Tektronix System 40 Custom Coaxial RF Signal Routing Systems Instruction Manual Rev. C Instruction Manual

System 40

Custom Coaxial RF

Signal Routing Systems

Instruction Manual

Contains Operating and Servicing Information

W ARRANTY

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 Keithle y representative, or contact Keithle y 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 fo r
the balance of the original warranty period, or at least 90 days.

LIMIT A TION OF W ARRANTY

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.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, 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 OR 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. • 28775 Aurora Road • Cle v eland, OH 44139 • 440-248-0400 • Fax: [phone] • http://www.keithley.com

BELGIUM: Keithley Instruments B.V. Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02/363 00 40 • Fax: [phone]
CHINA: Keithley Instruments China
FRANCE: Keithley Instruments Sarl B.P. 60 • 3, allée des Garays • 91122 Palaiseau Cédex • 01 64 53 20 20 • Fax: [phone]
GERMANY: Keithley Instruments GmbH Landsberger Strasse 65 • D-82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Keithley Instruments Ltd
INDIA: Keithley Instruments GmbH Flat 2B, WILOCRISSA • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Keithley Instruments s.r.l. Viale S. Gimignano, 38 • 20146 Milano • 02/48 30 30 08 • Fax: [phone]
NETHERLANDS: Keithley Instruments B.V. Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWITZERLAND: Keithley Instruments SA Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: Keithley Instruments Taiwan 1 Fl. 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3572-9077• Fax: [phone]

Y uan Chen Xin Building, Room 705 • 12 Yumin Road, Dew ai, Madian • Beijing 100029 • 8610-62022886 • Fax: [phone]

The Minster • 58 Portman Road • Reading, Berkshire RG30 1EA • 0118-9 57 56 66 • Fax: [phone]

10/99

System 40 Custom Coaxial RF Signal Routing Systems

Instruction Manual

©1999, Keithley Instruments, Inc.

All rights reserved.

Cleveland, Ohio, U.S.A.

Third Printing, March 2000

Document Number: 40MWS-901-01 Rev. C

Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision
Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revi­sions, contain important change information that the user should incorporate immediately into the manual. Addenda are num­bered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of the manual are
incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this print history page.

Revision A (Document Number 40MWS-901-01)..............................................................................January 1999

Revision B (Document Number 40MWS-901-01)................................................................................March 1999

Revision C (Document Number 40MWS-901-01)................................................................................March 2000

All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered trademarks of their respective holders.

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 recog­nize shock hazards and are familiar with the safety precautions re­quired to avoid possible injury. Read the operating information
carefully before using the product.

The types of product users are:

Responsible body is the individual or group responsible for the use

and maintenance of equipment, for ensuring that the equipment is
operated within its specifications and operating limits, and for en­suring that operators are adequately trained.

Operators use the product for its intended function. They must be

trained in electrical safety procedures and proper use of the instru­ment. They must be protected from electric shock and contact with
hazardous live circuits.

Maintenance personnel perform routine procedures on the product

to keep it operating, for example, setting the line voltage or replac­ing consumable materials. Maintenance procedures are described in
the manual. The procedures explicitly state if the operator may per­form them. Otherwise, they should be performed only by service
personnel.

Service personnel are trained to work on live circuits, and perform

safe installations and repairs of products. Only properly trained ser­vice personnel may perform installation and service procedures.

Users of this product must be protected from electric shock at all
times. The responsible body must ensure that users are prevented
access and/or insulated from every connection point. In some cases,
connections must be exposed to potential human contact. Product
users in these circumstances must be trained to protect themselves
from the risk of electric shock. If the circuit is capable of operating
at or above 1000 volts, no conductive part of the circuit may be

exposed.

As described in the International Electrotechnical Commission
(IEC) Standard IEC 664, digital multimeter measuring circuits
(e.g., Keithley Models 175A, 199, 2000, 2001, 2002, and 2010) are
Installation Category II. All other instruments’ signal terminals are
Installation Category I and must not be connected to mains.

Do not connect switching cards directly to unlimited power circuits.
They are intended to be used with impedance limited sources. NEV ­ER connect switching cards directly to A C mains. When connecting
sources to switching cards, install protective devices to limit fault
current and voltage to the card.

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 jump­ers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.

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. A good safety practice is to expect

that hazardous voltage is present in any unknown circuit bef ore
measuring.

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.

The instrument and accessories must be used in accordance with its
specifications and operating instructions or the safety of the equip­ment may be impaired.

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.

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.

If a screw is present, connect it to safety earth ground using the
wire recommended in the user documentation.

!

The symbol on an instrument indicates that the user should re­fer to the operating instructions located in the manual.

The symbol on an instrument shows that it can source or mea­sure 1000 volts or more, including the combined effect of normal
and common mode voltages. Use standard safety precautions to
avoid personal contact with these voltages.

The WARNING heading in a manual explains dangers that might
result in personal injury or death. Alw ays read the associated infor­mation very carefully before performing the indicated procedure.

The CAUTION heading in a manual explains hazards that could
damage the instrument. Such damage may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and
all test cables.

To maintain protection from electric shock and fire, replacement
components in mains circuits, including the power transformer, test
leads, and input jacks, must be purchased from Keithley Instru­ments. Standard fuses, with applicable national safety approvals,
may be used if the rating and type are the same. Other components
that are not safety related may be purchased from other suppliers as
long as they are equivalent to the original component. (Note that se­lected parts should be purchased only through Keithley Instruments
to maintain accuracy and functionality of the product.) If you are
unsure about the applicability of a replacement component, call a
Keithley Instruments office for information.

T o clean an instrument, use a damp cloth or mild, water based clean­er. Clean the exterior of the instrument only. Do not apply cleaner
directly to the instrument or allow liquids to enter or spill on the in­strument. Products that consist of a circuit board with no case or
chassis (e.g., data acquisition board for installation into a computer)
should never require cleaning if handled according to instructions.
If the board becomes contaminated and operation is affected, the
board should be returned to the factory for proper cleaning/servic­ing.

Rev.10/99

Table of Contents

1 Installation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

System 40 installation guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Fixed rack installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Rack mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Shelf mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 Operation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Power limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Switch life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Model 7020-MWS 7020 QCC specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Model 7020-MWS 96-pin DIN connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Model 7020-QCC 96-pin DIN connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

3 Service

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Troubleshooting equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Troubleshooting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Factory service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

i

List of Illustrations

1 Installation

Figure 1-1 Fastener installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Figure 1-2 Mounting kit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 Operation

Figure 2-1 Tree switching network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2 96-pin DIN connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

List of Tables

1 Installation

Table 1-1 System 40 rack assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Operation

Table 2-1 Model 7001 channels and memory locations for 1x6 multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Table 2-2 Output channel terminal identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Table 2-3 Input channel terminal identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Table 2-4 Miscellaneous terminal identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Table 2-5 Model 7020-MWS 50 pin header connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Table 2-6 Miscellananeous terminal identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Table 2-7 Output channel terminal identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Table 2-8 Input channel terminal identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Table 2-9 Miscellaneous terminal identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

3 Service

Table 3-1 Troubleshooting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

ii

iii

1

Installation

Introduction

System 40 Custom Coaxial RF Signal Routing Systems provide an integrated signal routing solution designed and built to cus­tomer specifications. The System 40 typically includes a Keithley Model 7001 or 7002 switch control unit, microwave coaxial
switches, a power supply , and a 19-inch rack mount assembly. The IEEE-488 compatible switch controller operates the coaxial
switches and provides an easy to read display of switch status. Switch control algorithms are pre-programmed and stored in the
switch control unit’s non-volatile memory at the factory. If desired, the switch system can be reconfigured by reprogramming
the controller for new applications.

Due to the custom nature of the System 40, this Instruction Manual contains general system instructions. Specific information
for your system is provided in the as-built documentation package.

System 40 documentation consists of:

• System 40 Custom Coaxial RF Signal Routing Systems Instruction Manual

• Model 7001 or 7002 Switch System Manual

• Additional Keithley standard product manuals per system configuration

• As-built documentation package including:
— Component list

— Wiring list
— Programming list

W arranty

Warranty information is located at the front of this manual. Note that coaxial switches are warranted for a period of one
year or their specified lifetime.

System 40 installation guidelines

WARNING

CAUTION

The information on the following pages is intended for qualified service personnel
only. Do not attempt these procedures unless you are qualified to do so.

To prevent flexing of the connections and possible damage, ensure that the Model
7020-MWS card is secured with its thumbscrew to the Model 7001/2 rear panel, and
that the cable assembly is secured with its two screws to the 7020-MWS card.

1-1

Installation

Fixed rack installation

System 40 systems are either shelf mounted or mounted directly in a rack.

Rack mount

Table 1-1

System 40 rack assembly parts

Keithley

Quantity Description

2 Bracket, rear support BR-21B Attaches chassis rear to rear rack rails.

part number Function

4 10-32 ×
8

8

Fastener, captive nut
10-32 ×

⅜

Phillips pan head screw 10-32x3/8 PPH Attaches rear support brackets to chassis.

⅝

Phillips pan head screw

FA-148
10-32x5/8 PPH

Attaches rear support brackets and front
panel to rails.

Parts list

Table 1-1 lists the supplied parts required to rack mount a typical System 40 chassis.

Rack preparation

1. Select a location in the rack.

2. Hold up the system at the selected location in the rack. The four slotted mounting holes in the front panel dictate the location
of the captive nut fasteners on the front rack rails. Mark where the fasteners are to be installed.

3. Referring to Figure 1-1, install four fasteners so the captive nuts are located behind the appropriate holes on the front rack rails.

Figure 1-1

Fastener installation

Front Rack

Rail

1-2

Typically

Fasteners

2 1/4"

System installation

Refer to Figure 1-2 to install the chassis and support brackets in the rack.

Figure 1-2

Mounting kit installation

Front Panel

Installation

3 1/2" Instrument

Chassis

10-32 x 3/8 PPH

&

#10-32 Kepnut

24V Power Supply

Ground Cable

1. Loosely attach the rear support brackets to the chassis with kepnuts and 10-32 ×

Rear Support Bracket (2)

Clamp for

3 1/2" Instrument

⅜

screws.

2. Position the chassis assembly in the rack to adjust the support brackets, and note the location for the captive nut fasteners
on the rear rack rails.

3. Install four fasteners so the captive nuts are located behind the appropriate holes on the rear rack rails.

4. Loosely attach the chassis assembly to the front and rear rack rails with 10-32 ×

⅝

screws. Secure the rear support brackets

to the chassis.

5. Tighten all screws.

WARNING

The System 40 must be separately connected to a safety earth ground to maintain pro­tection against possible shock hazard. Failure to connect the unit to a safety earth
ground may result in personal injury or death due to an electric shock.

Shelf mount

Rack preparation

1. Select a position in the rack. In most cases, the weight of the System 40 dictates a position in the lower half of the rack.
The System 40 typically takes up 10.5” of vertical space.

NOTE

2. Install chassis support assemblies in the rack and secure them.

3. Lift the System 40 onto the chassis supports and slide it into the rack.

4. The chassis can be secured to the front rack flanges with binder head screws.

System earth ground installation

1. Remove all power from the system.

2. Connect the loose end of the six foot green/yellow ground cable to a quality ground located within your facility using the
#10 screw provided.

The chassis must be mounted at a height that is an increment of 1

¾

”

from the top or bottom
of the rack. Attempting to mount the mainfr ame at a non-incremental height will lead to dif­ficulties with hole alignment.

1-3

Installation

Power and control connections

Line power, switch control signals and computer control signals must be connected prior to system operation. RF switch control
signals are connected from the 7020-MWS\QCC switch card, installed in the 7001/2 mainframe, to the System 40 chassis
mounted RF switch terminals using a ribbon cable terminated with a 96-pin DIN connector. One piece System 40’s may be
shipped from the factory with this cable connected, two piece systems must be connected after rack installation. The ribbon
cable 96-pin DIN connector label identifies the mating 7020-MWS connector. Secure the connectors by tightening the two cap­tive mounting screws located on the ribbon cable connector.

WARNING

CAUTION

5. Connect Model 7001 or 7002 line power and IEEE-488 interface cable as described in the Switch System Manual.

6. Connect the RF switch power supply line cord to the same AC power source circuit as the switch mainframe.

Before beginning any wiring procedures, make sure all power is off.

96-pin DIN connectors must be securely fastened to the 7020-MWS card or damage to
the card may occur.

Coaxial cable installation

System 40 is configured with RF and microwav e connectors suitable for the specified operating frequency range. Mating connec­tors must be clean, must meet connector type interface specifications, and must be tightened to the appropriate torque specification.

WARNING

CAUTION

Contact with exposed conductors carrying RF power may cause burns. Place protec­tive caps on all unused switch inputs. All cables and connectors should be properly
mated and shielded.

Mating connectors with out of tolerance pin depths may destroy the connector. Verify
pin depth before mating connectors.

Coaxial connector cleaning

Connector interfaces must be free of foreign material to prevent performance degradation. Visually inspect the connector using
a 4X to 10X magnifying lens. Try to blow foreign material off the connector using canned air. (Canned air is recommended
due to the presence of moisture and oils in air supplied by standard industrial compressors.) Use a lint free miniature cleaning
swab moistened with clean isopropyl alcohol to wipe off any remaining foreign material.

Coaxial connector mating

1. Remove all power to the system before installing cables.

2. Connect cables to System 40 connectors and tighten using a
Type-N connectors may be connected finger tight. Refer to as-built documentation for other connector types.

CAUTION

1-4

Application of excessive torque may damage connector.

⁵⁄₁₆

inch torque wrench, to 7-10 in.-lb for SMA type connectors.

2

Operation

Introduction

System 40 Custom Microwave Switch Systems are derived from the Keithley Model 7116-MWS. Because each System 40 is
unique, the 7116-MWS will be used to represent a typical configuration for switch system operating principles and troubleshoot­ing procedures.

The Model 7116-MWS system is a 16-input microwav e multiplexer . Sixteen inputs are achieved by connecting five single-pole,
four-throw switches together forming a tree switching network as shown in Figure 2-1.

Figure 2-1

Tree switching network

IN 1

IN 2

IN 3

IN 4

IN 5

IN 6

IN 7

IN 8

IN 9

IN 10

IN 11

IN 12

1!1

1!2

1!3

1!4

1!5

1!6

1!7

1!8

1!9

1!10

1!11

1!12

1!21

1!22

1!23

1!24

OUT

IN 13

IN 14

IN 15

IN 16

1!13

1!14

1!15

1!16

2-1

Operation

Operating instructions

T o select an input channel, the Model 7001 must close tw o switches at the same time. Table 2-1 lists which Model 7020-MWS
digital outputs must be activated to select each respecti ve RF input. The table also sho ws 7001 channels used to select the inputs.

Table 2-1

Model 7001 channels and memory locations for 1x16 multiplexer

7116-MWS

Input

Ch. 1
Ch. 2
Ch. 3
Ch. 4

Ch. 5
Ch. 6
Ch. 7
Ch. 8

Ch. 9
Ch. 10
Ch. 11
Ch. 12

Ch. 13
Ch. 14
Ch. 15
Ch. 16

OUT 1
OUT 2
OUT 3
OUT 4

OUT 5
OUT 6
OUT 7
OUT 8

7020-MWS Digital Outputs

OUT 21
OUT 21
OUT 21
OUT 21

OUT 22
OUT 22
OUT 22
OUT 22

OUT 9
OUT 10
OUT 11
OUT 12

OUT 13
OUT 14
OUT 15
OUT 16

OUT 23
OUT 23
OUT 23
OUT 23

OUT 24
OUT 24
OUT 24
OUT 24

7001

Channels

1!1,1!21
1!2,1!21
1!3,1!21
1!4,1!21

1!5,1!22
1!6,1!22
1!7,1!22
1!8,1!22

1!9,1!23
1!10,1!23
1!11,1!23
1!12,1!23

1!13,1!24
1!14,1!24
1!15,1!24
1!16,1!24

7001

Memory

Location

M1
M2
M3
M4

M5
M6
M7
M8

M9
M10
M11
M12

M13
M14
M15
M16

7116-MWS

RelaysBank A Bank B Bank C Bank D

K1, K5

K2, K5

K3, K5

K4, K5

2-2

Output patterns for each input are stored in the Model 7001 memory at the factory. The user can call up memory locations to
select each input. For example, calling up memory location 1 selects input 1. Some programming examples are listed below.

PRINT #1,"output 7; :close (@ 1!1,1!21)" 'Channels select input 1
PRINT #1,"output 7; :close (@ M1)" 'Memory location 1 selects input 1

NOTE

For further information on operation and programming, refer to the Models 7001 and 7020 Instruction Manuals.

Information stored in non-volatile memory will be lost if power is applied to the switch
mainframe when switch car ds, such as the 7020-MWS, have been remo ved. To assure mem­ory remains as factory programmed, never power up the mainframe with a switch card re­moved.

In either configuration of the Model 7116-MWS, as one 1
rigid jumper cables removed, as five 1
closed per relay, and that no more than two relays are energized simultaneously per bank.

×

4 multiplexers, ensure that only one channel is

×

16 multiplexer or, with the semi-

Operation

Switch life

The life of a switch is usually specified in cycles, that is the number of times it switches from one position to another and back.
System 40 RF switches have liv es from one-million to ten-million (1,000,000 to 10,000,000) cycles per switch position without
noticeable performance degradation.

NOTE

That is:

• No intermittent contacts

• Less than 0.1 dB increase in insertion loss

• Less than 0.3 ohm increase in DC contact resistance

Cold switching (no RF power applied), hot switching (RF power applied) may rapidly
degrade switch performance.

Model 7020-MWS/7020-QCC specifications

Digital I/O
Capability:

Output configuration:
Pull-up voltage:

Maximum sink current:

Current limit:
Collector-emitter:
Logic:
Input configuration:
Characteristics:

Maximum voltage level:
Logic:

40 independent inputs.
40 independent outputs.
40 open collector drivers (channels). Each driver has an internal flyback diode.

5.3 V internally supplied, external connection provided for user supplied voltage,
30V max. Removal of internal jumper allows user to use two different pull-up voltages.
Per Channel: 300mA
Per Card: 2.5A
Output current limited to 500mA per channel.
<1V @ 300mA
Negative true.
40 inputs with internal 10k Ω pull-up resistors.
Input logic low voltage: 0.8V max.
Input logic high voltage: 2V min.
Input logic low current: -600µA max. @0V
Input logic high current: 50µA max. @5V
42V pk.
Positive true.

General
Connector:

Warranty:
Standards:

Environment:

Specifications subject to change without notice.

CAUTION

96-pin DIN
50-pin Header (7020-MWS only)
1 year
Safety: Conforms with European Union Directive 73/23/EEC
EMC: Conforms with European Union Directive 89/336/EEC

Operating:0°C to 50°C, <80% relative humidity: (0° to 35°C)
Storage: -25°C to +65°C

Exceeding the output sink current specifications may cause damage to the Model
7020-MWS/QCC card. This card is not intended for use in applications other than the
System 40.

2-3

Operation

Model 7020-MWS 96-pin DIN connector pinout

Figure 2-2

96-pin DIN connector pinout

View from
pin side of
connector

1234567891011121314151617181920212223242526272829303132

a
b
c

Table 2-2

Output channel terminal identification

Output
channel

OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
OUT16
OUT17
OUT18
OUT19
OUT20

Connector
pin no.

2a
4a
6a
8a
10a
12a
14a
16a
18a
20a
22a
24a
26a
28a
30a
32a
2b
4b
6b
8b

Output
channel

OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
OUT28
OUT29
OUT30
OUT31
OUT32
OUT33
OUT34
OUT35
OUT36
OUT37
OUT38
OUT39
OUT40

Connector
pin no.

10b
12b
14b
16b
18b
20b
22b
24b
26b
28b
30b
32b
2c
4c
6c
8c
10c
12c
14c
16c

2-4

Table 2-3

Input channel terminal identification

Operation

Input
channel

IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
IN10
IN11
IN12
IN13
IN14
IN15
IN16
IN17
IN18
IN19
IN20

Connector
pin no.

1a
3a
5a
7a
9a
11a
13a
15a
17a
19a
21a
23a
25a
27a
29a
31a
1b
3b
5b
7b

Input
channel

IN21
IN22
IN23
IN24
IN25
IN26
IN27
IN28
IN29
IN30
IN31
IN32
IN33
IN34
IN35
IN36
IN37
IN38
IN39
IN40

Connector
pin no.

9b
11b
13b
15b
17b
19b
21b
23b
25b
27b
29b
31b
1c
3c
5c
7c
9c
11c
13c
15c

Table 2-4

Miscellaneous terminal identification

Terminal Connector pin no.

GND

5.3V

5.3V
GND
VEXT1
VEXT1
GND
GND
VEXT2
VEXT2
NC
NC
NC
NC
NC
NC

17c
18c
19c
20c
21c
22c
23c
24c
25c
26c
27c
28c
29c
30c
31c
32c

2-5

Operation

Table 2-5

Model 7020-MWS 50 pin header connector pinout

Output channel terminal identification

Output
channel

OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
OUT16
OUT17
OUT18
OUT19
OUT20

Connector
pin no.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Output
channel

OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
OUT28
OUT29
OUT30
OUT31
OUT32
OUT33
OUT34
OUT35
OUT36
OUT37
OUT38
OUT39
OUT40

Connector
pin no.

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

Table 2-6

Miscellaneous terminal identification

Connector

Terminal

+5.2V
VEXT1
VEXT2
GND
GND
IN1
IN2
IN3
IN4
IN5

pin no.

41
42
43
44
45
46
47
48
49
50

2-6

Model 7020-QCC 96-pin DIN connector pinout

Table 2-7

Output channel terminal identification

Output
channel

Connector
pin no.

Output
channel

Operation

Connector
pin no.

OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
OUT16
OUT17
OUT18
OUT19
OUT20

Table 2-8

Input channel terminal identification

Input
channel

01a
02a
03a
04a
05a
06a
07a
08a
09a
10a
11a
12a
13a
14a
01b
02b
03b
04b
05b
06b

Connector
pin no.

OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
OUT28
OUT29
OUT30
OUT31
OUT32
OUT33
OUT34
OUT35
OUT36
OUT37
OUT38
OUT39
OUT40

Input
channel

07b
08b
09b
10b
11b
12b
13b
01c
02c
03c
04c
05c
06c
07c
08c
09c
10c
11c
12c
13c

Connector
pin no.

IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
IN10
IN11
IN12
IN13
IN14
IN15
IN16
IN17
IN18
IN19
IN20

19a
20a
21a
22a
23a
24a
25a
26a
27a
28a
29a
30a
31a
32a
20b
21b
22b
23b
24b
25b

IN21
IN22
IN23
IN24
IN25
IN26
IN27
IN28
IN29
IN30
IN31
IN32
IN33
IN34
IN35
IN36
IN37
IN38
IN39
IN40

26b
27b
28b
29b
30b
31b
32b
20c
21c
22c
23c
24c
25c
26c
27c
28c
29c
30c
31c
32c

2-7

Operation

Table 2-9

Miscellaneous terminal identification

Connector

Terminal

pin no.

VEXT1
VEXT1
NC
+5.3V
GND
VEXT2
N/C
GND
N/C
GND
VEXT2
+5.3V
N/C
N/C
GND

15a
16a
17a
14b
15b
16b
17b
18b
19b
14c
15c
16c
17c
18c
19c

2-8

3

Service

Introduction

The Keithley Model 7116-MWS is the standard product that the System 40 is deriv ed from. An explanation of its troubleshoot­ing procedure is presented here to demonstrate switch system troubleshooting.

The following paragraphs contain troubleshooting and replacement parts information. Schematic diagrams and component lay­out drawings for the System 40 chassis are in the as-built documentation package. Refer to Model 7001 and 7020 manuals for
further information about these components.

T roubleshooting

WARNING The information in this section is intended for qualified service personnel only. Some of

the procedures may expose you to hazardous voltages that could result in personal injury
or death. Do not attempt to perform these procedures unless you are qualified to do so.

T roubleshooting equipment

The Model 2000 Digital Multimeter is recommended for troubleshooting.

T roubleshooting procedure

Table 3-1 summarizes the procedure for verifying operation of the Model 7116-MWS. Refer to the system schematic and the
chassis wiring diagram for component locations.

3-1

Service

Table 3-1

Troubleshooting procedure

Step Item/component Required condition Comment

1 Chassis All voltages referenced to chassis
2 K1-K5, pin COM < 29VDC Relay coil voltage
3 K1 pin 1, K5 pin 1 < 1.5V Close channel 1
4 K1 pin 2, K5 pin 1 < 1.5V Close channel 2
5 K1 pin 3, K5 pin 1 < 1.5V Close channel 3
6 K1 pin 4, K5 pin 1 < 1.5V Close channel 4
7 K2 pin 1, K5 pin 2 < 1.5V Close channel 5
8 K2 pin 2, K5 pin 2 < 1.5V Close channel 6

9 K2 pin 3, K5 pin 2 < 1.5V Close channel 7
10 K2 pin 4, K5 pin 2 < 1.5V Close channel 8
11 K3 pin 1, K5 pin 3 < 1.5V Close channel 9
12 K3 pin 2, K5 pin 3 < 1.5V Close channel 10
13 K3 pin 3, K5 pin 3 < 1.5V Close channel 11
14 K3 pin 4, K5 pin 3 < 1.5V Close channel 12
15 K4 pin 1, K5 pin 4 < 1.5V Close channel 13
16 K4 pin 2, K5 pin 4 < 1.5V Close channel 14
17 K4 pin 3, K5 pin 4 < 1.5V Close channel 15
18 K4 pin 4, K5 pin 4 < 1.5V Close channel 16

NOTE: See Table 2-1 for information on closing channels.

Ordering information

To place an order or to obtain information concerning replacement parts, contact your Keithley representative or the factory.
When ordering parts, be sure to include the following information:

• Model numbers 7020-MWS, and 7001/2, System 40

• Serial number of the chassis, card, or mainframe, workorder number on System 40 chassis

• Part description

• Circuit designation (if applicable)

• Keithley part number

Factory service

If the System 40 system must be returned to Keithley for repair, perform the following:

1. Call the Repair department at 1-800-552-1115 for a Return Material Authorization (RMA) number.

2. Complete the service form at the back of this manual and include it with the card.

3. Carefully pack the card in the original packing carton.

4. Write ATTENTION REPAIR DEPT and the RMA number on the shipping label.

3-2

Service Form

Model No. Serial No. Date

Name and Telephone No.

Company

List all control settings, describe problem and check boxes that apply to problem.

❏

Intermittent

IEEE failure

❏
❏

Front panel operational

Display or output (check one)

❏

Drifts

❏

Unstable
Overload

❏

Calibration only

❏
❏

Data required

(attach any additional sheets as necessary)

Show a block diagram of your measurement system including all instruments connected (whether power is turned on or not).
Also, describe signal source.

❏

Analog output follows display

Obvious problem on power-up

❏
❏

All ranges or functions are bad

❏

Unable to zero

❏

Will not read applied input

CertiÞcate of calibration required

❏

❏

Particular range or function bad; specify

Batteries and fuses are OK

❏
❏

Checked all cables

Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.)

What power line voltage is used? Ambient temperature? ¡F

Relative humidity? Other?

Any additional information. (If special modiÞcations have been made by the user, please describe.)

Be sure to include your name and phone number on this service form

.

Keithley Instruments, Inc.

28775 Aurora Road
Cleveland, Ohio 44139

Printed in the U.S.A.