 I? E c t I (Inspect)

2. Press PRGM, 9, 3. While the inspect mode is activated
pressing PRGM, 9, 3, takes the Model 706 out of the in­spect mode. The following is displayed for approximately

0.5 seconds and then reverts to the previous display.

,

I

6 E k o u k I (Get out)

Program 93 acts as a toggle. When the Model 706 is not in

the inspect mode pressing PRGM, 9, 3, activates the inspect

mode. While the Model 706 is in the inspect mode pressing
PRGM, 9,3, takes the Model 706 out of the inspect mode.

Using Program 4 and 5 in conjunction with Program 93 allows

the user to store, recall and inspect up to 75 different relay set

ups. The

spect three different

matrix

f&owing

example will program. store,

relay set ups a\\ of which are in the

recalland in-

mode. Programs 4, 5 end 43 will be used throughout

the exampie,

I.

Press RESET. Reset the Model 706.

2.

Press PRGM, 9, 3. Activates the inspect mode and

displays the following for approximately 0.5s~.

I InsPEEtl

,

J

After the inspect display, the Model 706 reverts to the
previously displayed channel or crosspoint with the blink­ing decimal point.

3.

Press PRGM, 6, 0, ENTER. Activates matrix mode.

4.

Press 0, 0, I, 1, CLOSE. Closes crosspoint 003

5.

Press 0, 0, 2, 2, CLOSE. Closes crosspoint 002

6.

Press 0, 0, 3, 3, CLOSE. Closes crosspoint 003

7.

Press PRGM, 4,O, 1, ENTER. Stores the present relay set

1 c.
2 c.
3 c.

up in location 01.

8.

Press RESET. Resets Model 706.

9.

Press 0, 0, 1, 2, CLOSE. Closes crosspoint 001

10.

Press 0, 0, 2, 3, CLOSE. Closes crosspoint 002

11.

Press 0, 0, 3, 4,

12.

Press PRGM, 4,0, 2, ENTER. Stores the

up in location 02.

53.

Press RESET. Resets

14.

Press 0, 0, 1,3,

15.

Press 0, 0, 2, 4, CLOSE. Closes crosspoint 002

16.

Press 0, 0, 3, 1, CLOSE. Closes crosspoint 003

17.

Press PRGM, 4,0,3, ENTER. Stores the present relay set

up

in [ocation 03.

18.

Press RESET. Resets the Model 706.

19.

Press PRGM, 5, 0, 1, ENTER. Recalls relay set

20.

Ptess CHANNEL, CHANNEL,

CHANNEL button while

the

display to the next closed crosspoint. When the last

CLOSE. Closes

the Mode) 706.

CLOSE.

Closes crosspoint 001

in

the inspect

crosspoint 003

present

CHANNEL.

mode advances

closed crosspoint of a set up is reached pressing

2 G.
3 c.

4 c.

relay set

3 c.
4 c.

1 c.

up 01.

Pressing tie

CHAN-

NEL displays the first closed crosspoint of the set up.

21.

Press RESET. Resets Model 706.

22. Press PRGM, 5,0, 2, ENTER. Recalls relay set up 02.

23. Press CHANNEL, CHANNEL, CHANNEL, CHANNEL.
Displays all the closed crosspoints of relay setup 02. Then
displays first closed crosspoint.

24. Press RESET. Resets

Model 706.

25. Press PRGM, 5, 0, 3, ENTER. Recalls relay set up 03.

26. Press CHANNEL,

CHANNEL,

CHANNEL, CHANNEL.
Advanced to and displays all the closed crosspoints of
relay set up 03. Then loops back to the first closed cross-

point.

27.

Press

PRGM, 9, 3. Takes the Model 706 out of the in-

spect mode

and displays get

LCW. .

I

out for H sec.

28. Press CHANNEL, CHANNEL, CHANNEL.

shows that when the Model 706
mode, pressing

next

channel whether it is

CHANNEL advances the display to the

open

is

out of the inspect

or

closed.

This

step

White in the in-

spect mode pressing CHANNEL advances the display

to the next closed crosspoint.

NOTE

Program

93 may

also

be

used

in

the

normal

mode (out of matrix). In the normal mode the
closed channels are displayed.

NOTE

fn ihe inspect mode, pressing CHANNEL ad­vances and displays the next closed channel or
crosspoint. The crosspoint or channef is NOT
CLOSED, it is just displayed for the user’s in­spection.

The preceding example has shown how to:

1. Activate Program 93 inspect mode {step 21.

2. Activate matrix mode Istep 31.

3. Program three relay set ups and store them using Program

4. (steps 4.171.

4.

Recall the stored relay

5.

Inspect

the closed crosspoints of the set up (steps 20, 23

set

ups (steps 19, 22 and 251.

and 261.

6. Take the Model 706 out of the inspect mode (step 271.

NOTE

Activating Program 99 or shutting off power to
the

Model

706 takes the instrument out of the

inspect mode.

2.9.14 Program 94 Clear

Program 94 is used to clear a

buffer location. A buffer

loca-

tion consists of a relay set up that was stored using Program

4. Up to 75 relay set ups can be stored and individually
cleared of data using Program 94. Use the following example
to:

rStore five relay set ups in location 1 thru 5.
aClear locations 3, 4 and 5 using Program 94.

1. Press PRGM , 4, 0, 1, ENTER. Selects Program
stores the present relay set up in location

01.

4 and

For simplici-

ty in this procedure the relay set up is all relays open.

2. Press PRGM,

stores

the present relay set up

ty in this procedure the relay set up is all

3.

Press

PRGM, 4,

4, 0, 2, ENTER. Seiects Program 4 and

in

location 02. For simplici-

relays

open.

0, 3, ENTER. Selects Program 4 and

stores the present relay set up in location 03. For simplici-

ty in this procedure the relay set up is all &ys open.

4.

Press

PRGM

4, 0, 4, ENTER. Selects Program 4 and
stores the present relay set up in location 04. For simplici­ty in this procedure the relay set up is all relays open.

_

2-27

5.

Press PRGM, 4, 0, 5, ENTER. Selects Program 4 and
stores the present relay set up in location 05. For simplici­ty in this procedure the relay set up is all relays open.

6.

Press PRGM, 9, 4. Selects Program 94 and displays the
following message.

This display informs the user that the clear program is ac­tivated and is presently at memory location 05.

7.

Press ENTER. Clears memory location 05 and returns to
the previously shown channel display.

a.

Press PRGM, 9, 4. Selects Program 94.

9.

Press 0, 4, ENTER. Clears memory location 04 and
returns to the previously shown channel display.

Press PRGM, 9, 4. Selects Program 94.

10.

11.

Press 0, 3, ENTER. Clears memory location 03 and
returns to the previously shown channel display.

After completing step 11 memory locations 3, 4 and 5 are
cleared. To verify that the locations have been cleared, ac­tivate Program 5 for locations 3, 4 and 5. Use the following

procedure to illustrate this.
I. Press PRGM, 5. Selects Program 5 recall.

2. Press 0, 5. Sets the instrument to recall memory location
05 and displays the following:

In the matrix mode, steps 1 thru 4 could be used differently.
After step 4 the user would press ENTER. This will display the
recall message. Now press START/STOP to advance
through the stored memory locations. In this example set ups

03, 04 and 05 are cleared. Therefore, pressing the START/

STOP button a few times shows that only set ups 01 and 02
exist. There could be more locations beyond location 05, but
using this method of the START/STOP button while in the
matrix mode, stops at the location where there is no location
and loops back to location 01.

To clear all the buffer locations press PRGM, 4, 0, 0.

2.9.15 Program 99 Reset

Program 99 is used to reset the Model 706 to the conditions
listed in Table 2-21. To activate Program 99 use the following
procedure:

1. Press PRGM. Selects program mode.

2. Press 9, 9. Initiates front panel Program 99.
Upon completion of step 2 the Model 706 goes through a

reset sequence that is described as follows:

Upon completion of step 2 the Model 706 responds by

1.

displaying the following message:

/

After the reset message, all front panel LEDs turn on for a

2.

period of time as shown in the following display.

3. Press ENTER. This step attempts to recall memory location

05. But when ENTER is pressed the instrument reverts to
the following display because memory location 5 has been

cleared.

4. Repeat steps I,2 and 3 for memory locations 3 and 4. This
will verify that the location have indeed been cleared.

NOTE

Program 94 is different from storing all relays
open in a memory location. Using Program 94 to
clear a memory location wipes out the location
altogether. Attempting to recall a cleared
memory location is not valid. The memory loca­tion (if it is needed) will have to be programmed
using Program 4.

The push button and TALK, LISTEN and REMOTE LEDs
also turn on at this time. During this time the Model 706
performs a cyclic redundancy check (CRC) of the ROM cir­cuitry and a digital self test of the RAM circuitry. Refer to

Program 8 for details on the ROM and RAM checks.

After all the front panels are turned on and then off, the

3.
Model 706 displays the current software revision level for

approximately 0.5 seconds. The following display is an ex­ample of software revision level Al.

I

After the software revision level is displayed the Model 706

4.
displays the primary address for approximately 0.5
seconds. The following display is an example of primary
address 18.

I

c

Once the primary address display is shown the Model 706
is in the Program 99 reset condition as defined by Table
2-21.

IE I81

A

1

2-28

Function or
Program

CHANNEL

Table 2-21. Program 99 Reset Conditions

Reset Condition

All channels are open and the display is set to*

TIME

DATE
RESET
INTERVAL
CONTINUOUS

Time is not affected by PROGRAM 99.

Date is not affected by PROGRAM 99.
Reset is not affected by PROGRAM 99.
Interval rate is set to 000.010.

Continuous scan mode is set to inactive.
SINGLE Single scan mode is set to inactive.
START/STOP Start/stop function is set to stop.
Program 0

Digital I/O outputs are set to 000, the inputs are

not affected by PROGRAM 99.
Program 1
Program 2
Program 3
Program 4
Program 5
Program 6
Program 7
Program

a

Program 90
Program 91
Program 92

Program 93
Program 94
Program 99
FIRST
LAST

Date is set to American date format.

Settle time is set to 000.005 seconds.

Primary address is set to 18.

Save relay set up is cleared.
Recall relay set up is cleared.
Pole configuration is set to 2.

Alarm time is set to 00.00.00.

Self test is not affected by PROGRAM 99.
PROGRAM 90 is performed.
PROGRAM 91 is not performed.
PROGRAM 92 is not performed.
PROGRAM 93 is disabled by PROGRAM 99.

PROGRAM 94 is set to inactive.
PROGRAM 99 is used to reset the Model 706.
Programmed first channel is set to I.
Programmed last channel is set to highest available
channel.

*When the Model 706 is in the slave mode IPROGRAM 921, activating

PROGRAM 99 has no effect.

j l&29/2-30 :

SECTION 3

IEEE BUS OPERATION

3.1 INTRODUCTION
This section contains information necessary to operate the

Model 706 over the IEEE-488 bus. The Model 706 has a stan­dard IEEE-488 interface that allows the user to give com­mands and read data via an external device. All front panel

programs and functions are available over the bus (except

Programs 3, 90, 91 and 92).

- -.

A typical bus set up for controlled operation is shown in

Figure 3-l. Generally, a system will contain one controller and
a number of other instruments to which the commands are
given. Device operation is categorized into three operators:
controlfer, talker and listener. The controller does what its
name implies; it controls the instruments on the bus. The
talker sends data while a listener receives data. Depending on
the type of instrument, any particular device can be a talker
only, a listener only or both a talker and a listener.

Any given system can have only one active controller, but
any number of talkers or listeners may be presented up to the
hardware limitations of the bus. Generally, the bus is limited
to 15 devices, but this number may be reduced if higher than
normal data transfer rates are required or if longer than nor­mal cables are used.

Only one device on the bus may be a talker at any given time
while several devices can be commanded to listen. Before a
device can talk or listen it must be appropriately addressed.

Devices are selected by their primary address. Usually, each
device on the bus has its own primary address so that each
device may be addressed individually. The primary address of
the Model 706 is factory set at 18. The factory set primary ad-

dress may be changed via front panel Program 3. For more in-

formation concerning front panel programs refer to
paragraph 2.9.

Once a device is addressed to talk or listen, the appropriate
bus transactions take place. For example, if the Model 706 is

addressed to talk, it places the data string on the bus one

byte at a time. The controller reads the information and the
appropriate software can be used to direct the information to

the desired location.

3.1.1 Software Consideration
The most sophisticated computer in the world would be

useless without the necessary software. This basic require­ment is also true of the IEEE-488 bus, which requires the use
of handler routines as described in this section.

Before a controller can be used with the IEEE-488 interface
the user must make certain that appropriate handler software

is present within the controller. With the HP-85 computer, for
example, the HP-85 interface card must be used with an addi­tional I/O ROM, which contains the necessary handler soft­ware.

Other small computers that can be used as controllers have
limited IEEE command capability. The PET/CBM computers,

for example, are incapable of sending multiline commands

from BASIC, although these commands can be sent through
machine language routines. The capabilities of other small
computers depends on the particular interface being used.
Often, little software “tricks” are required to achieve the
desired results.

From the preceding discussion, the message is clear, make
sure the proper software is being used with the interface.
Often, the user may incorrectly suspect that a hardware pro­blem is causing fault, when it was the software that was
causing the problem all along.

3.1.2 HP-85 BASIC Statements

Many of the programming instructions covered in Section 3
use examples written in Hewlett-Packard Model 85 BASIC.
The HP-85 was chosen for these examples because it has a
large number of BASIC statements that control IEEE488
operation. This section covers those HP-85 BASK
statements that are essential to Model 706 operation.

A complete list of HP-85 BASIC statements is shown in Table
3-l. All the statements in the table have one or three digit
arguments that must be specified. The first digit is the HP-85
interface select code, which is set to 7 at the factory. The last
two digits of those statements that require a three digit argu­ment specify the primary address. Generally, only those com­mands that actually require an address to be sent over the
bus require that the primary address be specified in the
BASIC statement.

Those statements in the table with three digit arguments

assume that the primary address of the device is set at 18.
Other primary addresses require that the last two digits be set

to the corresponding value. For example, to send a GTL com-

mand to device 22, the following BASIC statement would be
used:

LOCAL 722

Some of the statements in the table have two forms; the ex-

act configuration used depends on the desired command. For
example, CLEAR 7 will cause a DCL to be sent while CLEAR
718 causes a SDC to be transmitted to device 718.

3-l ,

The third column of Table 3-l lists the mnemonics for the
command sequences. While most of these are covered
elsewhere, a few points should be noted. The ATN line is set
low by the controller if the data bus contains a multiline com­mand. This is indicated in the table by ANDing the ATN
mnemonic with the first command on the bus. For example,

ATN*GET means that ATN and GET are sent simultaneously.
Two commands not previously covered are MLA (My Listen

Address) and MTA (My Talk Address). These are ordinary

PCG (Primary Command Group) addresses sent by the HP-85
to facilitate bus opertion in some situations. The Model 706
will essentially ignore these commands (the Model 706 trig­ger; on MTA in the TO and Tl modes), but other devices may

require that MLA and MTA be present in the command se-

quence under certain circumstances.

NOTE

The HP85 address is set to 21 at the factory.

Since each device on the bus must have a

unique primary address, do not set the Model
706 to the controller’s address to avoid possible
conflicts.

3.1.3 Interface Function Codes
The interface function codes are part of the IEEE-488-1978

standards. These codes define an instrument’s ability to sup­port various functions and should not be confused with pro­gramming commands found elsewhere in this manual.

Table 3-2 lists the codes for the Model 706. These codes are
also listed for convenience on the rear panel of the intrument

near the IEEE connector. The numeric value following each
one or two letter code defines the Model 706 capabilities as
follows:

Table 3-1. HP-85 IEEE-488 BASIC Statements

1. SH (Source Handshake Function)-The ability for the
Model 706 to initiate the transfer of message/data on the

data bus is provided by the SH function.

2. AH (Acceptor Handshake Function)-The ability for the
Model 706 to guarantee proper reception of
message/data on the data bus is provided by the AH

function.

3. T (Talker Function)-The ability for the Model 706 to
send device-dependent data over the bus (to other
devices) is provided by the T function. Model 706 talker
capabilities exist only after it has been addressed to talk.

4. L (Listener Function)-The ability for the Model 706 to
receive device-dependent data over the bus (from other
devices) is provided by the L function. Listener function
capabilities of the Model 706 exist only after it has been
addressed to listen.

5. SR (Service Request Function)-The ability for the
Model 706 to request service from the controller is pro-

vided by the SR function.

6. RL (Remote-Local Function)-The ability for the Model

706 to be placed in the remote or local mode is provided

by the RL function.

7. PP (Parallel Poll Function)-The Model 706 does not
have parallel polling capabilities.

8. DC (Device Clear Function)-The ability for the Model

706 to be cleared (initialized) is provided by the DC func-

tion.

9. DT (Device Trigger Function)-The ability for the Model

706 to have its basic operation is provided by the DT
function.

10. C (Controller Function)-The Model 706 does not have
controller capabilities.

11. TE (Extended Talker Capabilities)-The Model 706 does
not have extended talker capabilities.

3-2

Statement

Action

ABORT10 7 Send IFC.
CLEAR 7
CLEAR

718

Send DCL.
Send SDC to device 18.

ENTER 718;AS Device 18 addressed to talk.

Data placed is A$.
LOCAL 7 Set REN False
LOCAL

718

LOCAL LOCKOUT 7

Send GTL to device 18.

Send LLO.
OUTPUT 718;AS Device 18 addressed to listen.

Transmit A$.
REMOTE 7 Set REN true.
REMOTE 718 Set REN true. Address device

18 to listen.

RESET 7 Send IFC, cancel REN.

SPOLL (7181 Address device 18 to talk.

Conduct serial poll.

TRIGGER 7

Send GET without addressing.

TRIGGER 718 Address device 18 to listen.

Send GET.

Bus Command Sequence

IFC

ATNaDCL
ATN*UNL;MTA;LAG;SDC
ATN@UNL;MLA;TAG;ATN;data

Rim
ATN*UNL;MTA;LAG;GTL
ATNeLL
ATNeMTA;UNL;LAG;Ay;data

REN

REN;ATN*UNL;MTA;LAG
IFC;REN;a

ATN.UNL;MLA;TAG;SPE;Am;
status byte;ATN*SPD;UNT
ATNaGET
ATN.UNL;MTA;LAG;GET

12. LE (Extended Listener Capabilities)-The Model 706
does not have extended listener capabilities.

Table 3-2. Model 708 Interface Function Codes

Code
SHl

AH1
T6

Interface Function

Source Handshake Capability
Acceptor Handshake Capability
Talker (Basic Talker, Serial Poll,

Unaddressed To Talk On LAG)

L4

Listener (Basic Listener, Unaddressed

To Listen On TAG)
SRI
RLl
PPO
DC1
DTI
co
El
TEO
LEO

Service Request Capability
Remote/ Local Capability
No Parallel Poll Capability
Device Clear Capability
Device Trigger Capability
No Controller Capability
Open Collector Bus Drivers
No Extended Talker Capabilities
No Extended Listener Capabilities

3.1.4 Model 706 Interface Commands
Interface commands controlling Model 706 operation are

listed in Table 3-3. Not included in the table are device­dependent commands, which are covered in detail in
paragraph 3.5.

3.2 IEEE-488 BUS LINES
As shown in Figure 3-1, the signal lines on the IEEE-488 bus

are divided into three groups; management, handshake, and
data lines. The management and handshake lines ensure that
proper data transfer and bus operation takes place while the
data lines handle the bus information. Each of the bus lines

are low (true).

TO OTHER DEVICES

ICOMPUTERJ

DATA BUS

TALK AND

>ATA BYTE
TRANSFER

CONTROL

Table 33. IEEE Command Groups

HANDSHAKE COMMAND GROUP

DAC = DATA ACCEPTED
RFD = READY FOR DATA
DAV=DATA VALID

UNIVERSAL COMMAND GROUP

ATN = ATTENTION

DCL = DEVICE CLEAR
IFC = INTERFACE CLEAR
LLO = LOCAL LOCKOUT

REN = REMOTE ENABLE
SPD = SERIAL POLL DISABLE
SPE = SERIAL POLL ENABLE

ADDRESS COMMAND GROUP

LISTEN: LAG = LISTEN ADDRESS GROUP

MLA = MY LISTEN ADDRESS
UNL=UNLISTEN

TALK: TAG =TALK ADDRESS GROUP

MTA = MY TALK ADDRESS
UNT = UNTALK
gmTh = fJJ-ER Tfil& AjI$!ESS

ADDRESSED COMMAND GROUP

ACG =ADDRESSED COMMAND GROUP
GET= GROUP EXECUTE TRIGGER
GTL= GO TO LOCAL
SDC= SELECTIVE DEVICE CLEAR

STATUS COMMAND GROUP

RQS = REQUEST SERVICE
SRQ= SERIAL POLL REQUEST
STB = STATUS BYTE
END = EOI

GENERAL

INTERFACE

UANAGEMENT

DlOl... 8 DATA I8 LINES)

BUS MANAGEMENT

Figure 3-l. Bus Structure

3.2.1 Bus Management Lines

The bus management group consists of five signal lines that
send certain single line bus commands and ensure an orderly
transfer of data. The five signal lines are:

1. ATN (Attention)-The state of the ATN line determines
whether information placed in the data bus by the con­troller is to be considered data or a command.

2. REN (Remote Enable)-Setting the REN line low (true)
sends the REN command and sets up the instrument on
the bus for remote operation. If REN is followed by the
primary address df the Model 706, then it will be the only
instrument to be placed in the remote mode.

3-3

REN Programming Example-The REN line is set low
(true) by the HP-85 when the following line is entered into the
HP-85.

REMOTE 718 (END LINE)

When the END LINE key is pressed the Model 706 is placed in
the remote and the front panel REMOTE LED is turned on.

3. IFC (Interface Clear)-The IFC command is sent by the

controller to set the Model 706 to the talk and listen idle
states. The instrument responds to the IFC command by
turning off the front panel TALK or LISTEN LEDs if the in-

_ strument was previously in one of those modes. To send

the IFC command, the controller only has to set the IFC

line true.

IFC Programming Example-Before demonstrating the
IFC command, turn on the front panel REMOTE and TALK
LEDs by entering the following statements into the HP-85.

REMOTE 718 (END LINE)

ENTER 718;AS (END LINE)

complete handshake sequence is shown in Figure 3-2. This

sequence handles information one byte at a time.

Once the data is on the bus, the source checks to see that

NRFD is high. At the same time NDAC should be low from
the previous byte transfer. Once the NRFD and NDAC lines
are properly set, the source sets the DAV line low. The NRFD

line goes low; the NDAC line then goes high once all the
devices on the bus have accepted the data. Each device

releases the NDAC line at its own rate, but the NDAC line will

not go high until the slowest device on the bus has accepted
the data.

After the NDAC line goes high, the source sets the DAV line

high indicating that the data is no longer valid. At this point,
the NF)AC line goes low. The NRFD line is released by each
device on the bus but does not go high until the slowest
device on the bus has released the line. The bus is now set to

repeat the sequence with the next data byte.
The sequence just described is used to transfer both data and

multi-line commands. The state of the ATN lines determines
whether the data bus contains data or commands.

The front panel TALK and REMOTE LEDs should now be on.
The IFC command may now be sent by entering the follow­ing statement into the HP-85.

ABORT10 7 (END LINE)

CLEAR 7 (END LINE)

After the END LINE key is pressed, the TALK LED turns off,
indicating the Model 706 is in the talk idle state. Note that the
remote mode is not cancelled.

4. EOI (End Or Identify)-The EOI command is used to iden­tify the last byte of a multi-byte transfer sequence.

5. SRQ (Service Request)-The SRQ line is set low (true) by
a device when it requires service. SRQ can be identified by

reading the status word.

3.2.2 Handshake Lines
The handshake group consists of three handshake lines

which operate in an interlocked sequence. The interlocked

sequence ensures reliable data transfer regardless of the

transfer sequence. The slowest device on the bus usually

determines the rate of transfer.

The three handshake lines are:

1. DAV (Date Valid)

2. NRFD (Not Ready For Data)

3. NDAC (Not Data Accepted)

The DAV line is controlled by the source. The NRFD and

NDAC lines are controlled by the accepting devices. The

DATA

DAV

NRFD

NDAC

I 1

I

I
I

I

I

DATA

TRANSFER

BEGINS

I
I

I

I

DATA

TRANSFER

ENDS

SOURCE

ACCEPTOR

Figure 3-2. Handshake Sequence

3.2.3 Data Lines
The IEEE-488 bus uses eight data lines that transfer data one

byte at a time. DlOl (Data Input/Output 1) through Dl08,
(Data Input/Output 8) are the eight data lines used to

transmit both data and multiline commands,and are bi-

directional. The data lines operate with low true logic.

3.3 SYSTEM SET UP PROCEDURE
There are two primary set up steps that prepare the system

for operation. The two steps are as follows:

1. Bus Connections-The Model 706 is connected to the
bus via the rear panel connector. It is a standard IEEE bus
connector. Maximum cable length for any device on the
bus is 20 meters. The Keithley Models 70083 and 70086

are ideal for connecting instruments to the bus. Figure 3-3
and 3-4 show the connector pin assignments and the IEEE
bus connector. The connector contact designation are
listed in Table 3-4.

CONTACT 13

CONTACT 1

CONTACT 24

CONTACT 12

Figure 3-3. Contact Assignments

Figure 3-4. Typical Bus Connector

Table 3-4. IEEE Bus Connector Contact Assignments

Contact
Number

1
2
3
4
5
6

;
9

10
11

-- 12
13
14

15

16

17
18

19

20
is:

23
24

IEEE-488
Designation

DlOl
Dl02
D103
D104
EOI (24)*
DAV
NRFD
NDAC
IFC

SRQ
ATN
SHIELD””
D105
DlO6
D107
Dl08
REN (24)”
Gnd, (6)”
Gnd, (71”
Gnd, (8)”
Gnd, (9)”
Gnd, (lo)*
Gnd, (ll)*
Gnd. LOGIC

Twe
Data

Data
Data
Data
Management
Handshake
Handshake
Handshake
Management
Management
Management
Ground
Data
Data
Data
Data
Management

Ground
Ground
Ground
Ground
Ground
Ground
Ground

*Numbers in parentheses refer to signal ground return of

referenced contact number. EOI and REN signal lines
return on contact 24.

**The cable shield is normally connected to contact ‘f2.

This shield should be connected to ground only at the
controller end to avoid ground loop

problems.

2. Primary Address Selection-The primary address must
be set to the appropriate value when using the Model 706
in the addressable mode. The primary address is selected
by front panel Program 3. For more information concern-

ing the primary address selection refer to paragraph 2.9.4.

3.4 BUS COMMANDS
The Model 706 may be given a number of special bus com-

mands through the IEEE-488 interface. This section briefly
describes the purpose of the bus commands which are
grouped into the following three categories:

1. Uniline Commands: Sent by setting the associated bus
lines low.

2. Multiline Commands: General commands are sent with
the ATN line low.

3. Device-Dependent Commands: Special commands that
depend on device configurations; sent with ATN high.

3.4~1 Uniline Commands
As stated previously, uniline commands are sent by setting

the associated bus line low (true). The five uniline (single line)
commands are:

1. ATN (Attention)-The ATN commands are sent when

the

information on the data bus is a universal or addressed
command. Universal and addressed commands are
described in paragraphs 3.4.2 and 3.4.4. When the ATN

line is high, the byte on the data bus is considered to be
data. The Model 706 responds to the appropriate universal
and addressed commands when the ATN line

is low and to

the device-dependent commands when the ATN line is
high, assuming it is properly addressed.

2. REN (Remote Enable)-The controller sends this com­mand to all devices on the bus when remote operation is
desired. The Model 706 responds by setting itself up for
remote operation as indicated by the front panel REMOTE

LED.

3. EOI (End Or Identify) - EOI is sent during the last byte of a
multiline transfer by setting the EOI line low. In this way,

the last byte is identified allowing variable length data
words to be transmitted. The Model 706 implements this
command when in the appropriate bus response mode as
stated in paragraph 3.5.4.

4. IFC (Interface Clear) -The IFC command sets the bus to a
known state by setting the IFC line low (true).

5. SRQ (Service Request)-The SRQ line is pulled low (true)
by an external device thereby informing the controller the

device requires service. The Model 706 implements this

command in the appropriate bus response mode as stated
in paragraph 3.5.5.

3.42 Universal Commands
The IEEE-488 universal commands are sent when the ATN

line is low (true). There are six universal commands and their

effect on the Model 706 operation is described as follows:

1. DCL (Device Clear)-The DCL command is used to clear
the Model 706, thereby setting it to a known state. Pro­gram memory is cleared of all previously stored data when
a DCL or SDC command is received. The buffer is set to
location one.

DCL Programming Example-Using front panel controls
close channels 1 through 5 on the Model 706 and select the
continuous program mode. Now enter the following
statements into the HP-85:

REMOTE 718 (END LINE)

CLEAR 7 (END LINE)

When the END LINE key is pressed after CLEAR 7, the Model
706 reverts to the power up default conditions which are
listed in Table 3-5. This means that all five channels that were
closed are now open and the instrument is in the step pro­gram mode. For the state of the other Model 706 parameters
refer to Table 3-5.

2. LLO (Local Lockout)-The LLO command is sent by the
controller to remove the Model 706 from the local
operating mode. Once the instrument receives the LLO
command all the front panel controls (except POWER
ON/OFF) are locked out. The REN bus line must be low
(true) before the instrument responds to a LLO command.

LLO Programming Example-This sequence is
automatically performed by the HP-85 when the following
statements are entered into the keyboard:

REMOTE 718 (END LINE)

LOCAL LOCKOUT 7 (END LINE)

When the END LINE key is pressed after the LOCAL

LOCKOUT 7 command, the front panel controls are inactive.

Press several of the buttons and notice that they have no ef-

Table 3-5. Power Up, DCL and SDC Default Conditions

p&win

.-.-WV

I

Poles
Display Channel
Close Channel
Display Mode
Date Format
First Channel
Prefix
Settle Time
Store
Debug Test
(ROM, RAM and LED test)
EOI (End or Identify)
Set Last Channel
SRQ
Open Channel
I/O Port
Program Mode
Alarm Time

Reset
Set Time
Trigger Mode

Ahmate Ch ltnl It

. ..-.,.....-- -.e.r--

Set Date
Interval Time
Terminator
Recall

I Value t Status

A2

6001

coo0

DO

EO

Fl

GO00

H00.005

I

Jl

KO

Ll

MOO0

Nl

0000

PO

QOO:OO:OO

2-pole Configuration

Display channel 1.

Close channel disabled.
Channel mode displayed.
American date format.

Set first channel, not affected.

Channel data trasmitted with prefix.

Settle Time =

Store is not affected.

Run debug test.

EOI is transmitted during last byte.

Set last channel, not affected.

No SRQ

Channel 1 is open.

All l/O outputs are set low.

Step program mode.

Alarm time is set to 0O:OO:OO and is

disabled.

R

Shh:mm:ss

T6

u

Vmm:dd

W

Y(LF1

2

Reset is not affected.

Time is not affected.

Start on external.
A!ternate output is not affected,
Date is not affected.

Interval time is set to 0OO:OlO seconds.

(CR1 (LF)

Recall is not affected.

000.005 seconds.

3-8

feet. This is, of course, because of the previous LLO com-

mand.

NOTE

To get the Model 706 out of the local lockout

condition send a GTL (Go To Local) command,
refer to paragraph 3.4.3 step 3.

3. SPE (Serial Poll Enable)-The serial poll enable sequence
is used to obtain the Model 706 status byte. Usually, the
serial polling sequence is used to determine which of
several devices has requested service over the SRQ line.
The serial polling sequence is conducted as follows:

_ ._c?. The controller sets the ATN line true.

B. The SPE command is placed on the bus by the con-

troller.

C. The Model 706 is addressed to talk.

D. The controller sets the ATN line false.
E. The instrument then places its status byte on the bus to

be read by the controller.

F. The controller then sets the ATN line low and places

SPD on the bus to end the serial polling sequence.

1. SDC (Selected Device Clear)-The SDC command per­forms the same functions as the DCL command except
that only the addressed device responds. The instrument

returns to the set conditions listed in Table 3-5 when
responding to an SDC command. The program memory
of the addressed Model 706 is cleared of all previously
stored data when an SDC command is received. In addi-

tion the buffer and the display pointers are set to location

1.

SDC Programming Example-Using front panel controls
close channels 1 through 10 on the Model 706 and select the
single program mode. Now enter the following statements in­to the HP-85.

. .

REMOTE 718 (END LINE)

CLEAR 712 (END LINE)

Notice that when the END LINE key is pressed after the

CLEAR 712 statement that the Model 706 did not respond to
the SDC because the command was sent with a primary ad­dress of 12. Now enter the following statement into the

HP-85.

SPE Programming Example-The HP-85 SPOLL state­ment automatically performs the serial polling sequence. To
demonstrate serial polling, momentarily power the unit down
and enter the following statements into the HP-85 keyboard.

REMOTE 718 (END LINE)

S=SPOLL (718) (END LINE1

DISP S (END LINE)

When the END LINE key is pressed after the S = SPOLL 718
statement, the computer performs the serial polling se­quence. When the END LINE key is pressed after the DISP S
statement the status byte value is displayed on the CRT. The
status byte has a value of 0 with this example because all the
bits are set to 0.

4. SPD (Serial Poll Disable)-The controller automatically
sends the SPD command on the bus to end the serial poll­ing sequence in SPE.

5. UNT (Untalkl-The controller sends the UNT command
to clear the bus of any talkers.

6. UNL (UnlistenI-The controller sends the UNL command
to clear the bus of any listeners.

3.4.3 Addressed Commands
Each of the addressed commands are sent to a specific

device on the bus. Each device is selected on the basis of its
primary address. The Model 706 responds to these com-

mands only if the primary address of the command is the

same as the primary address of the Model 706. All of the
following commands are implemented by addressing the

Model 706 to listen.

CLEAR 718 (END LINE)

When the END LINE key is pressed after the CLEAR 718
statement, notice that the instrument returns to the SDC

default conditions listed in Table 3-5. Note, that, the program
memory is cleared of previously stored data.

2. GET (Group Execute Trigger)-The GET command is
used to trigger devices to perform a specific action that
depends on device configuration. Although GET is con-

sidered to be an addressed command, many devices res-

pond to GET without being addressed. Using the GET
command is only one of several methods that can be used
ti start or stop the Model 706 program operation.

GET Programming Example-To help illustrate this exam­ple first set the Model 706 to a known state, such as the
default conditions. Enter the following statements to do this.

REMOTE 718 (END LINE)

CLEAR 718 (END LINE)

When the END LINE key is pressed after the CLEAR 718
statement the Model 706 reverts to the set conditions listed in
Table 3-5. Now enter the following statement into the HP-85
to place the instrument in the continuous program mode and
start on GET trigger mode.

OUTPUT 718;“PTTw” (END LINE)

Where P2 is the command to set the instrument into the con­tinuous program mode and T2 is the command to set the in-

strument to the start on GET mode. Now the instrument may

be triggered to start with the following statement:

’ 3-7’

TRIGGER 718 (END LINE)

After this statement is entered, the front panel
START/STOP LED turns on indicating the instrument has
been triggered. To stop the program operation enter the

following statements into the HP-85.

OUTPUT 718; “T3X” (END LINE)

TRIGGER 718 (END LINE)

Where T3 is the command to set the instrument into the stop
on GET mode. When the END LINE key is pressed after the

OUTPUT 718;“T3X” statement the program operation (scan­ning sequence) is stopped. When the END LINE key is press­ed after the TRIGGER 718 statement the START/STOP LED
goes out, indicating the instrument has received the trigger.

NOTE
Sending any valid command during a scanning
sequence STOPS THE SEQUENCE at the

presently displayed channel or crosspoint.

restored. Setting the REN line false with the LOCAL 7 state­ment will also take the instrument out of the remote mode.

3.5 DEVICE-DEPENDENT COMMANDS
The device-dependent commands allow the user to send the

Model 706 commands that perform the same operations as
the front panel controls switches except for POWER
ON/OFF. There are a number of commands that control
parameters which are not available from the front panel and
they are listed in Table 3-6. Each command is entered as an
ASCII character followed by a specific parameter that is sent
over the bus by the controller. The bus treats these com­mands as data in that the ATN line is high (false) when the
commands are transmitted.

Several commands may be grouped together. Before a com­mand or command string is executed, the ASCII character X
must be sent. Commands sent without an X (execute) are re-

tained within the command buffer until the execute character
is received.

The Model 706 also responds to the GET command without

addressing. This command is sent with the following HP-85
statement:

TRIGGER 7

3. GTL (Go To Local)-The GTL command is used to
remove the instrument from the remote mode. The REN
line MUST BE SET HI (FALSE) in order for the GTL com­mand to restore operation of the locked out Model 706
front panel controls.

&TL Programming Example-To illustrate this example
the Model 706 must first be placed in the remote and lockout
modes. To do this enter the following statements into the

HP-85:

REMOTE 718 (END LINE)

LOCAL LOCKOUT 7 (END LINE)

When the END LINE key is pressed after the LOCAL

LOCKOUT 7 statement the Model 706 front panel controls
are locked out. Check to see that the REMOTE LED is on and
the front panel controls are locked out. The GTL command
sequence is automatically sent by the HP-85 statement with
the following statement:

LOCAL 718 (END LINE)

Note, that the REMOTE LED on the front panel turns off, but
the front panel controls are still locked out. Front panel con­trol can now be restored by setting the REN line false with the
following statement:

The condition of the status word within the Model 706 is af­fected by the device-dependent commands. The status

word may be obtained from the unit by using commands
covered in this section. Refer to paragraph 3.7 for status
word information. Illegal commands do not change the
mode of the Model 706 but the status byte condition
changes as described in paragraph 3.6. Normal Model 706
commands are covered in the following paragraphs. All the
device dependent commands for the Model 706 are listed in
Table 3-7.

The Model 706 executes the programmed commands in the

order listed in Table 3-8. This means that if a statement is

entered into the HP-85 as follows:

OUTPUT 718; “PlW345DlX” (END- LINE)

The Model 706 executes the commands in the following

order according to Table 3-8.

1. Displays interval time (Dl).

2. Selects single scan mode (Pll.

3. Programs interval time for 3.5 seconds (W3.5).
There are three types of commands that make up the device-

dependent commands listed in Table 3-8. They are as
follows:

1. Independent Commands-Commands that do not interact
with each other.

2. Timer Commands-Commands that control the time and
date.

3. Channel Commands-Commands that directly affect the
channels.

LOCAL 7 (END LINE)

After executing this statement, front panel control is

Table 3-6. De&a-Dependent Commands Not Available to Front Panel

Command Definition

D Display Mode
G

Prefix

K EOI

M SRQ

T

U

Y

Trigger

Alternate Output

Terminator

Notes
D4 = Display Message

GO = Channel Data sent with prefix.
Gl = Channel Data sent without prefix.
G2= Buffer State sent with prefix, only

closed channels if in P3 mode.

G3 = Buffer State sent without prefix, only

closed channels if in P3 mode.
G4= I/O Port sent with prefix.
G5= I/O Port sent without prefix.
G6 = Time/Date sent with prefix.
G7 = Time/Date sent without prefix.
GB= Status Word sent with prefix.
G9 = Status Word sent without prefix.
G10 = Settle Time sent with prefix.
Gil = Settle Time sent without prefix.
G12=Alarm Time sent with prefix.

G13 = Alarm Time sent without prefix.
G14= Interval Time sent with prefix.
G15= Interval Time sent without prefix.
G16= First/Last sent with prefix.
G17= First/Last sent without prefix.
G18= Previous relay set up buffer location

sent with prefix.

G19 = Previous relay set up buffer location

sent without prefix.

KO = EOI transmitted on last byte out.
Kl = Send no EOI.

Mnnnn

TO = Start on Talk

Tl =Stop on Talk

M=Start on GET

T3=Stop on GET
T4 = Start, on “X”
T5 = Stop on “X’
T6 = Start on External
17 = Stop on External

UO = Channel
Ul = All Channels
u2= I/O
U3 = Date
U4 = Status
U5 = Settling
U6 = Alarm
U7 = Interval
U8 = First/ Last
U9 = Previously recalled buffer location.

YC

i -

Table 3-7. Model 706 Device-Dependent Commands

Command Definition

A

Set Number of Poles

Display Channel
:
D

E

Close Channel

Display Mode

Date Format

Set First Channel

L

H

I

Prefix

Settle Time
Save
Debug Test

ii

EOI
Set Last Channel

ii

N

0

P

Q

.

SRQ
Open Channel Nnnnn
I/O Port

Program

Set Alarm Time Qhh:mm:ss

Notes

A0 = Matrix Mode
Al = 1 -pole
A2 = 2-pole
A3 or A4 = 4pole

Bnnnn
Cnnnn
DO = Channel
Dl = Interval Time
D2 = Time
03 = Date
D4 = Display Message
EO = American Date Format
El = International Date Format
Fnnnn
GO=Channel Data sent with prefix.
Gl = Channel Data sent without prefix.
G2= Buffer State sent with prefix.
G3= Buffer State sent without prefix.
G4= l/O Port sent with prefix.
G5= I/O Port sent without prefix.
G6 = Time/Date sent with prefix.
G7 = Time/Date sent without prefix.
G8 = Status Word sent with prefix.
G9 = Status Word sent without prefix.
GlO = Settle Time sent with prefix.
Gil = Settle Time sent without prefix.
G12=Alarm Time sent with prefix.
G13 = Alarm Time sent without prefix.
G14= Interval Time sent with prefix.
G15 = Interval Time sent without prefix.
G16= First/Last sent with prefix.
G17 = First/Last sent without prefix.
G18 = Previous relay set up buffer location sent

with prefix.

G19 = Previous relay set up buffer location sent

without prefix.

Hnnn.nnn

II, 12, 13, 14, 15...175, IO clears all buffers.

JO = Run Debug Test

KO= EOI transmitted on last byte out
Kl = Send no EOI

Lnnnn
Mnnnn

Onnnn
PO = Step
Pl = Single
P2 = Continuous

P3 = Inspect Mode

P4= Disable Inspect Mode, return to previous

P mode.

3-10

Table 3-7. Model 706 Device-Dependent Commands

Command Definition

R
S

T

U

V

w

Y

Reset
Set Time
Trigger

Alternate Output

Set Date
Set !nterva! Time

Terminator

Z Recall

Notes

Opens all channels and displays FIRST channel.
Shh:mm:ss
TO = Start on Talk
Tl = Stop on Talk
X2= Start on GET
T3 = Stop on GET
T4= Start on “X”
T5= Stop on “x”
T6 = Start on External
l7 = Stop on External

UO = Channel
Ul = All Channels
u2=i/o
U3 = Date
u4 =

status

U5 = Settling
U6 = Alarm
U7 = Interval
U8 = First/ Last
U9 = Previously recalled buffer location.

Vmm:dd
Wnnnnnn

YC

Zl, 22, 23, 24, z5. ..z75

3-11

Table 3-8. Hierarchy of Command Execution

Command

D

P”

T”

G”

U”

J”
K”

M*

0*

Definition
Display Mode

Program

Trigger Modes

Prefix Modes

Alternate Output

ROM and LED Test
EOI

SRQ
I/O Port

Notes
DO = Channel

Dl = Interval Time
D2 = Time
D3 = Date

D4 = Display Message
PO = Step
Pl = Single
P2 = Continuous
P3 = Inspect Mode

P4=Disable Inspect Mode, return to previous

P mode.
TO = Start on Talk
Tl = Stop on Talk

T2= Start on GET
T3 = Stop on GET
T4 = Start on “X’
T5 = Stop on “X”
T6 = Start on External
17 = Stop on External
GO = Channel Data sent with prefix.
Gl = Channel Date sent without prefix.
G2= Buffer State sent with prefix.
G3 = Buffer State sent without prefix.
G4= I/O Port sent with prefix.
G5= I/O Port sent without prefix.
G6 = Time/Date sent with prefix.
G7 = Time/ Date sent without prefix.
G8 = Status Word sent with prefix.
G9 = Status Word sent without prefix.
GlO=Settle Time sent with prefix.
Gil = Settle Time sent without prefix.
G12=Alarm Time sent with prefix.
G13=Alarm Time sent without prefix.
G14= Interval Time sent with prefix.
G15= Interval Time sent without prefix.
G16i First/Last sent with prefix.
G17 = First/Last sent without prefix.

G18= Previous relay set up buffer location sent with

prefix.

G19= Previous relay set up buffer location sent

without prefix.
UO = Channel
Ul = All Channels
U2=I/O
U3 = Date and Time
u4 = status
U5 = Settling
U6 = Alarm
U7 = interval
U8 = First/ Last

U9 = Previously recalled buffer location.

JO= Run Debug Test

KO = EOI sent on last byte out.
Kl =Send no EOI
See Table 3-9
Onnn, where O=command n =0 to 377 octal

- I --=---

3-12

Table 3-8. Hierarchy of Command Execution

I

Command

E**

**

S

v**

**

Q

H”

W*

Y”
B*

I***

***

C

***

N
z***

FYY”

**+

L

***

A

RW,y+

Definition

Date Fromat

Time

Date

Alarm Time

Settle Time
Interval Time

Terminator

Channel
Channel Save

Close Channel
Open Channel

Channel Recall
Set First Channel

Set Last Channel
Set Number of Poles

Reset

*Independent Commands

**Timer Commands

***Channel Commands

Notes
EO = American Date Format

El = international Date Format
Set Time
Set Date
Set Alarm Time
Set Settle Time
Set Interval Time
IEEE Terminator Character
Display Channel

11,12,13,14,15...175 save a relay set up, IO clears all

buffers.

Close Channel
Open Channel
Zl, 22, 23, 24, Z5...275 recall a saved relay set up.

Overrides close.
Set First Channel
Set Last Channel
if changed First = 1 Last = last channel (100 to

500) and displays channel 1.
Opens all channels, displays first channel and
overrides close, open and recall.

3.5.1 Display Mode
The following five commands set the display mode for the

channel, time, date, interval or display message mode.

1. DO- The DO command sets the Model 706 for the channel
display mode.

2. Dl -The Dl command sets the Model 706 for the interval
time display mode. The interval time is the programmed
time the channel is closed. The interval time can be altered
by programming inputs, refer to paragraph 3.5.8.

3. D2-The D2 command sets the Model 706 for the time
display mode. The time in hours, minutes and seconds is
displayed, refer to paragraph 2.6 for time display format.

4. D3-The 03 command sets the Model 706 for the date
display mode. The date in month and day is displayed,
refer to paragraph 2.6 for date display format.

5. D4- The D4 command sets the Model 706 for the display

message mode. The display message mode allows the user

to display a customized message on the Model 706 scan-

ner’s front panel display.

Programming Example-To display and transmit the chan­nel data with a prefix and display the data on the HP%% CRT
enter the following program into the HP-85.

PROGRAM
10 REMOTE 718 (END

LINE)
20 CLEAR 7 (END LINE)
30 OUTPUT 718; “GODOX”

COMMENTS
Sets the Model 706 for the

remote mode.
Clear the Model 706.
Display channel mode on

706 display and send chan-

nel date with prefix.

40 ENTER 718;AS (END

Obtain data string.

LINE)

50 DISP A$ (END LINE)

60 END (END LINE)

Display data string.
End of program.

Alter typing in the program, press the RUN key on the HP-85
to run the program. After the RUN key is pressed the channel
data with a prefix is displayed on the CRT as follows:

coo01 ,so

This program can be used for any of the prefix commands

(Gl.
As another example we will illustrate the D4 (display

message) mode. Read the following paragraphs and do the
programming example.

3-13

The ASCII message is of course limited to the display of the
seven segment LEDs on the front panel of the Model 706.
The messages may be controlled with the following com-

mands:

1.

D4aaaaaaX-The command is D4 while the letter “a”
represents an ASCII character (up to 7 characters may be
sent),

2.

DO, Dl, D2 or D3-Takes the Model 706 out of the display
message mode. The Model 706 is placed into the display
mode that is programmed.

NOTE
For the following notes, refer to the display
numbering sequence shown:

NOTES

1.

The first character must be a plus ( + 1, minus (-1, decimal

point or a 1 or it will be ignored.

2.

Characters 2 through 7 will accept any displayable ASCII
character. Any character not displayable will appear as a
“d” segment. A “d” segment is shown as follows:

$/ 7 segment

The maximum number of characters that can be sent is 7.

3.
Programming Example-To display the message “use

single scan” enter the following program into the HP-85.

PROGRAM

10 REMOTE 718 (END LINE)

20 CLEAR 7 (END LINE)
30 OUTPUT 718; “D4 USE

X” (END LINE)
40 WAIT 1000 (END LINE)
50 OUTPUT 718; “D4

SINGLE X” (END LINE)

60 WAIT 1000 (END LINE)

70 OUTPUT 718; “D4 SCAN

X” (END LINE)

80 WAIT 2000 (END LINE)

90 GO TO 30 (END LINE)

100 END (END LINE)

Make sure there is a space in the program bet­ween D4 and the message. Otherwise, an erratic
display will result.

When the RUN key is pressed the Model 706 displays the

following message:

u 5E

COMMENTS
Set the Model 706 to

remote.
Clears the Model 706.
Displays USE on 706.

Wait one second.
Displays SINGLE on 706.

Wait one second.
Displays SCAN on 706.

Wait two seconds.

Go to line 30.
End of program.

NOTE

5fRn

i

/

Display operation may be restored by entering the following

statement into the HP-85:

OUTPUT 718; “DOX” (END LINE)

3.5.2 Program (Scan1 Mode
The following three commands set the Model 706 to the

Single, Continuous or Step mode.

PO-The PO command sets the Model 706 to the step scan

1

mode. The step scan mode permits the user to scan
through the programmed channels one at a time upon sen­ding the PO command (one channel scanned per PO com-

mand). in using the step scan mode over the bus the inter­val time must be greater than 70msec.

Pl -The Pl command sets the Model 706 to the single

2.
scan mode. The single scan mode permits one complete
scan of the programmed channels.

P2-The P2 command sets the Model 706 to the con-

3.

tinuous scan mode. The continuous scan mode permits a
continuous scan of the programmed channels.

P3- The P3 command sets the Model 706 to the inspect

4.

mode. The inspect mode is a convenient mode that allows
the user to examine the closed channels of a relay set up.
The P3 mode in conjunction with the G2 mode allows all
the closed channels of a relay set up to be outputted (e.g.

displayed on the HP-85’s CRT). While the Model 706 is in
the P3 mode the middle decimal point is blinking.

5. P4-The P4 command takes the Model 706 out of the in­spect mode and returns to previous P (scan) mode.

P3 Programming Example-The following example il­lustrates the P3 (inspect) mode. Using the front panel con­trols close the odd channels between 1 and 50. Then store
the set up in location 001. To illustrate this example type in
the following program into the HP-85:

PROGRAM

10 DIM AS [IO001 (END

LINE)

20 REMOTE 718 (END

LINE)

30 OUTPUT 718;“ZOlX”

(END LINE)

40 OUTPUT 718:“P3G2X” Selects the inspect mode and

(END LINE)

50 ENTER 718; AS (END

(END LINE)
60 DISP AS (END LINE)
70 END (END LINE1

After typing in the program, press the RUN key on the HP-85

COMMENTS
Defines AS.

Sets the 706 to remote.
Recalls relay set up in location

01.

the send buffer state with
prefix mode.
Obtains data string.

Display data string.
End of program.

,

3-14

to run the program. After the RUN key is pressed, the chan-

nels that are closed (odd channels 1 through 50) are displayed
with a prefix on the HP-85’s CRT. The display is shown as
foltows:

To take the Model 706 out of the inspect mode enter the
following statement into the HP-85:

OUTPUT 718;“P4X” (END LINE)

After the END LINE key is pressed the Model 706 is taken
of the inspect mode and the middle decimal point (706
display) stops blinking and goes out.

3.5.3 Prefix
Some commands may be sent with an identifying prefix or

without the prefix, they are listed as follows: Refer to

paragraph 3.5.1 for an example program.

1. GO-Sending the GO command transmits the channel
data with a prefix. The format is as follows:

+ Cnnnn,Sn

where

C = Present Channel
S = Status of Present Channel (0 = Open 1 = Closed)

2. Gl-Sending the Gl command transmits the channel
data without a prefix. The format is as follows:

nnnn,n

3. G2-Sending the G2 command transmits the entire
channel buffer state with a prefix. The format is as

follows:

COO01 ,Sn
C0002,Sn

.
.

Cnnnn,Sn

4. G3-Sending the G3 command transmits the entire
channel buffer state without a prefix. The format is as

follows:

OOO1,n
0002,n

.
0

nnnn,n

5. G4-Sending the G4 command transmits the status of
the I/O port with a prefix. The format is as follows:

I/Oiii,ooo

out

where
i=The input from 0 to 377 octal.
o = The output from 0 to 377 octal.

6. G5-Sending the G5 command transmits the status of
the t/O status port without a prefix. The format is as
follows:

7. GG-Sending the G6 command transmits the time and
date with prefix. The format is as follows:

Thh:mm:ss,Dmm:dd

8. G7-Sending the G7 command transmits the time and
date without a prefix. The format is as follows:

9. G8-Sending the G8 command transmits the status
word with a prefix. The status word format is covered in
detail in paragraph 3.7.

10. GS-Sending the G9 command transmits the status
word without a prefix. The status word format is
in detail in paragraph 3.7.

11. GlO-Sending the GlO command transmits the channel
settling time with a prefix. The format is as follows:

12. Gil -Sending the Gil command transmits the channel
settling time without a prefix. The format is as follows:

13. G12-Sending the G12 command transmits the alarm
time with a prefix. The format is as follows:

14. G13-Sending the G13 command transmits the alarm
time without a prefix. The format is as follows:

15. G14-Sending the G14 command transmits the interval
time with a prefix. The format is as follows:

16. G15-Sending the G15 command transmits the interval
time without a prefix. The format is as follows:

17. GlG-Sending the G16 command transmits the selected
first and last channel numbers with a prefix. The format
is as follows:

18. G17-Sending
first and last channel numbers with out a prefix. The for­mat is as follows:

19. G18-Sending the G18 command transmits

up location that was previously used with a prefix. For
example: if location 01 was the last recalled location,
then the statements:

the

OUTPUT 718; “G18X” (END LINE)

ENTER 728; A$ (END LINE)

DISP AS (END LINE)

. . .

111,000

hh:mm:ss,mm:dd

covered

Hnnn.nnn

nnn.nnn

Qhh:mm:ss’

hh:mm:ss

Wnnn.nnn

nnn.nnn

Fnnnn,Lnnnn

G17 command transmits the selected

nnnn,nnnn

the

relay set

3-15

Will produce a display on the HP85 of:

ROl

The format for the display is as follows:

Rnn

20. GlS-Sending the G19 command transmits the relay set
up location that was previously used without prefix. The
display is as follows:

nn

3.5.4 EOI (End or Identify)
The EOI line on the bus is usually set low by a device during

the last byte of its data transfer sequence. In this way, the last

byte is properly identified allowing variable length data words
to be transmitted. The Model 706 normally sends EOI during
the last byte of its data string or status word. The EOI

response of the instrument may be set with one of the follow-

ing commands:

1. KO-Send EOI during last byte.

2. Kl-Send no EOI.

NOTE

Upon power up the KO mode is enabled.

EOI Programming Example-The EOI response is sup-

pressed with the following HP-85 statement sequence:

REMOTE 718; (END LINE)

OUTPUT 718; “KlX” (END LINE)

3.5.5 Bus Response Mode (SRQ)
The bus response mode determines whether or not the Model

706 requests service from the controller through the SRQ
line. When the appropriate mode is selected, the instrument
generates an SRQ under the data or error conditions describ­ed as follows:

1. If the instrument receives an illegal device-dependent com­mand (IDDCI or illegal device-dependent command option
(IDDCO), or if the instrument is not in the remote mode
when programmed.

2. If the end of the buffer is encountered when running a pro­gram.

3. At the end of interval time.

4. Execution of timer alarm.

5. End of settle time.

6. Broken serial loop.

Upon power up or after a DCL or SDC, SRQ is disabled, the
bus response may be programmed as follows:

1. MO-No SRQ

2. Ml-M63-Send SRQ.

Refer to Table 3-9 for conditions that generate a SRQ.

NOTE
Upon power up, the MO mode is selected. The
SRQ byte is cleared on a read of the serial poll
byte.

Table 3-9. SRQ Commands and Conditions

l Woken*

rial Loop

End of*

Interval* End of* Timer* IDDC, IDDCO,”

Settle Time Time

Scan

Alarm

No Remote

3-16

Table 3-9. SRQ Commands and Conditions

SRQ Command

Broken”

Serial Loop

End of*

Settle Time

M22
M23
M24
M25
M26

M27

M28
M29
M30

M31
M32
M33
M34
M35
M36
M37
M38
M39
M40
M41
M42
M43
M44
M45
M46
M47
M48
M49
M50
M51

M52

M53

M54

M55

M56
M57
M58
M59
M60

M61

M62
M63

X
X
X
X
X
X
X
X
X
X
X
X
X
X

X

X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X

*Indicates conditions mat generate an SRQ.

**MO disables SRQ.

X

::

X

X

X
X
X
X
X
X
X
X
X
X
X

Interval*

Time

X

::
X
X

::

.

X
X
X
X
X
X
X
X

‘X

X
X
X
X
X
X
X

c

End of*

Scan

-­X

X

X
X

::

X
X
X
X

X
X

X

X

X
X
X
X

X
X
X
X

Timer*

Alarm

X
X

X
X

::

X
X

X
X

X
X

X
X

X
X

X
X

X
X

X
X

IDDC, lDDCO*

No Remote

X
X

X
X
X
X
X
X
X
X
X
X
X

X
X
X
X
X
X

X

X

+

SRQ Programming Example-The bus response mode may
be programmed as follows:

REMOTE 718 (END LINE)

OUTPUT 718; “Mix” (END LINE)

The SRQ format is as follows:

Mnnn

Where
M = Bus response mode.

n = 0 to 255 (base lo), in base 2 NNNNNNNN.

SRQ MASK

MSB

7 6

N/A 1= l=END 1 =END OF

N/A

SRQ BYTE

MSB

5

BROKEN OF INTERVAL OF T[MER
SERIAL SElTLE TIME
LOOP

4

TIME

3 2 1 1 0

l&ND 1= is
SCAN ALARM IDDC

LSB

IDDW.
OR NO

REMOTE

LSB

5. T4- In tliG T4 mode (Start on X) an execute command “x”
initiates the program mode sequence.

6. T5- In the T5 mode (Stop on X) an execute command ‘X”

stops the program mode sequence.

7. T6- in the T6 mode (Start on External) an external trigger

initiates the program mode sequence.

8. T7- In the T7 mode (Stop on External) an external trigger

stops the program mode sequence.

NOTE

The T modes may also be used in the matrix mode
to advance through the matrix set up. One trigger
command sent for every crosspoint.

Programming Example-Setthe instrument to its default con­dition by turning the unit off then on and enter the following
statements into the HP-85 keyboard:

REMOTE 718 (END LINE)

OUTPUT 718; “T2X” (END LINE)

After the END LINE key is pressed the second time, the instru­ment is placed in the start on GET trigger mode. When a GET
command is sent by the controller the Model 706 triggers. To
send a GET command, enter the following statement into the
HP-85.

TRIGGER 718 (END LINE)

SRQ Mask - in order to facilitate SRQ programming, the

Model 706 makes use of a mask when generating a SRQ.
When the appropriate bit in the mask is set, the instrument gen­erates a SRQ when those particular conditions exist. The SRQ
mask byte format is shown. Bits within the mask can be con­trolled by sending the ASCII character “M” followed by a deci­mal number from 0 to 63. Table 3-9 lists the conditions that
cause a SRQ for each command parameter. Note that the in­strument can be programmed for one or more conditions simul-

taneously.

3.5.6 Trigger Modes

Triggering is used to tell the Model 706 to initiate the program
mode sequence (single, continuous or step). The trigger stimu-

lus may come from commands sent over the bus, through the
external input or by the front panel START/STOP button. Trig­gering may be either to start the program mode sequence or
stop the sequence. The trigger modes are as follows:

1. TO - In the TO mode (Start on Talk) talk command initiates
the program mode sequence.

2. Tl - in the Tl mode (Stop on Talk) a talk command stops
the program mode sequence.

3. T2- In the T2 mode (Start on GET) a GET command initi­ates the program mode sequence.

4. T3 - In the T3 mode (Stop on GET) a GET command
stops the program mode sequence.

Programming Note - If the Model 706 is in the trigger mode
TO (Start on Talk), either of the following HP-85 BASIC state­ments will initiate a scan:

SEND 7; TALK 18
S=SPOLL (718)

Requesting data from the Model 706 will stop the scan. The

statement:

ENTER 718; A$

does not initiate a scan since the controller addresses the
Model 706 to talk and then requests data in the same state­ment.

3.5.7 Programmable Terminator (Y)

The Model 706 uses special terminator characters to mark the

end of its data string. To allow a wide variety of controllers to be

used, the terminator can be changed by sending the appropri­ate command over the bus. The power up default value is the
commonly used carriage return, line feed (CR LF) sequence.
The terminator assumes this default value upon power up or af­ter the instrument receives a DCL (Device Clear) or SDC (Se-

lective Device Clear).

The terminator may be programmed by sending the ASCII char­acter Y followed by the desired terminator character. Any ASCII
character except one of the following may be used: all capital
letters, ail numbers, Blank, +, -, 1, (J, ., e, :

Special command characters will program the instrument for

3-18

+

special terminator sequences as follows:

1. Y(LF) = CR LF (Two terminators)

2. Y(CR) = LF CR (Two terminators)

3. Y(DEL) = No terminator
NOTE

Most controllers use the CR or LF character to

terminate their input sequences. Using a

nonstandard terminator may cause the con-

troller to hang up unless special programming is

used.

Programming Example-Enter the following statements

into the HP85 keyboard:

Model 706 is-placed in the matrix mode and the display is as

follows:

This format is explained as follows:

nnn m 0 or C

Where:
nnn is a three digit number displaying the column, card # and

unit #.
m is the row from 1 to 4.
o or c denotes open or closed.

As an example, consider the following display

REMOTE 718 (END LINE)

OUTPUT 718; “YtX” (END LINE)

ENTER 718; t$ (END LINE)

After END LINE is pressed the first time the Model 706 is

placed in the remote mode. After END LINE is pressed the se­cond time the terminator is changed to the ASCII character
T. After END LINE is pressed the third time, the HP-85 ceases
to operate because it is waiting for the standard terminator
sequence. The HP-85 may be reset by holding down the

SHIFT key and then pressing RESET on the keyboard.

3.5.8 Inputs

1. Set Number of Poles (AI
The letter A is the command to set the Model 706 into one
of the pole configurations or the matrix mode. There are
three different pole configurations and they are as follows:

A0 = Matrix Mode
Al = l-pole Mode
A2 = 2-pole Mode
A3 or A4 = Cpole Mode

Programming Example-Enter the following statements
into the HP-85 to program the Model 706 into the 4pole
mode.

REMOTE 718 (END LINE)

OUTPUT 718; “A3X” (END LINE)

When the END LINE key is pressed the second time, the

Model 706 is placed in the 4-pole mode. To verify the Model
706 is now in the Cpole mode, press PRGM, 6 and note the
front panel display. Press ENTER to return to normal display.

Where:
004 Denotes unit #l (001 through 050 denotes unit #l).
004 Also, denotes card #l (001 through 005 denotes card

#l).

004 Also, denotes column #4.

2 denotes row #2

c denotes the crosspoint is closed

Therefore, the display 004 2 c means that the crosspoint of

unit #l, card #I, column #4, row #2 is closed. The programm­ing statement that depicts this crosspoint is as follows:

OUTPUT 718; “COO42X” (END LINE)

To display the previously programmed crosspoint on the

Model 706s display enter the following statement into the
HP-85.

OUTPUT 718; “B0042X” (END LINE)

Now, return the Model 706 to the 2-pole mode by entering
the following statement into the HP85 keyboard:

OUTPUT 718; “A2X” (END LINE)

The l-pole mode is available only on the Model 7056 scanner
card. On the card, relay Kill is the output relay for the even
channels and relay K112 is the output relay for the odd chan-

nels. These relays close when the appropriate channel relays

close. In the l-pole mode, each channel relay on the 7056
scanner card controls two channels. This is because they are
the same relay. For example, jf the channel 1 relay is closed,
then the channel 2 relay is also closed because they are the

same relay. The closed channels do not reach the output

unless the appropriate output relay is closed.

Programming Example-Enter the following statements
into the HP85 to program the Model 706 into the matrix
mode.

REMOTE 718 (END LINE)

OUTPUT 718; “AOX” (END LINE)

When the END LINE key is pressed the second time, the

In some situations this may close channels that are not pro­grammed as closed. For example, if channels 1 and 4 are pro­grammed as closed, then because of the scanner card’s ar­chitecture, channels 2 and 3 are also closed. Refer to the
following chart.

I-Pole P-Pole
Nomenclature

Nomenclature

Channel 1 = Channel 1 Relay + Output Relay K112

3-19

Channel 2 = Channel 1 Relay + Output Relay Klll Use the display channel command (B) to verify that each
Channel 3 = Channel 2 Relay + Output Relay Kl12
Channel 4 = Channel 2 Relay + Output Relay Kll 1

channel has closed. Refer to Table 2-15 for the maximum

number of relays that can be closed simultaneously.

Channel 19 = Channel 10 Relay + Output Relay Kl12
Channel 20 = Channel IO Relay + Output Relay Klll

2. Display Channel (B)
The letter B is the command to program the Model 706 to

display a particular channel. The format for the display
channel command is as follows:

Bnnnn

. where:

B = Display channel command.
n = Number of channel.

Programming Example-Enter the following statements
into the HP-85 to program the Model 706 to display channel

7.
REMOTE 718 (END LINE)

OUTPUT 718; “B7X” (END LINE)

The number of channels for a particular configuration is
determined by the number of poles, and Model 706’s daisy
chained together. If the channel specified in the statement is
greater than the highest available channel, the Model 706
gives an IDDCO and then returns to the previously displayed
channel. Take note of the front panel display upon pressing
END LINE the second time. Channel 7 should be displayed.

3. Close Channel (Cl
The letter C is the command to close a particular channel.
The format for the closed channel command is as follows:

NOTE
The number of channels for a particular con­figuration is determined by the number of poles,
and Model 706’s daisy chained together.

4.

Display Mode (D)

The letter D is the command to set a particular display
mode. There are five display modes and they are as
follows:

DO = Display Channel
Dl = Display Interval Time

D2- = Display Time
D3 = Display Date
D4 = Display Message

Programming Example-Enter the following statements

into the HP-85 to display the date.

REMOTE 718 (END LINE)

OUTPUT 718; “D3X” (END LINE)

When END LINE is pressed the second time, the Model 706

displays the date.

5. Set Date Format (El
The letter E is the command to program the Model 706 to

set the date format for american date format or the inter­national date format. The two formats are as follows:

EO = American Date Format: mm.dd
El = International Date Format: dd.mm

Cnnnn

-where:
C = Close channel command.

n = Number of channel.

Programming Example-Enter the following statements

into the HP85 program Model 706 to close channel 7. When END LINE is pressed the third time, the Model 706 is

REMOTE 718 (END LINE)

OUTPUT 718; “C7X” (END LINE) NOTE

Take

note of the front panel display upon pressing END LINE

the second time. Channel 7 should be closed.

Multiple channels can be closed simultaneously over the bus.
For example, close channels I-IO by entering the following

statement into the HP85 keyboard:

OUTPUT 718; “Cl C2 C3 C4 C5 C6 C7 C8 C8
ClOX” (END LINE)

3-20

Programming Example-Enter the following statements

into the HP-85 to set the international date format.

REMOTE 718 (END LINE)

OUTPUT 718; “D3X” (END LINE)

OUTPUT 718; “ElX” (END LINE)

programmed for the international date format.

Do not place the set date format (El command
after another command in the same string. The
Model 706 will process the E command as an ex­ponent for scientific notation and create an in­valid condition. Use the E command in a
separate string.

Use the following statement to return the Model 706 to the

display channel mode:

OUTPUT 718; “DOX” (END LINE)

Set First Channel (F)

6.
The letter F is the command to program a specific channel

as the first channel. Any channel within the limits of the

specified channels can be programmed as the first chan-

nel. The format for the set first channel command is as

follows:

Fnnnn

where:

F = Set first channel command.

n = Number of channel.

Programming Example-Enter the following statements

into the HP-85 to set channel five as the first channel.

REMOTE 718 (END LINE)

OUTPUT 718; “F5X” (END LINE)

When END LINE is pressed the second time, the Model 706
sets channel five as the first channel. To display the channel
mode send a DO command. To display channel 5 send a 55.

NOTE

The number of channels for a particular con-

figuration is determined by the number of poles,
and Model 706’s daisy chained together.

7. Prefix (G)

When the Model 706 is addressed to talk, the instrument
sends a data string containing information on programmed
channel data. Through the use of the prefix command, the
operator has control over whether or not, the instrument

sends the appropriate prefixes imbedded in the data

string.

Refer to paragraph 3.5.1 for an example program. The 19
prefix commands are as follows:

GO-Channel data transmitted with prefix.

Cnnnn,Sn

where:
C = Present Channel
S = Status of Present Channel (N = o =open,

N = I= closed)

nnnn = Number of Present Channel

Gl -Channel data transmitted without prefix.

nnnn,n

G2-Entire channel buffer state transmitted with prefix.

COOOO,Sn

COO01 ,Sn

.
.

Cnnnn,Sn

G3-Entire channel buffer state transmitted without prefix.

OOOO,n
0001,n

.
0

.
nnnn,n

G4-I/O status port transmitted with prefix.

I/O iii,000
where:

i = Input from 0 to 377 octal.
o=Output from 0 to 377 octal.

G5-l/O

status

. . .

111,000

port transmitted without prefix.

GG-Time and date transmitted with prefix

(AMR/INT) Thh:mm:ss, Ddd:mm
where:
T=Time in hours, minutes and seconds.

D = Date in days and months.

G7-Time and date transmitted without prefix

hh:mm:dd, mm:dd

G8-Status word transmitted with prefix.

706 ADEJKPTG M Y
706 1100000000000:

GS-Status word transmitted without a prefix.

ADEJKPTG M Y

1100000000000:

GIO-Channel settle time transmitted with prefix.

Hnnn.nnn

Gl 1 -Channel settle time transmitted without prefix.

nnn.nnn

Gl2-Alarm time transmitted with prefix.

Qhh:mm:ss

Gl3-Alarm time transmitted with prefix.

hh:mm:ss

Gl4-Interval time transmitted with prefix.

Wnnn.nnn

G15-Interval time transmitted without prefix.

nnn.nnn

Gl6-First and last channel numbers transmitted with

prefix.
Fnnnn, Lnnnn

Gl7- First and last channel numbers transmitted without

prefix.
nnnn,nnnn

Gl8-Previously recalled buffer location (relay set up)

transmitted with prefix.
Rnn

Gl9-Previously recalled buffer location (relay set up)

transmitted without prefix.

nn

8. Set Channel Settle Time (HI
The letter H is the command to set the channel settle time.

The channel settle time is the programmed time each

channel has to settle. The format for this command is in
seconds and is as follows:

Hnnn.nnn

3-21

Programming Example-Enter the following statements
into the HP85 to program settle time of each channel to

50.05 seconds.
REMOTE 718 (END LINE)

OUTPUT 718; “H50.050X” (END LINE)

When END LINE is pressed the second time, the settle time
of each channel is set to 50.05 seconds. Upon completion of
the programmed settle time the Model 706 outputs a

negative going lTL level pulse of greater than 10pec to the
channel ready output. The pulse can be used to inform
another device or instrument that the programmed settle time
is completed for one channel. To display the settle time on
the controller’s display use the six line program in paragraph

3.5.1. Use GIO instead of GO to send the settle time with a
prefix and do not use line 20 (clear). To display the settle time
on the Model 706 front panel activate front panel Program 2.

3. Channel Save/Recall (I) and (Zl
The letter I is the command to save the present relay set up

or recall the stored relay set up. Refer to paragraph 2.9.5
and 2.9.6 (front panel Program 4 and 5) for more informa­tion concerning saving and recalling relay set up. The for­mat for the save/recall command is as follows:

IO-clears all memory locations.
101 through 175 save the present relay set up.

ZOI through Z75 recall the corresponding relay set up.

Programming Example-Enter the following statements
into the HP-85 to program the Model 706 to save the present
relay set up.

REMOTE 718 (END LINE)

OUTPUT 718; “11X” (END LINE)

When END LINE is pressed the second time, the Model 706
saves the present relay set up. To recall the stored relay set

up enter the following statements into the HP-85.

REMOTE 718 (END LINE)

OUTPUT 718; “ZIX” (END LINE)

When END LINE is pressed the second time, the Model 706

recalls the stored relay set up.

Programming Example-Use the following program to
store a relay set up of channels 1 through 5 with the program­med first channel being channel 1, and the programmed last
channel being channel 5. The odd channels are programmed
closed and the even channels are programmed open. Type
the following program into the HP-85:

PROGRAM
IO REMOTE 718 (END

LINE)
20 CLEAR 7 (END LINE)
30 OUTPUT 718; “Bl Fl

ClX” (END LINE)

COMMENTS
Sets the Model 706

remote mode.

Clears the Model 706.
Displays, closes and sets

channel 1 as the first

channel.

40 OUTPUT 718; “B2N2X”

(END LINE)

50 OUTPUT 718; “B3C3X”

(END LINE)

60 OUTPUT 718; “B4N4X”

Displays and closes channel

2.
Displays and opens channel

3.
Displays and opens channel

(END LINE) 4.

70 OUTPUT 718; “B5L5C5X” Displays, closes & sets

(END LINE)

80 OUTPUT 718;“llX”

channel 5 as last channel.
Saves relay set up.

(END LINE)

90 OUTPUT 718;“RX”

(END LINE)

Opens all channels and dis­plays the first channel.

100 END

Press the RUN key on the HP-85 to run the program. After
the RUN key is activated the Model 706 displays the reset
condition.

rim-7-q

Use the following programming statement to recall and

display the stored relay set up.

OUTPUT 718; “Zlx” (END LINE)

This statement and the previous nine step program saved and
recalled one relay set up. With the front panel CHANNEL but­ton advance through to channel 5 and notice that the set up

was indeed saved then recalled. The Model 706 is capable of

saving and recalling 75 relay set ups. The commands to save

and recall the relay set ups are as follows:

IO save 0 in all locations.
101 saves a set up and ZOI recalls the set up that 101 saved.
102 saves a set up and 202 recalls the set up that 102 saved.
103 saves a set up and 203 recalls the set up that 103 saved.

8, ,I

I;5 sables i sit ip and &5 reialls’;heiet u’;, that 175 sa(;ed.
It is possible to save a relay set up in any order. For example,

102 can save a set up without having a set up saved by II, 13,

etc.

10. ROM and LED Test (JI
The letter J is the command that programs the Model 706

to go through many of the testing routines that are

automatically performed upon power up. When the self
test command is sent, the following actions are per­formed:

A. ROM Test

B. LED Test (All front panel LEDs turn on for a short

period of time.)

C. If the tests did not find anything wrong, then the self

test (J) byte in the status word is set to one. If the
test failed then the self test byte (JI is set to two.

The self test command is implemented with the following
command sequence:

3-22

OUTPUT 718; “JOX” (END LINE)

NOTES:

1. Other operating parameters are not affected by the JO
command.

2. RAM is not tested by the JO command but is tested upon
power up.

11. EOI (End or Identify) (K)
The letter K is the command that programs the Model

706 to either send or not send EOI on the last byte out on

a multiple byte sequence. EOI response of the instrument
may be programmed as follows:

. ._ KO-Send EOI during last byte.

Kl -Send no EOI.
Upon power up, or after receiving a SDC or DCL com-

mand, the Model 706 will be in the KO mode.

Programming Example-The EOI will be suppressed with
the following statement sequence:

REMOTE 718 (END LINE)

OUTPUT 718; “KIX” (END LINE)

Note, that, the HP-85 does not rely on EOI to mark the end of
the data transmission. Some controllers, however, may re­quire that EOI be present at the end of transmission.

NOTE

In the G2 and G3 prefix modes, EOI is transmit­ted only at the end of the complete program
memory transmission; not during the last byte of
each IEEE buffer or memory location.

12. Set Last Channel (LI
The letter L is the command to program a specific chan-

nel as the last channel. The last channel must be at least
one channel ahead of the first channel otherwise, the
scan sequence will not operate properly. For example, if
the first channel is programmed to be 5, then the last
channel must be specified as at least 6. The format for set
last channel configuration is as follows:

Lnnnn

verify it is programmed as the last channel, type the

following

statement into the HP-85:

OUTPUT 718; “BlOX” (END LINE)

NOTE

The number of channels for a particular con-

figuration is determined by the number of poles

and Model 706 units daisy chained together.

13. SRQ (MI
The letter M is the SRQ command mode. The SRQ mode

controls which conditions within the instument generates
a SRQ (Service Request). Once a SRQ has been
generated, the status can be checked to determine if the

SRQ was generated by the Model 706. In addition, other
bits in the status byte are sent depending on certain data
and error conditions. For more information concerning
the SRQ byte and SRQ mask refer to paragraph 3.5.5.

14. Open Channel (N)
The letter N is the command to open a specific channel.

The format for the open channel command is as follows:

Nnnnn

where:

N = Open channel command.
n = Number of channel.

Programming Example-Enter the following statements
into the HP-85 to program the Model 706 to open channel 7.

REMOTE 718 (END LINE)

OUTPUT 718; “N7X” (END LINE)

When END LINE is pressed the second time, the Model 706
opens channel 7. To display 7 and verify it is open, type’the
following statement into the HP-85:

OUTPUT 718; “B7X” (END LINE)

NOTE

The number of channels for a particular con-

figuration is determined by the number of poles

and Model 706 units daisy chained together.

where:

L = Set last channel command.

n = Number of channel.

Programming Example- Enter the following statements
into the HP-85 to set channel 10 as the last channel.

REMOTE 718 (END LINE)

OUTPUT 718; “LlOX” (END LINE)

When END LINE is pressed the second time, the Model 706

sets channel 10 as the last channel. To display channel 10 and

15. I/O Port (0)
The letter 0 is the I/O port command. It controls the

status of the eight output bits on the display I/O port on
the rear panel of the Model 7%. The format for the I/O

port command is as follows:

Onnn
where:
0 = I/O Port Command
n = 0 to 377 Octal

Converting the octal base of n to correspond to base 2,
eight outputs for the digital l/O outputs is as follows:

3-23

nnn = nnnnnnnn if 0, the bit is low.
(octal) binary) if 1, the bit is high.
Example: 077 =OOl 11111

(Octal) = (Binary)

The I/O port command consists of the ASCII 0 character
followed by the decimal number that sets the control bits.
Upon power up, or after a DCL or SDC command, the
eight output lines are set low. Table 3-10 lists all digital
I/O port conact pin assignments. Figure 3-5 shows the
contact pin locations. The maximum current drawn from

the digial I/O port is 350mA. This includes the relay card

and the output. The current limiting resistor is 683.

llllon~u~un

+I

Figure 3-5. Digital l/O Port Pin Assignment

Table 3-10. Digital I/O Port Contact Pin Assignment

‘in Number

1
2
3
4
5
6
7
8
3

10
11
12
13
14
15
16
17
18
19

20

Programming Example-Enter the following statements
into the HP85 to set the eight output lines high and display

the result on the HP85 CRT.

5 7 9 11 13 15 17

1 3

EVEN NUMBERED PINS ARE

ON OTHER SIDE OF BOARD.

Connection

+5 Volts (for reference only)
+5 Volts (for reference only)

IEEE Common

IEEE Common
Input (Bit 7)
Output (Bit 71
Input (Bit 6)

Output (Bit 6)

Input (Bit 5)

Output (Bit 51

Input (Bit 4)

Output (Bit 4)

Input (Bit 31

Output (Bit 3)

Input (Bit 2)

Output (Bit 2)
Input (Bit I)
Output (Bit 11
Input (Bit 01
Output (Bit 0)

19

i

PROGRAM
10 REMOTE 718 (END

LINE)

20 CLEAR 7 (END LINE) Clears Model 706.
30 OUTPUT 718;

“0377X” (END LINE)

40 OUTPUT 718; “G4X”

(END LINE)

50 ENTER 718; A$ (END

LINE)
60 DISP A$ (END LINE)
70 END (END LINE)

When the RUN key is pressed the eight output lines will go
high and the following is displayed on the HP-85 CRT.

I/O xxx,377

With no connections on the digital I/O inputs
they are undefined.

16. Program (PI

The letter P is the command to select one of the three
scanning modes and to enable or disable the inspect

mode. The scanning modes are explained in detail in
paragraph 2.5.4. The format for each of the program
modes is as follows:

PO-Step Mode
PI -Single Mode
P2-Continuous Mode
P3 - Inspect Mode

P4-Disble Inspect Mode, return to previous P mode.

Programming Example-Enter the following statements
into-the HP-85 to program the Model 706 into the continuous
mode.

REMOTE 718 (END LINE)

OUTPUT 718; “Pw” (END LINE)

When the END LINE key is pressed the second time the
Model 706 is programmed into the continuous program
mode. Look at the front panel continuous LED to verify that
the continuous scan mode was activated. The continuous
LED should be on.

17. Set Alarm Time (Q)

The letter Q is the command to set the alarm time. For ex­ample, if the alarm time is set for 11:30:00 a TTL level
negative going pulse of greater than 10~~ appears at
the SERIAL OUT output connector on the rear panel of
the instrument at 1 I:30 AM everyday until changed. This
pulse can be used to inform another instrument or device

to initiate a scan sequence or open a channel on the

Model 706. The format for the alarm time command is as

follows:

COMMENTS
Sets Model 706 to remote

mode.
Sets Digital I/O outputs

hiah.

S&rds 1/O status port with
prefix.
Obtain data sting.

Display data string.

End of program.

NOTE

3-24

Qhh:mm:ss
where:
0 = Alarm time command.
h = Hours
m = Minutes
s = Seconds

set the time. The format is as follows:

Shh:mm:ss

where:

S = Set time command.

h = Hours

m = Minutes

s = Seconds

Programming Example- Enter the following statements

into the HP85 to program the alarm time for 2:15 pm and

Programming Example-Enter the following statements

into the HP85 to set the time to 5:00 pm.

display the alarm time on the HP85 CRT.

PROGRAM
10 REMOTE 718 (END

(END LINE)
20”CLEAR 7 (END LINE)
30 OUTPUT 718; “Ql4:15:

00X” (END LINE)
40 OUTPUT 718; “G12X”

(END LINE)

50 ENTER 718; A$ (END

LINE)
60 DISP A$ (END LINE)
70 END (END LINE)

COMMENTS
Sets Model 706 to remote

mode.
Clears Model 706.
215 pm.

Transmits alarm time with
prefix.
Obtains data string.

Displays data string.

End of program.

When the END LINE key is pressed the second time, the

Model 706 displays the time and sets it to 5:00 pm.

OUTPUT 718; “D2Sl7:OO:OOX” (END LINE)

.-When the format of the programmed time is not

the full six digits (hh:mm:ss) the Model 706 trun­cates the time to what is programmed. If in this
example the last zeroes are left out the time

would be programmed for 17 seconds not 5:00

pm. The colons between the hours, minutes and
seconds are optional.

20. TriggeT Modes (Tl

When the RUN key is pressed, the alarm time is set for 2:15

pm. The alarm time is also displayed on the HP-85 CRT.

NOTE
When the format of the programmed time is not
the full six digits (hh:mm:ss) the Model 706 trun­cates the time to what is programmed. If in this
example the last two zeroes were left out the
time would be programmed for 14 minutes 15
seconds AM. The colons between the hours,

minutes and seconds are optional.

18. Reset (RI
The !etter R Is *ho ~mmad thzt programs the-Mode!

L, .” ““I I I. I .U. .U
706 to reset conditions. The reset conditions are: all
channels open and display the specified first channel. RI

The trigger commands control the stimulus to be used to
start or stop Model 706 program operation. Basically, the
trigger stimulus controls instrument operation much like
the front panel START/STOP button does, except that
the trigger stimulus can control either start or stop (not

both), depending on the selected trigger mode. Model

706 trigger modes are:

TO-Start on talk.

Tl -Stop on talk.
T2-Start on GET.
T3-Stop on GET.

T4-Start on “X’.

T5-Stop on “XI’.
T6-Start on external.

thru R75 clears the corresponding buffer location. l7-Stop on external.

REMOTE 718 (END LINE)

NOTE

Programming Example-Enter the following statements
into the HP-65 to reset the Model 706.

REMOTE 718 (END LINE)

OUTPUT 718; “RX” (END LINE)

When the END LINE key is pressed the second time, the
Model 706 gses to the reset- conditm.

NOTE
The first channel was set to 5 in a previous ex­ample. When the END LINE key is pressed the
second time the Model 706 should display the
following:

19. Set Time 6)
The letter S is the command to program the Model 706 to

NOTES

1. In the step (manual) program mode, the instrument ad­vances one channel location with each trigger stimulus.

2. When the instrument is triggered to start, program execu­tion begins at the present channel location.

3. Sending a trigger over the bus while in the matrix mode
displris the R---II

,.......s-r. nlrrn” . Ah l hr. mr mn+ h .u 8.

r;L,all mc~awG alvllu dklrl, ~rllG-pleaGl,L ubllel
location. Sending a trigger (in the appropriate trigger
mode) over the bus while in the matrix mode and the
Recall message is displayed advances the instrument to

the next buffer location. Refer to paragraph 2.9.6.

Programming Example-In the following programming ex­ample the Model 706 is programmed to scan channels 1
through 50 at a 500msec rate upon receiving a GET com-

mand.

3-25

PROGRAM
10 REMOTE 718 (END

LINE)
20 CLEAR 7 (END LINE)
30 OUTPUT 718; “DOFI L

5OW.5T2Pw”

(END LINE)

40 TRIGGER 718
50 DISP “PRESS CONT

TO STOP PROGRAM”

60 PAUSE
70 CLEAR 7
80 END

Press the RUN key on the Model 706 to start the program.

After the RUN key is pressed the Model 706 scans channel 1
through 50 at the 500msec rate. The start on GET command

in 02) line 30 programs the Model 706 to start the scan upon
receiving a GET command. In this program the GET com­mand is provided by the TRIGGER statement. To stop the
program press the CONT. key. To resume the program press
the RUN key.

Sending any valid command during a scanning

sequence, STOPS THE SEQUENCE at the

presently displayed channel or crosspoint.

21. Set Date (VI
The letter V is the command to set the date. The format

for the set date command is as follows:
Vmm:dd (American)
Vdd:mm (International)

Programming Example-Enter the following statements
into the HP-85 to program the date for July 12th.

REMOTE 718 (END LINE)

OUTPUT 718; “V12:07X” (END LINE)

OUTPUT 718; “D3X” (END LINE)

When END LINE is pressed the second time, the Model 706

sets the date for July

END LINE key is pressed the third time the date is displayed
on the Model 706. For american format the second state­ment would be:

OUTPUT 718; “VO7:72X” (END LINE)

The date (american or international) must appear in the

statement as a four digit number. If three digits are used in­stead of four the Model 706 moves the three digits to the
right by one place. For example, enter the following state­ment into the HP-85.

12th

COMMENTS
Programs Model 706 into

the remote mode.

Clears Model 706.
Programs the Model 706

display channel mode,

channel 1 as first channel,

channel 50 as last, interval
time is 500msec, con­tinuous scan mode and start
on GET mode.
Provides GET command.

Displays message

Program pause.
Clears Model 706.
End of program.

NOTE

in international format when the

for

on HP-85.

OUTPUT 718; “Vl23X” (END LINE)

When the END LINE key is pressed the date is set to 01.23
which is January 23rd in the American format. If two or less
digits are used instead of four digits the Model 706 displays
an IDDCO (Illegal Device-Dependent Command Option)
does not change the present date. The colon between the
month and day in the statement is optional.

22. Set Interval Time (WI
The letter W is the command to set the interval time in

seconds. The maximum interval time is the programmed
time for the channet to be closed.
terval time command is as follows:

Wnnnnnn
where:
W = Set interval time command.
n = Number of seconds.

Programming Example-Enter the following statements
into the HP-85 to program the interval time to three
seconds.

REMOTE 718 (END LINE)

OUTPUT 718; “WOO3.OOX” (END LINE)

When the END LINE key is pressed the second time, the

Model 706 sets the interval time to three seconds. To verify

that the interval time has been set to three seconds

Dl command. This is the command to display the interval

time.

In the second statement the leading and trailing zeroes are

optional. As long as the decimal point is entered in the ap-

propriate place the leading and trailing zeroes are optional.

The interval time format on the Model 706 display is always
six digits.

23. Programming Terminator (Y)
The Model 706 uses special terminator characters to

mark the end of its data string. To allow a wide variety of
controller’s to be used, the terminator can be changed by
sending the appropriate command over the bus. For
more information and a programming example refer to

paragraph 3.5.7.

24. Alternate Outputs (U)
The letter U is the command’ to program the Model 706

to transmit the status word, settle time, alarm time, inter­val time or first/last channel data on talk. The alternate

output can also transmit the U commands with or without
a prefix.

Programming Example-To send and display the time and

date enter the following program into the HP-85:

PROGRAM :

10 REMOTE 718 (END LINE)

The

format for the in-

COMMENTS

Model 706 set to remote.

and

send a

, 3-26

20 CLEAR 7 (END LINE)
30 OUTPUT 718; “U3X”

(END LINE)
40 ENTER 718; A$
50 DISP A$
60 END

The commands are as follows:

UO-Sending UO command outputs the present channel

number. The present channel number can be sent with
or without a prefix depending on the present prefix
mode (G). Refer to the flowchart in Figure 3-6 for the se­quence of sending the U and G modes. Refer to
paragraph 3.5.8 step 7 for information concerning the
prefix modes and their formats.

Ul-Sending the Ul command outputs all the channel

numbers. All the channel numbers can be sent with or
without a prefix depending on the present prefix mode

(G). Refer to the flowchart in Figure 3-6 for the se­quence of sending the U and G modes. Refer to
paragraph 3.5.8 step 7 for information concerning the
prefix modes and their formats.

U2-Sending the U2 command outputs the digital I/O port

status. The digital I/O port status can be sent with or
without a prefix depending on the present prefix mode
(G). Refer to flowchart in Figure 3-6 for the sequence of
sending the U and G modes. Refer to paragraph 3.5.8
step 7 for information concerning the prefix modes and
their formats.

U3-Sending the U3 command outputs the time and date.

The time and date can be sent with or without a prefix
depending on the present prefix mode (G). Refer to the

. flowchart in Figure 3-6 for the sequence of sending the

U and G modes. Refer to paragraph 3.5.8 step 7 for in­formation concerning the prefix modes and their for­mats.

U4- Sending the U4 command outputs the status word. The

status word can be sent with or without a prefix depen­ding on the present prefix mode (G). Refer to the
flowchart in Figure 3-6 for the sequence of sending the

U and G modes. Refer to paragraph 3.5.8 step 7 for in­formation concerning the prefix modes and their for-

mats.

U5-Sending the U5 command outputs the channel settle

time. The channel settle time can be sent with or
without a prefix depending on the present prefix mode

(G). Refer to the flowchart in Figure 3-6 for the se­quence of sending the U and G modes. Refer to

paragraph 3.5.8 step 7 for information concerning the

prefix modes and their formats.

UG-Sending the U6 command outputs the alarm time. The

alarm time can be sent with or without a prefix depen-

ding on the present prefix mode (G). Refer to the

flowchart in Figure 3-6 for the sequence of sending the

U and G modes. Refer to paragraph 3.5.8 step 7 for in-

formation concerning the prefix modes and their for-

mats.

Clears Model 706.
Sends time and date.

Obtain data string.
Display data string.
End of program.

U7-Sending the U7 command outputs the interval time. The

interval time can be sent with or without a prefix depen­ding on the present prefix mode (GI. Refer to the
flowchart in Figure 3-6 for the sequence of sending the

U and G modes. Refer to paragraph 3.5.8 step 7 for in­formation concerning the prefix modes and their for-

mats.

U8-Sending the U8 command outputs the programmed first

and last channel. The programmed first and last channel
can be sent with or without a prefix depending in the
present prefix mode (G). Refer to the flowchart in Figure
3-6 for the sequence of sending the U and G modes.

Refer to paragraph 3.5.8 step 7 for information concern­ing the prefix modes and their formats.

US-Sending the U9 command outputs the previously :-

called buffer location. The buffer location can be sent

with or without a prefix depending on the present prefix

(G) mode. Refer to the flowchart in Figure 3-6 for the se­quence of sending the U and G modes. Refer to
paragraph 3.5.8 step 7 for information concerning the
prefix modes and their formats.

FORMAT OUTPUT

ACCORDING TO

G MODE

FORMAT OUTPUT

ACCORDING TO

U MODE

- - _ - . --. -.

OUTPUT

Figure 3-6. U and G Mode Sequence

3.6 STATUS BYTE FORMAT
The status byte contains information relating to data and er-

ror conditions within the instrument. The controller obtains
the status byte by using the serial polling sequence (SPE)
described in paragraph 3.4.2. Once the byte resides in the

3-27

computer, the information in Figure 3-7 can be used when in-

terpreting data and error conditions.

Bit six is the SRQ bit. If this bit is set the service request was
made by the Model 706. Bit five determines the meaning of

bits zero through three. If bit five is set, the error conditions
listed in Table 3-9 apply to bits zero through three. If bit five is
cleared, the data condition listed in the table apply.

To output the status byte in binary form (Figure 3-7) enter the
following program into the HP-85.

PROGRAM
10 REMOTE 718 (END LINE)

COMMENTS

Programs the Model 706
into the remote mode.

2d S = SPOLL (718) (END

Start serial poll sequence.

LINE)

30 DISP “B7 B6 85 B4 B3

82 Bl BO” (END LINE)

40 FOR I =7 to 0 STEP -1

Display contents of

quotation mark.

Loop eight times.

(END LINE)

- 50 DISP BIT (S,I); (END

Display status byte.

LINE)

60 NEXT I (END LINE)
70 DISP (END LINE)
80 END (END LINE)

Press the RUN key to start the program. After the RUN key is

pressed the Model 706 outputs the status byte to the con­troller. The controller then displays the

status

byte in the form

shown in Figure 3-7.

3.7 STATUS-WORD (U)
The status word command allow access to information con-

cerning various operating modes of the Model 706. The
status word also contains information about the present

status of the input and output lines on the digital I/O port.
When the correct command is given, the Model 706 outputs
the status word or I/O status the next time it is addressed to
talk instead of sending its normal data string. Each byte in the
status word is a number corresponding the previously pro­grammed parameter with the following sequence:

706 ADEJKPTGMY

Refer to Figure 3-8 for an example of the status word.
To output the status word enter the following program into

the HP-85.
PROGRAM COMMENTS

10 REMOTE 718 (END LINE)

Programs the Model 706

into the remote mode.
20 CLEAR 7 (END LINE)
30 OUTPUT 718; “U4X”

Clears the Model 706.
Outputs status word.

(END LINE)

40 ENTER 718; A$ (END

Obtains data string.

LINE)

50 DISP A$ (END LINE) Displays data string.

60 END (END LINE) End of oroaram.

Press the RUN key to implement the program. After pressing

the RUN key the Model 706 outputs the status word. In this
case the status word is transmitted to the controller with a

prefix.

l-NO

REMOTE

I

I

87 B6

l/O

I

O:;N:=

Sl3lUNG

TIME

O= END OF

INTERVAL
TIME

O-END OF
SCAN

O-TIMER

ALARM

I

B6 B4 83 82 El

110 l/O 110 l/O 110 l/O

I 1 I

Figure 3-7. Status Byte Format

I

I

I

L

I

1

B6

110

_I

1

-

NOTES

Figure 3-8. Status Word Format

1. SRQ status information contains three bytes. These three
bytes assume the decimal value previously set by the SRQ
mode command.

2. To make sure proper status is returned, the status word
should be read immediately after sending the command.

J

Otherwise, instrument status may be changed from the
front panel, resulting in erroneous status information.

3. The status word should not be confused with the SRQ
status byte. The status word contains a number of bytes
pertaining to the various operating modes of the instru­ment. The status byte is a single byte that is read by using
the serial poll sequence and contains information on SRQ
status and error or data conditions.

3-28

3.8 FRONT PANEL PROGRAMS

3.9.1 IDDC Emor

All the front panel programs described in paragraph 2.9, ex­cept Programs 3, 90, 91 and 92 can be controlled over the
bus. For detailed examples and explanations of the front
panel programs refer to paragraph 2.9.

3.9 FRONT PANEL ERROR MESSAGES
The process of programming the Model 706 involves the pro-

per use of syntax. Syntax is defined as the orderly systematic
arrangement of programming commands or languages. The
Model 706 must receive valid commands with proper syntax
or it will:

1. Ignore the entire command string in which the invalid com­mand appears.

2. Set appropriate bits in the status byte.

3. Generate an SRQ if programmed to do so.

4. Display an appropriate front panel error message.
Device-dependent commands are sent as a string of several

ASCII characters. Some examples of valid command strings
include:

FOX-Single command string.
FOQlBW-Multiple command string.
Bl X-Space is ignored.

Examples of invalid command strings are:
@OX-Invalid command; @ is not a command.

DGX-Invalid command option; 6 is not an option of the D
command.

An IDDC error results when the Model 706 receives an invalid
command such as SX. This command is invalid because no

such letter exists in the instrument’s programming language.

Programming Example-To demonstrate an IDDC error,

enter the following statements into the HP-85 keyboard:

REMOTE 718 (END LINE)

OUTPUT 718; “SX” (END LINE)

When END LINE is pressed the second time, the error
message in Figure 3-9a is displayed for about one second.

3.9.2 No Remote Error

. .

A front panel no remote error message will be displayed if the

Model 706 is not in the remote mode when it receives a com­mand over the bus. If an attempt is made to program the in-

strument when it is not in the remote mode, the no remote

message in Figure 3-9c will be displayed on the front panel for

about one second.

Programming Example-To make sure the instrument is
not in the remote mode, enter the following statements into

the HP-85:

LOCAL 7 (END LINE)

Now enter the following programming statement into the
keyboard:

The numbers after the command are each interpreted as a

decimal integer. For example:

TO1 .0X-Interpreted as TIX.
TX-Means TOX.

Figure 3-9 shows the front panel error messages used by the
Model 706. The message in Figure 3-9(a) results from an il­legal device-dependent command (IDDC), while the message
in Figure 3-9(b) results from an illegal device-dependent com­mand option (IDDCOI. The no remote message in Figure
3-9(c) results from attempting to program the instrument

when it is not in the remote mode.

I

IddC I

a. Illegal Device Dependent Commend (IDDC)

IddCU

I

b. Illegal Device Dependent Command Option (IDDkOl

c. No Remote

Figure 3-9. IEEE Display Error Messages

I

OUTPUT 718; “DlX” (END LINE)

When the statement is executed, the no remote error
message in Figure 3-9c is displayed on the front panel of the
instrument for about one second.

3.9.3 IDDCO Error
An illegal device-dependent command option (IDDCO)

results when the Model 706 receives an invalid command
such as A7. This command option is invalid because no op­tion of 7 exists for the command A.

Programming Example-To demonstrate an IDDCO error,
enter the following statements into the HP-85 keyboard:

REMOTE 718 (END LINE)

OUTPUT 718; “A7X” (END LINE)

When the END LINE key is pressed the second time, the error
message in Figure 3-9b is displayed for about one second.

3.10 SCANNING PROGRAM
The following program sets the Model 706 for the following

parameters:

3-29

1. Sets programmed first channel to 1.

2. Sets programmed last channel to 100.

3. Sets the interval time to 2OOmsec.

4. Sets the unit to the display mode.

5. Use the continuous scan mode.

6. Trigger the scan sequence on GET.

7. Provide a pause and clear statement.
Enter the following statements into the HP-85 to program the

Model 706 to scan channels 1 through 100 at a 200msec in­terval rate.

PROGRAM

10 REMOTE 718 (END LINE) Model 706 set to remote.
20 CLEAR 7 (END LINE) Clears Model 706.

COMMENTS

30 OUTPU’I”718;

“DOFl LlOOW.2P2Tw”.
(END LINE1

40 TRIGGER 718

50 PAUSE
60 CLEAR 7

70

END

To start the program, press the RUN key on the HP-85.
After the RUN key is pressed the Model 706 scans the pro­grammed channels at the programmed interval rate. To stop
the program simply press the CONT key. The program will
stop at the second channel when the CONT key is pressed.
To resume the program press the CONT key a second time

or press the RUN key. Upon pressing the RUN key or the

CONT key (second time) the Model 706 continues the pro­gram.

Programs the Model 706
for the above parameters.

Provides GET trigger.
Program pause.
Clears Model 706.
End of program.

3-30

+

SECTION 4 -

THEORY OF OPERATION

4.1 INTRODUCTION

This section contains circuit descriptions of the Model 706. The

information is arranged to provide a description of individual

functional circuit blocks. To facilitate understanding, the de-

scriptions are referenced to Figure 4-1, which is an overall block
diagram of the Model 706. Detailed schematics of the Model
706 are located in Section 6.

4.2 POWER SUPPLY

To aid in understanding of the following
block diagram in Figure 4-1.

The power supply is a6V switching supply with 6Acurrent capa­bility. The AC input may range from 95V to 125V or 210V to
250V depending on internaliy selected jumpers. Refer to Sec­tion 5 Maintenance for complete details. The supply operates
on line frequency from 47Hz to 44OHz. Regulation of the line

and load is &0.15% with noise and ripple being a maximum of
5mV p-p.

The supply has an inherent solid state short circuit protection.
An automatic current limiting circuit limits the output current

whjch provides protection for the instrument as well as the sup­ply. There is also a thermal circuit breaker to provide thermal
overload protection.

discussion, refer to

the

shown in the memory map Figure 4-2. Interfacing of the micro-

processor with the RAMS, ROMs, Front Panel, VIA, ACIA or
IEEE-488 interface circuitry is controlled by the address de-

coder, Ul ? 6.

Partial address decoding is used
selected is determined by the state of the Al 3, Al 4 and Al 5 ad­dress lines. These address lines determine which output is se­lected by the decoder U116 in accordance with the memory
map. Only one of these device (ROM, RAM, VIA, ACIA, etc.) will
have access to the data bus at any one time. The address de­coder selects one of the devices only after a valid memory ad­dress (VMA) has been asserted at the decoders input Gi (pin

6). The VMA signal is generated by the 6808 microprocessor.

Timing for the computing sequences is provided by 4MHz
tals Yl 01. The 6808 microprocessor
to produce a 1 MHz signal at the E (pin 37) output. This is a sin­gle phase TTL compatible clock. The clock may be conditioned

by a memory read signal. This output is capable of driving one

standard TTL load and 13OpF.

U115 and its associated circuitry form a reset circuit which re-

sets the microprocessor VIA, ACIA and IEEE-488 interface cir­cuitry. The circuit actuates in the event the front panel display is
not updated after a specific period of time (e.g. interval time) has
elapsed due to a lost program or power line transient. The circuit
also works as a threshold detector circuit.

in

this system. The function

divides

this signal by four

crys-

4.3 MICROCOMPUTER

To simplify understanding of the following discussion refer to
the block diagram in Figure 4-1 and schematic diagram
705-I 06 sheet 3 of 3.

The microcomputer includes a 6808 microprocessing unit
(CPU) UlO5, a 6522 versatile interface adapter [VIA) U120, two
2764 ROMs, Ui 06 and U107. The microcomputer also consists
of two 6116s RAMS U108 and U109, an address decoder
LSI 38 (Ui 16), an asynchronous communication interface
adapter (ACIA) U103 and assorted buffers and line
UYO4, U110, U118, U126, U122, Ul19, Ulll and U112. The
threshold detection and reset circuit consists of Uf 15 and asso­ciated components. If the power supply voltage level drops be­low 4.5V for some reason, U115 resets the Model 706. The bat­tery backup circuitry and clock circuitry consist of U121, U 123,
U124, U127, Ql 01, QI 02, Y102 and associated components.

The IEEE-488 interface circuitry consists of a 9914 general pur-

pose interface bus adapter U102, Ul 01 and U113 are general
purpose bus transceivers. The memory used in this system is

drivers

As seen in schematic 705106 sheet 3 of 3. the data lines run­ning throughout the microcomputer circuitry are labeled as DO
through D7. The address lines running throughout the micro­computer circuitry are labeled as A0 through Al 5.

The serial out and alarm/serial in outputs are controlled by the
ACIA (U103). R109 and RI10 and CR103 comprise a protec-

tion network for these two outputs. The serial out output data is

transmitted, via RI 10 and pin 6 of the ACIA (Ui 03). The alarm/
serial

in data

is transmitted/received via R109 and pin 2 of the
ACIA. The external trigger input and channel ready output are
controlled by the VIA, U120. RlO8, RI I$ and CR1 02 compn’se
a protection circuit for these two connectors, while RI 12 is a pull
up resistor for the external trigger line. The external trigger input
is

routed into the circuitry via

The channel ready output produces a TTL level negative going
pulse of greater than 1 Opsec by way of RI 08 and pin 15 of the

VIA when programmed to do so.

The control of the relay switching is accomplished by the paral-

lel

data

on the data bus being buffered by U110 and sent

Rl 11 and pin 40 of the VIA, Ul20.

+

4-1

I I

ADDRESS

11

ADDRESS BUS

DATA BUS

CONTROL

- 2794 - 2794 - “I6
ROM

U106 uia7

ROM

- RAM - RAM
UlOI

6116

NV NV

u109

I

1 I

lo20

u103

DRIVER

u104

BUFFERS

AND

UIIS lLs244~
u119 iLSl3ul

u122 WSOI

i-

0

d

- 9914
GPIE GPIB

- ADAPTER
u102

I

. 76161

TRANSCEIVER

ulm

IEEE dEAFACE

POWER SUPPLY

PS-17

TRANSCEIVER

D

DIGITAL

*

COMMON

BAT

IEEE BUS

Figure 4-1. Model 706 Block Diagram

MEMORY MEMORY

ADDRESS ADDRESS

IN HEX IN HEX

am
“r-----l

I

COMPONENT

COMPONENT

2k*8 CMOS MEMORY I 6116

to octal latches U421 through U438. The address lines A0
through A3 are buffered by U118 and that output is decoded
by Ul 1 I, U112 and U119. This information is the clock input
for each octal latch. When the appropriate information arrives
(pulse), the corresponding octal latch releases its data to the
proper current drivers which in turn drive the relays on the
cards. Pins 25 through 33 on connector J/P1020 transmits
the buffered parallel data into the octal latches. Pins 3

through 20 are the individual clocks for each octal latch.

BFFF

--w-s,
6oat

DFFF

2k”8 CMOS MEMORY

I

ACIA SERIAL

COMMUNICATION CHIP

STROBE LINES FOR MATRIX

CARD SHIFT REGISTERS

I

VIA VERSATILE

INTERFACE ADAPTER

IEEE INTERFACE

I

RELAY DRIVE AND DISPLAY

BOARD BUSS BUFFER

STROBE LINES

8k*8 ROM 1764

I

8k*8 ROM

4 5116

I

jSAE4l

I 5522

‘

3914A

I

2764

4.4 DISPLAY CIRCUIT
The display data is routed from the VIA on PA0 through PA7

by way of connector PlOlO. The data is updated at a 1kHz
rate which means each digit is on for lmsec. Each update
begins by presenting new segment information on the VIA
(I/O) bus (PAO/PA7) and yields a clock pulse on CA2. The
clock pulse inputs to U203 and shifts a digit enable bit to be
enabled. Every eight times the display is updated, a digit
enable bit is generated at PB3 and is routed to the enable data
input of the shift register.

The first four digit drivers drive the rows of the switch matrix.
The switches are arranged in a four by six matrix. The seg-

ment drivers are Q201 through Q208. In addition to driving

the various segments, they also activate the appropriate

LEDs.

4.5 IEEE-488 INTERFACE CIRCUITRY
The IEEE-488 interface circuitry is comprised of GPIB adapter

UlO2, GPIB octal transceivers UlOl, U113 and associated
capacitors. The standard bus connector (J1002) is located on

the rear panel. The primary address is set from front panel

Program 3. There are no primary address dip switches. Refer

to paragraph 2.9.4 for complete details concerning the

primary address.

GPIB adapter U102 is the heart of the IEEE-488 interface cir­cuitry. U102 is capable of performing all IEEE-488 talk/listen
protocols. The data bus consists of DO through D7. The ad­dress lines that are routed to the IEEE-488 circuitry are AO, Al
and A2. The REN, IFC, NDAC, NRFD, DAV, EOI, ATN and
SRQ lines are controlled by U102. Before the data is transmit-

ted to the IEEE-488 bus via connector 31002, it is buffered by

the octal bus transceivers U101 and U113. The REN, IFC, EOI
(etc.) lines are buffered by U113. UlOl and U113 operate on

the tri-state output principle. That is, the output is either

high, low or in a high impedance state.

FFFF L-m--m-

Figure 4-2. Model 706 Memory Map

Figure 4-2. Model 706 Memory

Map

+

SECTION 5

MAINTENANCE

5.1 INTRODUCTION

This section contains information necessary to maintajn the

Model 706 scanner. The information in this section includes

fuse replacement, line voltage selection, disassembly instruc-

tions and basic troubleshooting information.

5.2 FUSE REPLACEMENT

The Model 706 line fuse (FlOl) is located on the rear panel.

Fi 01 protects the line and the instrument in case of overload. If
the line voltage setting is changed (see paragraph 5.3), the fuse
must be replaced according to Tables 5-I and 5-2. The fuse
may be replaced by using the procedures described in the fol­!0G?g

smanranhc

0-L L+J’ . ..y. I”.

WARNING

Disconnect the Model 706 from the power line
and from other equipment before replacing the
fuse.

Turn power off and disconnect the line cord.

The fuse carrier is spring loaded. Using a flat blade screw­driver, push the fuse carrier in and rotate l/4 turn counter­clockwise. The carrier and fuse will eject from the instru­ment.

Remove the fuse from the carrier and replace per Table
5-1 or Table 5-2.

Table 5-2. Fuse Replacement 5mm Size

Line

Voltage

9ov- 125v

195V-250V

I

5.3 LINE VOLTAGE SELECTION

Set up the Model 706 to operate on the available AC line voltage
as follows:

To prevent a shock hazard, always turn the in­strument off and disconnect
fore removing

1.

Remove the top cover. Refer to the disassembly instruc­tions in paragraph 5.4. Refer to Figure 5-1.

2.

Remove the power supply (PS-17) from the Model 706
mainframe. Refer to the disassembly instructions in para-

graph 5.4 step 6.

3.

Place the jumper across the appropriate pins
Table 5-3. Also refer to Figure 5-2 for location of the jump­ers.

Fuse (FlOf)

1.25A, 250V
SLU-BLO

0.6A, 250v

1 SLO-BLO 1

WARNING

the

top or

bottom cover.

Keithley
Part No.

FU-58
FU-57

the

line cord be-

as

listed in

I

CAUTION

Do not install the fuse with a higher rating than
specified in Table 5-f or 5-2. Instrument dam­age may result.

To install the fuse and carrier into the holder, reverse the

4.
procedure in step 2.

Table 5-1. Fuse Replacement 3AG Size

Line

Voltage Fuse (FIOI)

9ov-125v 1.25A, 250V FU-28

SLO-BLO

195V-250V 0.6A, 250v FU-27

SLO-BLO

Keithley
Part No.

NOTE
Table 5-3 and Figure 5-2 refer to a Xentek supply.
Sheet 1 of the Mother Board schematic shows
jumpers for a Lambda supply.

4.

Install the proper fuse as stated in paragraph 5.2.

Line

Voltage Line Input

+

Jumper

Placement

5-I

FRONT PANEL

\

62

83

I

I

-

8

.

Mm 5-l.

REAR

706-316

TOP

and Bottom

FOOT

12

Required)

Cover

\

\

Removal

0~1 fUM CO\

\

\

9,

706-320

‘ER

+

5.4 DISASSEMBLY

If it becomes necessary to disassemble the Model 706, use the
following procedure. Also, refer to Figures 5-1, 5-2 and 5-3.

1.

Remove the top cover as follows:

WARNING

To prevent a shock hazard, always turn the in-

strument off and disconnect the line cord be-

fore removing the top cover.

A. Remove the top two retaining screws located at the

rear of the instrument.

3. Grasping the top cover at the rear of the instrument,
carefully pull it out and away from the instrument.

2.

Remove the bottom cover in the same manner as the top
cover with one exception. The four feet on the bottom
cover must be removed in order to remove the bottom
cover.

3.

Remove the plug-in cards (see paragraph 22.2).

4.

Remove digital I/O board as follows:

A. Remove the two screws that secure the digital I/O

board to the mounting rail assembly (706311).

B. Disconnect the digital I/O board from the mother

board.

C. ;:,“e digital I/O board from the Model 706 main­Remove the four decorative strips from the side panels as

5.
follows:

A. From inside the mainframe, place a thin blade screw-

driver info one of the holes where the decorative strip
is secured. Refer to Figure 5-3.

6. Carefully push outwards from the mainframe with the
screwdriver. The strip will disengage of one fastener
and then can be pulled away from the mainframe.

C. Repeat steps A and B for the remaining decorative

strips.

D. To install the decorative strip, align the strip in the re-

cessed part of the side panel and press the strip at the
points of the two fasteners. This action secures the
strip in place.

Remove the power supply as follows:

6.
A. Remove the three screws that secure the thermal

breaker shield to the supply and mounting rail. Refer to
Figure 5-3.

5. Remove the ground wire from the power supply.
C. Remove the two screws that secure the power supply

to the side pane!. Carefully lay the supply on top of the
mounting rails.

D. Disconnect the Molex connectors for the AC input and

DC output wires of the supply.

E. Remove the power supply from the mainframe.

F. To install the supply, reverse the procedures of steps

A through E.

NOTE
When installing the power supply, make certain
that the jumpers on the input terminals are config-

ured for the available AC line voltage. Refer to

paragraph 5.3.

7. Remove the mother board as follows:
A.

Disconnect the cable that connects the mother board

to the interconnect board (J/P 1020).

5.

Disconnect the cable that connects the mother board

to the IEEE connector (J/P 1011).

c.

Disconnect the cable that connects the mother board

to the digital I/O board (J/P 1009).

D.

Disconnect the cable that connects the mother board

to the display board (J/P 1010).

E.

With the bottom panel removed turn the Model 706 up­side down and remove the six screws that secure the
mother board to the mainframe.

F.

Remove the two power supply wires (+G) and (G) at
the supply. Remove the wire that goes to the +G inter­connect hole.

G.

Remove the mother board.

H.

To install the mother board, reverse the above proce­dure.

8. Remove the display board as follows:
A. Using a short Phillips screwdriver, remove the four

screws that secure the display board to the front panel.

E. Remove the display board.

C. To install the display board reverse the procedures in

steps A and 8.

9. Remove the interconnect board as follows:

NOTE
This procedure assumes that the mother board and
the power supply are removed.

A. Remove the three screws that secure the interconnect

board to the bottom mounting rail.

B. Remove the three screws that secure the interconnect

board to the top mounting rail.

C. Push the interconnect board towards the front panel

and disconnect the IO shields from the shield fasten-

ers on the interconnect board.
D. Lift the interconnect board out of the mainframe.
E. To install the interconnect board reverse the proce-

dure in steps A through D.

IO. Remove the rear panel as foflows:

A. Remove the four screws that secure the rear panel to

the mainframe.

8. The ALARM/SERIAL IN, SERIAL OUT, EXT. TRIG-

+

5-3

GER, CHANNEL READY, LINE FUSE, Input Power
Receptacle and IEEE-488 Interface connectors are still
connected to their appropriate places in the main-

frame. Be careful when removing the rear panel so as

not to damage the connectors.

0

II

0

C. To install the rear panel: align the rear panel in place and

install the four screws that secure it.

11. To reassemble the Model 706 reverse the procedures
outlined in steps 1 through 10.

AC Input

I

.

v

DC output

Figure 5-2. Power Supply Exploded View

/

-rY’* Decorative Strip
I

--I- Motherboard

(706-321)

Bracket (Supply to side panel)

Green Ground Wire

(Supply to rail)

706-342

i

-L

l/O Board to Motherboard

I

Cable Connector

(Ji 009)

Display Board

Display Board to Motherboard

Cable Connect (Jl 010)

IEEE to motherboard

cable connector (J-i 011)

’ \

Model 706

Front Panel

Figure 5-3. Model 706 Top View

5.5 TROUBLESHOOTING

The troubleshooting instructions contained in this section are
intended for qualified personnel having a basic understanding
of analog and digital circuitry. The individual should also be
experienced at using typical electronic test equipment as well
as ordinary troubleshooting procedures. The information
presented here has been written to assist in isolating a defec­tive circuit or circuit section; isolation of the specific compo­nent is left to the technician.

5.5.1 Recommended Test Equipment

The recommended test equipment to troubleshoot the Model
706 is listed in Table 5-4. The test equipment may vary but
the specifications must be at least equal to the specifications
listed in Table 5-4.

Table 5-4. Recommended Test Equipment

Equipment

Five function DMM with

0.05% basic DC accuracy
(Keithley Model 179A or
equivalent)

Dual trace, triggered-

sweep oscilloscope, DC to

20MHz bandwidth

Use

Power supply and DC
voltage checks, contin­uity, logic levels.

Waveform checks

1

LRRRRRRI

If the CRC reveals a problem the Model 706 displays the
following:

ua000a

/ 1

This display indicates that there is a problem with the Model
706’s ROM circuitry. In either of these two cases, the Model
706’s memory circuitry should be checked. The
problem could be that a memory chip is loose in the

Upon

actuation

forms a digital self test and a CRC of the RAM and ROM cir­cuitry respectively. If the digital self test reveals a problem
with the RAM circuitry the Model 706 displays the following
for approximately 0.5 seconds.

of front panel Program 8 the Model 706 per-

. . . . . .

cause of the

socket.

I-R

After this display the Model 706 displays the following:

I FffII I

I

If the CRC reveals a problem with the ROM circuitry the
Model 706 displays the following for approximately 0.5

seconds.

l-c?

!

5.5.2 Digital Self Test

Upon power-up the Model 706 performs a number of tests
and displays several messages. These tests and messages are
explained in paragraph 2.3. The Model 706, also upon power
up, and upon activating Program 99 performs a digital self
test on the RAM circuitry and a cyclic redundancy check
(CRC) on the ROM circuitry. If the digital self test of the RAM
circuitry reveals a problem the Model 706 displays the follow­ing:

Step Item/Component

S101 Line Switch

1

FlOl Line Fuse

2

JlOOl Line Power

3

AC input to supply. 2 pin Molex Connector

4

+6V supply terminal +6V terminal referenced

5

to the terminal.

Table 5-5.

Power

Required Condition

Set line voltage

Continuity
Plugged into line receptacle: power is on.
Line voltage (100, 120, 220, or 240V)
+6V +5% (5.7V

After this display the Model 706 displays the following:

I FRII I

I

If the self test and the CRC both reveal a problem, the Model
706 displays the RAM
displays the fails message.

When either test does not reveal a problem (using Program 8)

the Model 706 displays the following message that indicates
both tests have passed.

Supply Checks

as

required.

to

6.3V)

and

ROM error messages and then

Remarks

See paragraph 5.3.

Remove fuse to check.

+6V supply

1

5-6

5.5.3 Power Supply Checks
If a problem exists in the Model 706, the power supply should

be checked initially. The power

supply

checks are listed in

Table 55. Use the DMM recommended in Table 5-4 to check

the

various test points. It is also a good idea to check each
supply level with an oscilloscope to be sure there is little or no
noise or ripple.

NOTE

The thermal breaker (TB-3) that is in series with the

. _

AC line and the power supply opens the circuit
when the temperature inside the instrument

reaches 65%. This action shuts off the power to the
instrument. In this case turn the Model 706 off and

Table 5-6. Digital Circuitry Checks

let it cool down for approximately one hour. Then
turn the power back on. The thermal breaker

should

the circuit is closed).

return to normal operation (which means

5.5.4 Digital Circuitry Checks
Problems with the digital circuitry could cause erratic opera-

tion. Check the various components associated with the
digital circuitry, including the IEEE interface, using the infor-

mation in Table 5-6.

5.5.5 Display Board Checks
Check the display board per Table 5-7.

Step

Item/Component

1

U105 pin 8

2

U105 pin 2

3

U105 pin 6

4

U105 pin 40

5

U105 pin 37

6

7

U120 pin 21
U120 pins 2-9

8

Step Item/Component

Activate front panel

1

PROGRAM 8.

J/P1010 pins 9 and

2

14
U203 pin 1

3

U203 oin 8

4

Required Condition
Power On

Remarks

Voltages referenced to

common.

+5v f5% (4.75V to

5.25V)
+4V *20% 13.2V to 4.8V)
+4V &20% (3.2V to 4.8V)

Turn

Model 706 off then

on.

+ 5V digital supply.
MPU Hm line.
MPU NMI line.
RESET line pin 40 remains LO

for about 1 second after

on then goes HI.

1 MHz Squarewave

Also check for system clock on

U103, U120, U102 and U118
pin 11.

100pec negative going

iR0 line.
pulses, variable intervals.
0 to +4V, 2ms Pulses

Display and NVRAM data.

Table 5-7. Display Board Checks

Required Condition

+5v f 5% (4.75V to

5.25V)

digital

power

Remarks

Check to see that all LEDs
are functional. Check that all
annunciators are functional.

If LO, check per
Table 55.
Update Data
Clock

5-7

5.5.6 Interconnect Board Checks
Check the interconnect board per Table 5-8.

5.6 BAlTERY CHARGE

The battery backed up functions (Time, Date, Interval, etc.)
are powered by BTlOl and its associated circuitry when the

Model 706 is turned off. The retention time of the battery
backed up functions and data is typically one month with the
unit turned off. To fully charge the battery it takes approx­imately two weeks (8 hours a day) of normal operation.

5.7 SPECIAL HANDLING OF STATIC SENSITIVE
DEVICES

MOS devices are designed to function at high impedance
levels. Normal static charge can destroy these devices. Table
5-9 lists all the static sensitive devices of the Model 706.
Steps 1 through 7 provide instruction on how to avoid
damaging these devices.

1. Devices should be handled and transported in protective

containers, antistatic tubes or conductive foam.

2. Use a properly grounded work bench and a grounding
wrist strap.

3. Handle devices by the body only.

Table 5-8. Interconnect Board Checks

Step I Item/Component

1.

J1021 through J1030 pins

1 Rewired Conditions 1 Remarks

+6ti +4%

17 and 18 referenced to
pins 5 and 6 (analog
common).

2

Program the Model 706 to scan
channels 1 through 10 at a
two second interval rate.

3

U421 pin 2 +4v *lV

4 U421 pin 5

+4v *lV
5 U421 pin 6 +4v *lV
6 U421 pin 9 +4v &lV

7

U421 pin 12

8

U421 pin 15

9 U421 pin 16

+4v +lV

+4v flV ,

+4v *lV
10 U421 pin 19 +4v flV
11 U422 pin 2 +4v *lV
12 U422 pin 5

+4v *lV *

­NOTE

All the steps in Table 5-8 are referenced to Analog Common.

4. PC boards must be grounded to bench while inserting
devices.

5. Use antistatic solder removers.

6. Use grounded tip soldering irons.

7. After devices are soldered or inserted into sockets they are
protected and normal handling can resume.

Table 5-9. Model 706 Static Sensitive Devices

Circuit

Designation

u103
u105
U106 706-801-*
u107 706-800-*
U108 LSI-58
u109
u115 IC-177
u117
u120 LSI-28
u121 IC-330
u122
U123 IC-251
U124
U127
u301
u303

U42l-U438

Keihtley
Part No.

LSI-54
LSI-2J

LSI-58
IC-149

c-107
IC-102

c-102
IC-130
IC-251
IC-339

Interconnect board supply.

When the mainframe is scan-

ning channel 1. Otherwise OV.

When the mainframe is scan-

ning channel 2. Otherwise OV.

When the mainframe is scan-

ning channel 3. Otherwise, OV.

When the mainframe is scan-

ning channel 4 Otherwise, OV.
When the mainframe is scan­ning channel 5. Otherwise, OV.
When the mainframe is scan­ning channel 6. Otherwise, OV
When the mainframe is scan­ning channel 7. Otherwise, OV.
When the mainframe is scan­ning channel 8. Otherwise, OV.
When the mainframe is scan­ning channel 9. Otherwise, OV.
When the mainframe is scan­ning channel 10. Otherwise, OV.

5-8

SECTION 6

REPLACEABLE PARTS

6.1 INTRODUCTION
This section contains replacement parts information,

schematic diagrams and component location drawings for

the Model 706 scanner.

6.2 PARTS LIST
Parts are listed alpha-numerically in order of their circuit

designations. Table 6-l contains a list of the recommended

spare parts. Table 6-2 contains an index of the schematic
diagrams and component location drawings. Table 6-3 con­tains a parts list for the display board. Table 6-4 contains a
parts list for the mother board. Table 6-5 contains a parts list
for the digital I/O board. Table 6-6 contains a parts list for the
interconnect board. Table 6-7 contains a mechanical parts list
for the Model 706.

6.3 ORDERING INFORMATION
To place an order, or to obtain information concerning

replacement parts, contact your Keithley representative or

the factory. See the inside front cover for addresses. When

ordering, include the following information.

1. Instrument Model Number.

2. Instrument Serial Number.

3. Part Description.

4. Circuit Description (if applicable)
5 .Keithley Part Number

6.4 FACTORY SERVICE
If the instrument is to be returned to the factory for service,

photostat and complete the copy of the service form which
follows this section and return it with the instrument.

6.5 COMPONENT LOCATION DRAWINGS AND

SCHEMATIC DIAGRAMS

Component location drawings and schematic diagrams

follow the replaceable parts list in the order listed in Table 6-l.

Table 6-2. Model 706 Index of Schematics and

nent Layouts

6-l
6-2
6-3
6-4
6-5

6-6
6-7
6-8

Display Board, Component Location
Drawing

Digital

l/O Board, Component Location

Drawing
Mother l3oard, Component Location
Drawing
Interconnect Board, Component Loca-

tion Drawing

Display Board, Schematic Diagram
Digital I/O Board, Schematic Diagram
Mother Board, Schematic Diagram
Interconnect Board. Schematic Diaaram

Compo-

I Pncu

- -a-

6-9

t

6-10
6-11
6-15
6-17

6-19
6-21
6-25

Table 6-l. Model 706 Recommended Spare Parts List

Keithley

Part Number

DD-30

IC-107
IC-206
IC-339

FU-28* 1.25A, 25OV, SLO-BLO, 3AG for 9OV-125V Operation
FU-27* 0.6A, 25OV, SLO-BLO, 3AG for 195V-250V Operation

FU-58 1.25A, 25OV, SLO-BLO, 5mm for 9OV-125V Operation
FU-57

PL-67

R-76-100 Resistor, 1008, 5%, %W, Composition

TF-141

LSI-27 Microprocessor, 6808

LSI-28 Versatile Interface Adapter, SY6522 (VIA)

LSI-54

*Either FU-28 or FU-27 is placed in the kit depending on the line voltage used.

Description
“8” LED Display Digit

Hex Buffer, 4050
Darlington Transistor Array, ULN2003A
Octal “D” type flip flops, 74C374

0.6A, 25OV, SLOBLO, 5mm for 195V-250V Operation
LED Pilot Light

Thick Film Resistor Network on the Digital I/O Board

Asynchronous Communication Interface Adapter (ACIA)
68A50

otv

2
2
4

4
4
4

2
4
2

1
:

6-l

Table 6-2. Display Board Parts List

Circuit
Desig. Description

c201 lOpF, 25V, Aluminum Electrolytic
c202

IOOOpF, lOOV, Ceramic Disc

DS201 f 1, LED Display Digit
DS202 “8” LED Display Digit
DS203 “8” LED Display Digit c2
DS204
DS205
DS206
DS207
DS208
DS209

“8” LED Display Digit
“8” LED Display Digit

_

“8” LED Display Digit E2
“8” LED Display Digit
LED Pilot Light G4 El

LED Pilot Light G3 E2
DS210 LED Pilot Light F2 E2
DS211

LED Pilot Light B2
DS212 LED Pilot Light :: E2
DS213
DS214
DS215
DS216
DS217

0201
Q202
Q203
Q204
Q205
Q206

LED Pilot Light G4 E2

LED Pilot Light G4 C3

LED Pilot Light D3

LED Pilot Light ;: D3

LED Pilot Light

PNP, Silicon Transistor, 2N4355 F5 El

PNP, Silicon Transistor, 2N4355 H5 El TG-90

PNP, Silicon Transistor, 2N4355

PNP, Silicon Transistor, 2N4355 H5 El TG-90

PNP, Silicon Transistor, 2N4355 F5 E2

PNP, Silicon Transistor, 2N4355

0207 PNP, Silicon Transistor, 2N4355 G5
Q208

R201
R202

s201
s202

PNP, Silicon Transistor, 2N4355 G5 E2 TG-90

Thick Film Resistor Network
Thick Film Resistor Network

Switch A3 B2 SW-435

Switch

S203 Switch B3
S204
S205

Switch A3 D2 SW-435

Switch

Location Keithley

Sch Pcb Part No.

D6 c3 c-314-10
c5 c2 C-64-IOOOp

Bl B2 DD-31
c2 B2 DD-30

c2

DD-30
D2 C2 DD-30
D2 D2 DD-30

D2

DD-30

E2

E2

DD-30

PL-67

PL-67

PL-67

PL-67

PL-67

PL-67

PL-67

PL-67

PL-67
H4 E3

PL-67

TG-90

H5 El TG-90

TG-90

z

TG-90
TG-90

TF-165-1
TF-77

G5

SEV D2
SEV Fl

B3

;; ;;:;g

A3 02

SW-435

S206 Switch 84 E2 SW-435
S207 Switch 84 E2
S208

Switch A4 B3 SW-435
s209 Switch A4 C3
s210 Switch B4 D3

SW-435
SW-435

SW-435
s211 Switch B4 D3 SW-435
s212 Switch A4 SW-435
S213 Switch

A4

zi

SW-435
S214 Switch B5 F2 SW-435
S215 Switch B5
S216 Switch A5
S217

Switch A5 F2 SW-435

;; E::;

S218 Switch A3 F2 SW-435
s219
s220

Switch B3 G2
Switch

B3 F3 SW-435

SW-435
s221 Switch A2 F3 SW-435

s222

Switch . A2 G3 _ SW-435

6-2

+

Table 6-2. Display Board Parts List (Cont.)

Circuit.

Desig.

Description

S223 Switch
S224 Switch
s225

u201
u202
U203
U204

Switch

MOS to LED Segment Driver, 75392

MOS to LED Segment Driver, 75492
a-bit shift register, LSiE4
MOS to LED Segment Driver, 75492

Jumper
Jumper

Circuit.
Desig. Description

BTI 01

Battery, 3.6V, 1 OOmAH Nicad E4-i/E4

Table 6-3. Mother Board

Parts List

Location Keithley

SchlPcb

Part No.

B2fF3 SW-435
B2/F3

A2lG3

SEVIB3
SEV/G3

SW-435
SW-435

C-169

K-1 69
SW/D3 IC-7.27
SEV;E3 IC-‘. 69

EYID2
E?iDi

Location

SchlPcb

G-3
J-3

Keithley

Part No.

BA-36

G4-2/B3

Cl01 C5-2/C3 C-237-.1

Cl02

Cl03

Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film

C6-2lC3

C-237-. 1

Capacitor, 0.1 LJF, 5OV, Ceramic Film B4-2fD3 C-237-.1
Cl 04 Capacitor, 0.1 uF, 5OV, Ceramic Film E2-l/E3 C-237-.1
c105 Capacitor, 1 OuF, 25V, Aluminum Electrolytic
Cl06 Capacitor, O.luF, 5OV, Ceramic Film
Cl07
Cl08
Cl09
Cl 10
Cl11
Cl12
Cl13
Cl14
Cl 15
Cl16
Cl17
Cl18
Cl19

Capacitor, Q.luF, WV, Ceramic Film
Capacitor, O.luF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film G&2X3 c-237-. 1
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film .
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 3ppF, I OOOV, Ceramic Disc
Capacitor, 33pF, 1 OOOV, Ceramic Disc
Capacitor, O.iuF, 5OV, Ceramic Film
Capacitor, 4.7uF, 25V, Aluminum Electrolytic

Capacitor, 1 OpF, 1 OOOV, Ceramic Disc
Cl 20 Capacitor, 22pF, 1 OOOV, Ceramic DISC
Cl21 Capacitor, 1 OOOpF, 1 OOOV, Ceramic Disc
Cl22
Cl23

Capacitor, .luF, 5OV, Ceramic Film

Capacitor, .I u F, 5OV, Ceramic Film
Cl24 Capacitor, .I uF, 5OV, Ceramic Film

D3-2iE3
E3-2 E3

F3-Z’F3

AZ-l/F3

;:;$lp

C-237-11
C-237-.1

G6-2164 C-237-.1

E5-2/C4

c-237-. 1

E6-2/C5 C-237-, 1
G I-2/C4 C-237-. 1
A4-2/D4
A4-2lD4
Al -2/D4

E4-l/F4

C-237-.T
c-s4-33p
c-64-33p

C-237-.f

G5-I/F4 c-3 14-4.7
G&l/F4 . C-64-70~

F5-1 IF4
E I-21F3

C-64-22~

C-64-I ooop

G5- l/F4 C-237-.1

C6-l/G4 C-237-. 1

E4-i/E4

C-237-.1

CR101 Diode, Silicon, 1 N914
XII02
SRI03

Bridge Rectifier, VMl8

Bridge Rectifier, VMI 8
SRI04 Not Used
X105
CR1 06

Rectifier, Silicon, I N4139

Rectifier, Schottky Barrier, I N5820 E3--i/D5 RF-53

XI 07 Diode, Silicon, 1 N914
11007 Connector, 5 pin molex

J1009

Connector, 5 pin molex
11010 Socket (Displa Board)
JiOll Socket (IEEE able)
J1020

Socket (Interconnect Board}

z

Power Supply

. +

B3-2lD3
D6-2lD4

C6-2:D4

E3-l:D5

RF-28
RF-52
RF-52

RF-34
E4-l/E4 RF-28
I=& 2 %4

H5-l/E4

CS-288-5

CS-288-5
F6-2X5 SO-65
H6-2.‘B4

SO-68

Dl-l/G3

FG-l:-

sz;4°

63

Table 63. Mother Board Parts List Gont.1

Circuit
Desig .

QlOl

0102

RlOl
R102
R103
R104
R105
R106
R107

R108

R109

RllO

Rlll
R112
R113
R114
R115
R116
R117
R118
R119
R120
R121
R122
R123
R124
R125 NOT USED
R126 NOT USED
R127
R128
R129
R130

SlOl Line Switch

TKlOl

UlOl

iJ102

u103
u104
u105
U106
u107
U108
u109
UllO
Ulll
u112
u113
u114
u115
U116
u117
U118

Description

NPN, Silicon Transistor, 2N3904
PNP, Silicon Transistor, 2N3906

Resistor, 3.3k, 5%, %W, Composition
Thick Film Resistor Network

NOT USED
Resistor, 3.3k, 5%, XW, Composition
Resistor, 3.3k, 5%, $W, Composition
Resistor, 3.3k, 5%, XW, Composition
Resistor, 3.3k, 5%, SW, Composition
Resistor, lOOn, 5%, ?bW, Composition
Resistor, lOOR, 5%, XW, Composition
Resistor, lOOa, 5%, Y,W, Composition
Resistor, lOOn, 5%, XW, Composition
Resistor, 3.3k, ‘/4 W, Composition
Resistor, 1 k, 5%, WW, Composition
Resistor, lOOk, 5%, XW, Composition
Resistor, 51 k, 5%, % W, Composition
Resistor, 5.23k, 1%, 1/8W, Metal Film
Resistor, 88.7k, 1%, 1/8W, Metal Film
Resistor, 30k, 1%, 1/8W, Metal Film
Resistor, lOk, 556, WW, Composition
Resistor, lOOk, 5%, XW, Composition
Resistor, lOk, 5%, XW, Composition
Resistor, 1500, 5%, 1/W, Composition
Resistor, 15k, 5%, ‘/rW, Composition
Resistor, 4.7k, 5%, XW, Composition

Resistor, lOk, 5%, 1/W, Composition
Resistor, lOk, 5%, 1/W, Composition
Resistor, lOk, 596, XW, Composition
Resistor, lOk, 5%, XW, Composition

Thermal Breaker

GPIB Octal Transceiver, SN75161

GPIB Adapter, 9914

Asynchronous Communications interface Adapter, 68A50

Octal Buffer/Line Driver, 74LS244
Microprocessor, 6808
EPROM, 2764
EPROM, 2764
CMOS RAM, HM6116
CMOS RAM, HM6116
Octal Buffer/Line Driver, 74LS244
Decoder/Demultiplexer, 74LS138
Decoder/Demultiplexer, 74LS138
GPIB Octal Tranceiver, SN75160
Quad Zinput NAND, 74LSO0

Threshold Detector, iCL8211

Decoder/Demuitiplexer, 74LS138
Quad Bi-lateral Switch, 4066
Octal Buffer/Line Driver, 74LS244

.-

Location

Sch Pcb
E4-1 E4

E3-1 E4 TG-84
G4-2 C3

SEV c3

83-2 D3
B3-2 D3
83-2 D3
B2-2 D4
E6-2 D4
D6-2 D4
D6-2 D4­D6-2 D4
D6-2 D4
E4-1 E3
El-2 E3
E2-1 E3
Dl-1 E3
D2-1 E3
D2-1 E3
Fl-2 E3 R-7610k
Fl-2 E4
F5-1 E4
E4-1 E4
04-l E4
D4-1 E4

G51 F4

F5-1 F4
F4-1 F4
F4-1 F4

G2-1 ­Gl-1
G4-2 82

G5-2 B3
D5-2 C2­C5-2 C3

A2-2 D3

82-2 03
D3-2 E3 706-800-*
E2-2 E3
F2-2 F3

Al-l F2

C4-1 G2
C51 G2
G5-2 83
SEV c3

K E IC-182
El-2 F3

B3-1 F3

~~-17 m-3

Keithley
Part No.

TG-47

R-763.3k

TF-99
R-763.3k

R-763.3k

R-763.3k
R-763.3k
R-76-100

R-76100
R-76100

R-76100

R-763.3k

R-761 k

R-76100k

R-7651 k

R-88-5.23k

R-88-88.7k

R-88-30k

R-76100k

R-7610k

R-76150

R-7615k

R-76-4.7k

R-7610k

R-7610k

R-7610k

R-7610k

SW-420

ic-299

LSi-49

LSI-54

IC-230

LSI-27

706~801-*

LSI-58

LSI-58

IC-230

IC-182

IC-182

IC-298

IC-163

ic-177

ic-149

IC-230

“Order same software as presently installed. For example, if Al

is displayed on power-up, order 706-801 -Al for U106.

wi

.

Table 63: Mother Board Parts LietWmt.)

..--_-

Circuit
Desig.

u119
u120
u121
u122
U123
U124
U125
U126
U127

Description
Decoder/Demultiplexer, 74LS138

Versatile Interface Adapter, SY6522

Clock/Calendar, UPD 1990 AC
Hex Buffer, 4050

8 stage shift register, 14094

Quad 2-input NAND, 4011
Hex inverter, 74LSO4
Buffer Gates, 74LS125
Quad 2-input NAND, 4011

-YlOl Crystal, 4MHt
Y102 Crystal, 32.768kHz

The mother board schematic is spread out over two pages. The location of the

components on which page is noted by the dash numbers in the location.

Circuit

Desig .

c301
C302
c303

CR301
CR302
CR303
CR304

Q301

R301
R302
R303
R304
R305
R306

u301
U302
u303
u304
u305

Description

Capacitor, O.lpF, 5OV, Ceramic Disc
Capacitor, O.lpF, 5OV, Ceramic Disc
Capacitor, O.lpF, 5OV, Ceramic Disc

Bridge Rectifier, VM18 E4 D3
Bridge Rectifier, VM18 D4 03 RF-52
Bridge Rectifier, VM18
Bridge Rectifier, VM18

NPN, Silicon Transistor, 2N3904

Thick Film Resistor, Network
Thick Film Resistor Network

Resistor, 683, lo%, HW, Compositon

Thick Film Resistor Network

Resistor, 2.2k, 5%, XW, Composition
Resistor, 5.1 k, 5%, ‘/4 W, Composition R-765.lk

8 stage shift register, 4021
Quad Binput NOR, 74LSO2 S% D2 IC-179
8 stage shii register, 14094

Hex inverter. 74LSO4

1 Hex inverter; 74LSO4

NOTE

Table 6-4. Digital i/O Board Parts List

I Location

-s-l-z- C-237-. 1

’

Location

scii
Cl-1

Pcb Part No.

G3 ICI-182

E5-2 C4 LSI-28
G5-2 F4 ic-330
c6-1

G4 IC-107
E5-1 F4
SEV F4

F4 ic-186

:g F4

SEV B4

A3-2 D3

G4-1 F4

Keithiey

Sch Pcb Part No.

F2 D3 C-237-. 1
F3 D2 C-237-. 1

RF-52

E4 D3 RF-52

D4 E3 RF-52
c3 E2 TG-47

SEV c2 TF-90
SEV c2 TF39

R-l-68
TF-141
R-762.2k

D2 IC-130

E2 IC-251
SE E2 ic-186
SEV E3 1 ic-186

Keithieii;

IC-251
ic-102

IC-336
ic-102

CR-10
CR-20

+

Table 6-5. Interconnect Board Parts List

Circuit.
Desig.

c401
C402
c403
c404
c405
C406
c407
C408
c409
c410
c411
C412
c413
c414
c415
C416
c417
C418
c419
C420
C421

J1021
J1022
J1023
J1024
J1025
J1026
J1027
J1028
J1029
J1030

Description

Capacitor, 1 OuF. 25V, Aluminum Electrolytic
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 1 OuF, 25V, Aluminum Electrolytic
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, O.luF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OV, Ceramic Film
Capacitor, 0.1 uF, 5OOV, Ceramic Disc

Card Edge Connector
Card Edge Connector
Card Edge Connector
Card Edge Connector
Card Edge Connector
Card Edge Connector

Card Edge Connector
Card Edge Connector
Card Edge Connector
Card Edge Connector

Location

SchlPcb Part No.

;;:;;g

F4-3lC3 C-237-. 1

G4-3/C3 C-237-.1

C4-3lD3 C-237-. 1
D4-3fE3 C-237-. 1

F4-2lE3 C-237-. 1
G4-2lF3 C-237-. 1
C4-i/G3 C-237-. 1

E4-l/G3 C-237-. I
A4-3lA4 c-314-10
D2-3lA4 C-237-. 1

F2-3/B4 C-237-. 1
A2-Z/C4 C-237-. 1
C2-2lD4 C-237-. 1

E2-2lE4
FZ-Z/E4 C-237-.1

B2-l/F4
D2-1 /G4 c-237-.1
B2-3/G4
A4-3lA2 C-237-.01

D5-31B2 CS-454-2

E5-5/B2 CS-454-2

G5-3iC2 CS-454-2

A6-2lD2
C6-2:D2 CS-454-2
D6-2/E2

F6-2lF2 CS-454-2
H6-2/F2 CS-454-2
B6-liG2 CS-454-2
D6-l/H2

Keithley

c-314-10

C-237-.1

c-237-.1
C-237-.1
C-237-.1

CS-454-2
CS-454-2

CS-454-Z

R401

u401
U402
u403
u404
u405
U406
u407
u408
u409
u410
u411
u412
u413
u414
u415
U416
u417
U418
u419
U420
U421
U422
U423

Resistor, 220K, 5%, 1/4W, Composition
Darlington Transistor Array, ULN2003

Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003 .
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003

Darlington Transistor Array, ULN2003
Not Used
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003

Darlington Transistor Array, ULN2003

Darlington Transistor Array, ULN2003

Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
Darlington Transistor Array, ULN2003
l$hn~~dn Transistor Array, ULN2003

Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374

A4-3’A2 R-76-220K
E4-3lB2

FZ-3/C2 IC-206
B4-2iC2 IC-206

C4-2/D2 IC-206

E4-2;DZ
F4-2!E2
B4-l/F2

C4-l/G2

E3-T/G2
D4-3lB3 IC-206

E4-3lC3
G4-3iC3 IC-206
C4-2lD3 IC-206

D4-2/E3

E4-2:E3
G4-2iF3 IC-206
C4-1 IG3
D4-l/G3 IC-206

D2-3!A4 IC-339

E2-3iB4 K-339

F2-3;B4 IC-339

IC-206

IC-206
IC-206
IC-206

;g:;;:

IC-206

I::;;;
IC-206

6-6

+

Table 6-5. Interconnect Board Parts List

Circuit.
Desig. Description

U424
U425
U426
U427
U428
u429

u430
u431
U432
u433
u434
u435
U436
u437
U438

Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374

Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 746374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 746374
Octal “D” Type Flip Flop, 74C374
Octal “D” Type Flip Flop, 74C374

NOTE

The interconnect board schematicconsists of three pages. The location of the

components on which page is noted by the dash numbers in the location
schematic column.

Table 6-6. Model 706 Mechanical Parts List

Location

SchlPcb

Keithley
Part No.

G2-3lC4

B2-2X4 c-339
B2-2lD4 c-339

C2-2/D4 IC-339

D2-2/D4
E2-2lE4
F2-2iE4

G2-2lE4

B2-l/F4
B2-l/F4
C2-l/F4
D2-l/G4
C2-3/G4
B2-3IG4
A2-3lH4

K-339

IC-339
IC-339
IC-339
IC-339
IC-339
IC-339
16-339
c-339
IC-339
c-339

Description

Side Panel Assembly
Front Bezel Assembly
Front Bezel Assembly (Modified)
Front Panel (contains a and b)
a. #2-56-l/4 Long Pem stud
b.;;d4-; x 7/l 6 long clinch standoff

Front Panel Overlay

AC Line Switch (Sl 01)

Pushbutton, Red
Connector, Plug
Connector, Pin

Cable Assembly, Display Board (PI 010)

Pushbutton, Yellow Brown

Pushbutton, Light Brown

Pushbutton, Brown

Pushbutton, Dark Brown

Cable Assembly, IEEE (P1011)

$ $Z;ector (J1002)

Fuse Holder, Body

Fuse Carrier
a. 5mm size
b. 3AG size

Line Filter (JlOOl)
Connector, Receptacle (J1018)

Connector, Pin

Mounting Hardware, IEEE

Rear Panel Assembly

BNC Connector (J1003-J1006)

Keithley

my.

2 706-301

1

:
4
2 ST-1 55-1

1 SW-420
1 29465-3

:

1
:

12 31470-7

:
;

1

1

2

: 706-309

4 cs-249

Part No.

706-303
706-304
706-305

706-307

CS-325-2

CS-246
CA-l 5-2
31470-4
31470-5
3 1470-6

CS-467
CA-21 -1

FH-24
FH-26

FH-25

LF-2

CS-326-2

CS-245
CS-378

+

6-7

Description

+

Table 6-6. Model 706 Mechanical Parts List (Cork)

Qty.

Keithley
Part No.

Connector, Receptacle (JIOI 3 to PS-17)
Connector
Connector, Plug (PI 015)
Connector (to PI 015)
Connector, Receptacle (Ji 015)
Connector (to Jl 015)
Connector (P1007)
Connector
Grommet (Insulates l/O Board from case)
Mounting Rail Assembly
Card Guide

Interconnect Board/Mounting Rail Assembly
a. Mounting Rail Assembly
b. Board Support Bracket

Interconnect Bracket to Mounting Rail Screws
#6-32-5/16 long Phillips Pan Head Screw

Interconnect Board Cable Assembly (PI 020)

Interconnect Board Connector (J1021 through JlO30)

Fastener, Scanner Card Shields
Shield

Mother Board to Mounting Rail and Front Bezel screws
#6-32 x l/4 Long Phillips Pan Head Screws
Mounting Rails to Side Panels Screws
#I O-32 x 3/8 long Phillips Pan Head Screws
Socket, Display Board (JlOlO)
Socket, IEEE cable (Ji 011)
Socket, Interconnect Board (J1020)
Socket, U106 and U107
Contact, I/O Board (PI 009)
Connector, I/O Board

Bracket, I/O Board
a. Pem Nut, #6-32

b. Standoff, #6-32

I/O Board to I/O Bracket Screws
#4-40 x l/4 Phillips Pan Head Screw

I/O Board to Mounting Rail Screw
#6-32 x l/4 long Phillips Pan Head Screw

Bracket, Power Supply to side panel

Cable Clamp

Power Supply Bracket to Side Panel Screws
#I O-32 x 3/8 long Phillips Pan Head Screw

Support, Power Supply to mounting rail
Spacers, Power Supply to bracket

Rear Bezel
Top Cover

Bottom Cover

Rear Foot

Front Foot

Decorative Strip Assembly

Line Cord (PI 001)

Line Cord (European)

Card Edge Connector

Label for Rear Bezel Bottom

1

CS-326-2

2 CS-245

CS-325-4

:

1

4

CS-246
CS-326-4
CS-245

CS-287-5
A
2

CS-276

28479-5

706-311
1

2
2

706-315

706-311

706-314

6
1

CA-20-1

CS-454-2

ii
10

FA-99

706-312

6

12

SO-65

:

SO-68

1 SO-84-40
2
5

1

1

SO-69
CS-276
CS-287-5

706-323
2
2
2

2

1 706-336

2 CC-1 8
2

1 706-342

2

ST-1 77-1

2 706-313

1 706-319
1 706-320

2 706-316

706-3 17

2 706-321

1
1

co-7

CO-26
1 CS-444-2
1

MS-343

6-8

+

(

3 0

4

5

I

,Figure 6-1. Display Board, Component Location Drawing, Dwg. No. 706-110

c

I

1

I-

9

-

5

v

4

E

Figure 6-2. Digital I/O Board, Component Location Drawing, Dwg. No. 706-170

Z

c

w-­a----

@--

., I. ,,

B

a---

I ”

T *

Figure 63. Mother Board, Component Location

Drawing, Dwg. No. 706-100 Isheet 2 of 2)

0

r’

II II

II II

I

,

10

(D

DS201[

C

ix202

DS203

I------/

DS204 1 DS205 j+ OS206

117

I-

VI201

DS207 l ,

I

C

i

cc

C

II

,I

(

4

!

Q,

I

-

----ii ---ii

I I#

53

61716-18

9LI-90L I

A

8

c

e -

Figure 6-6. Digital I/O Board, Schematic Diagram.

Dwg. No. 706176

L L

1 1

-

1

f

-

c

Figure 67, Mother Board, Schematic Diagram.

Dwg. No. 706-106 (sheet 1 of 21

6-ni6-22

I I-

I

‘11

I

-

-

-

-

-

Figure 68. Interconnect Board, Schematic Diagram,

Dwg. No. 706-166 (sheet 1 of 3)

6-261626