Agilent 66311A User Manual

Errata

66311A Mobile Communications DC Source User's Guide
5962-8272

May 1998

Title & Document Type:

Manual Part Number:

Revision Date:

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett­Packard's former test and measurement, semiconductor products and chemical analysis
businesses are now part of Agilent Technologies. We have made no changes to this
manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.

About this Manual

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www.tm.agilent.com

Search for the model number of this product, and the resulting product page will guide
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USER’S GUIDE

HP Model 66311A

Mobile Communications

DC Source

For instruments with Serial Numbers:

HP 66311A: US38180101 and up

HP Part No. 5962-8272

Microfiche No. 5962-8273

Printed in USA: May 1998

Safety Summary

The following general safety precautions must be observed during all phases of operation of this instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no
liability for the customer's failure to comply with these requirements.

GENERAL

This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of
this product may be impaired if it is used in a manner not specified in the operation instructions.

Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.

ENVIRONMENTAL CONDITIONS

This instrument is intended for indoor use in an installation category II, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.

BEFORE APPLYING POWER

Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the instrument's external markings described under "Safety Symbols".

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly
connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective (grounding)
conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in
personal injury.

ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l'appareil.
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.

FUSES

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes.

DO NOT REMOVE THE INSTRUMENT COVER

Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be
made only by qualified service personnel.

Instruments that appear damaged or defective should be made inoperative and secured against unintended
operation until they can be repaired by qualified service personnel.

iii

SAFETY SYMBOLS

Direct current

Alternating current

Both direct and alternating current

Three-phase alternating current

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal is at earth potential. Used for measurement and control circuits designed to be
operated with one terminal at earth potential.

Terminal for Neutral conductor on permanently installed equipment

Terminal for Line conductor on permanently installed equipment

On (supply)

Off (supply)

Standby (supply). Units with this symbol are not completely disconnected from ac mains when
this switch is off. To completely disconnect the unit from ac mains, either disconnect the power
cord or have a qualified electrician install an external switch.

WARNING

Caution

In position of a bi-stable push control

Out position of a bi-stable push control

Caution, risk of electric shock

Caution, hot surface

Caution (refer to accompanying documents)

The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like,
which, if not correctly performed or adhered to, could result in personal injury. Do not proceed
beyond a WARNING sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like,
which, if not correctly performed or adhered to, could result in damage to or destruction of part
or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions
are fully understood and met.

iv

Declaration Page

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer's Name: Hewlett-Packard Company

Manufacturer's Address: 150 Green Pond Road
Rockaway, New Jersey 07866
U.S.A.

declares that the Product

Product Name: a) Dynamic Measurement DC Source

b) System DC Power Supply

Model Number: a) HP 66311A, 66312A

b) HP 6612B, 6611C, 6612C, 6613C, 6614C

conforms to the following Product Specifications:

Safety: IEC 1010-1:1990+A1(1992) / EN 61010-1:1993

EMC: CISPR 11:1990 / EN 55011:1991 - Group 1 Class B
IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m
IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines
1 kV Power Lines

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

New Jersey November, 1997 ______
Location Date Bruce Krueger / Quality Manager

European Contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH,

Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

v

Acoustic Noise Information

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenläminformationsverordnung vom 18 Januar 1991.
* Schalldruckpegel Lp <70 dB(A)
* Am Arbeitsplatz
* Normaler Betrieb
* Nach EN 27779 (Typprüfung).

Manufacturer's Declaration

This statement is provided to comply with the requirements of the German Sound Emission Directive,
from 18 January 1991.
* Sound Pressure Lp <70 dB(A)
* At Operator Position
* Normal Operation
* According to EN 27779 (Type Test).

Printing History

The edition and current revision of this manual are indicated below. Reprints of this manual containing
minor corrections and updates may have the same printing date. Revised editions are identified by a new
printing date. A revised edition incorporates all new or corrected material since the previous printing
date.

Changes to the manual occurring between revisions are covered by change sheets shipped with the
manual. In some cases, the manual change applies only to specific instruments. Instructions provided on
the change sheet will indicate if a particular change applies only to certain instruments.

This document contains proprietary information protected by copyright. All rights are reserved. No part
of this document may be photocopied, reproduced, or translated into another language without the prior
consent of Hewlett-Packard Company. The information contained in this document is subject to change
without notice.

 Copyright 1998 Hewlett-Packard Company Edition 1 __________May, 1998

vi

Table of Contents

Warranty Information ii
Safety Summary iii
Declaration Page v
Acoustic Noise Information vi
Printing History vi
Table of Contents vii

1 - QUICK REFERENCE 1

HP 66311A Mobile Communication DC Source 1
The Front Panel - At a Glance 2
The Rear Panel - At a Glance 3
Instrument Configuration 3
Front Panel Number Entry 4
Front Panel Annunciators 5
Immediate Action Keys 5
Front Panel Menus - At a Glance 6
SCPI Programming Commands - At a Glance 7

2 - GENERAL INFORMATION 9

Document Orientation 9
Safety Considerations 10
Options and Accessories 10
Description 11

Capabilities 11
Front Panel Controls 11
Remote Programming 12
Output Characteristic 12

3 - INSTALLATION 15

Installation and Operating Checklist 15
Inspection 16

Damage 16
Packaging Material 16
Items Supplied 16
Cleaning 16

Location 17

Bench Operation 17
Rack Mounting 17

Input Connections 18

Connect the Power Cord 18

Output Connections 18

Current Ratings 18
Voltage Drops and Lead Resistance 19

Remote Sensing 19

Remote Sense Leads 20
Maintaining Stability while Remote Sensing 22
Output Compensation (High Mode/Low Mode) 22

Local Sensing 23
OVP Considerations 24
External Protection Connections 24
Digital I/O Connections 25

vii

Controller Connections 26

HP-IB Interface 26
RS-232 Interface 26

4 - TURN-ON CHECKOUT 29

Checkout Procedure 29
In Case of Trouble 31

Error Messages 31
Line Fuse 31

5 - FRONT PANEL OPERATION 33

Introduction 33
Front Panel Description 33
System Keys 35
Function Keys 36

Immediate Action Keys 36
Scrolling Keys 36
Metering Keys 37
Output Control Keys 38

Entry Keys 39
Examples of Front Panel Programming 40

1 - Setting the Output Voltage, Current, and Compensation 40
2 - Querying and Clearing Output Protection and Errors 41
3 – Making Front Panel Measurements 42
4 - Programming External Protection and the Digital Port Functions 44
5 - Setting the HP-IB Address and RS-232 Parameters 44
6 - Saving and Recalling Operating States 45

6 - INTRODUCTION TO PROGRAMMING 47

HP-IB Capabilities of the DC Source 47

HP-IB Address 47

RS-232 Capabilities of the DC Source 47

RS-232 Data Format 47
Baud Rate 47
RS-232 Flow Control 48

Introduction to SCPI 48

SCPI References 48
HP-IB References 48
Conventions Used in This Guide 49

Types of SCPI Commands 49

Multiple Commands in a Message 50
Moving Among Subsystems 50
Including Common Commands 51
Using Queries 51

Types of SCPI Messages 51

The Message Unit 52
Headers 52
Query Indicator 52
Message Unit Separator 52
Root Specifier 52
Message Terminator 52

SCPI Data Formats 53

Numerical Data Formats 53
Suffixes and Multipliers 53

viii

Response Data Types 53

SCPI Command Completion 54
Using Device Clear 54
RS-232 Troubleshooting 55
SCPI Conformance Information 55

SCPI Confirmed Commands 55
Non-SCPI Commands 55

7 - PROGRAMMING THE DC SOURCE 57

Introduction 57
Programming the Output 57

Power-on Initialization 57
Enabling the Output 57
Output Voltage 58
Output Current 58

Triggering Output Changes 59

SCPI Triggering Nomenclature 59
Output Trigger System Model 59
Setting the Voltage or Current Trigger Levels 59
Initiating the Output Trigger System 60
Generating Triggers 60

Making Measurements 61

Controlling Measurement Samples 61
Current Ranges and Measurement Detector 62
Window Functions 62
Voltage and Current Measurements 63
Pulse Measurements 63

Internally Triggered Measurements 65

SCPI Triggering Nomenclature 65
Measurement Trigger System Model 65
Initiating the Measurement Trigger System 66
Selecting the Measurement Trigger Source 66
Generating Measurement Triggers 66
Pre-event and Post-event Triggering 68

Programming the Status Registers 69

Power-On Conditions 69
Operation Status Group 71
Questionable Status Group 72
Standard Event Status Group 72
Status Byte Register 72
Determining the Cause of a Service Interrupt 73
Servicing Operation Status and Questionable Status Events 73
Monitoring Both Phases of a Status Transition 74

Inhibit/Fault Indicator 74

Remote Inhibit (RI) 74
Discrete Fault Indicator (DFI) 75
Using the Inhibit/Fault Port as a Digital I/O 75

8 - LANGUAGE DICTIONARY 77

Introduction 77

Subsystem Commands 77
Common Commands 81
Programming Parameters 81

Calibration Commands 82

ix

CALibrate:CURRent 82
CALibrate:CURRent:MEASure:LOWRange 82
CALibrate:CURRent:MEASure:AC 82
CALibrate:CURRent:NEGative 82
CALibrate:DATA 83
CALibrate:LEVel 83
CALibrate:PASSword 83
CALibrate:SAVE 83
CALibrate:STATe 84
CALibrate:VOLTage 84
CALibrate:VOLTage:PROTection 84

Display Commands 85

DISPlay 85
DISPlay:MODE 85
DISPlay:TEXT 85

Measurement Commands 86

MEASure:ARRay:CURRent? FETCh:ARRay:CURRent? 86
MEASure:ARRay:VOLTage? FETCh:ARRay:VOLTage? 86
MEASure:CURRent? FETCh:CURRent? 87
MEASure:CURRent:ACDC? FETCh:CURRent:ACDC? 87
MEASure:CURRent:HIGH? FETCh:CURRent:HIGH? 87
MEASure:CURRent:LOW? FETCh:CURRent:LOW? 88
MEASure:CURRent:MAXimum? FETCh:CURRent: MAXimum? 88
MEASure:CURRent:MINimum? FETCh:CURRent:MINimum? 88
MEASure:VOLTage? FETCh:VOLTage? 89
MEASure:VOLTage:ACDC? FETCh:VOLTage:ACDC? 89
MEASure:VOLTage:HIGH? FETCh:VOLTage:HIGH? 89
MEASure:VOLTage:LOW? FETCh:VOLTage:LOW? 90
MEASure:VOLTage:MAXimum? FETCh:VOLTage:MAXimum? 90
MEASure:VOLTage:MINimum? FETCh:VOLTage:MINimum? 90
SENSe:CURRent:DETector 91
SENSe:CURRent:RANGe 91
SENSe:FUNCtion 92
SENSe:SWEep:OFFSet:POINts 92
SENSe:SWEep:POINts 92
SENSe:SWEep:TINTerval 92
SENSe:WINDow 93

Output Commands 94

OUTPut 94
OUTPut:DFI 94
OUTPut:DFI:SOURce 94
OUTPut:PON:STATe 95
OUTPut:PROTection:CLEar 95
OUTPut:PROTection:DELay 95
OUTPut:RI:MODE 96
OUTPut:TYPE 96
[SOURce:]CURRent 97
[SOURce:]CURRent:PROTection:STATe 97
[SOURce:]CURRent:TRIGger 97
[SOURce:]DIGital:DATA 98
[SOURce:]DIGital:FUNCtion 98
[SOURce:]VOLTage 98
[SOURce:]VOLTage:PROTection 99
[SOURce:]VOLTage:PROTection:STATe 99
[SOURce:]VOLTage:TRIGger 99

x

Status Commands 100

STATus:PRESet 100
STATus:OPERation? 100
STATus:OPERation:CONDition? 100
STATus:OPERation:ENABle 101
STATus:OPERation:NTR STATus:OPERation:PTR 101
STATus:QUEStionable? 102
STATus:QUEStionable:CONDition? 102
STATus:QUEStionable:ENABle 102
STATus:QUEStionable:NTR STATus:QUEStionable:PTR 103

System Commands 104

SYSTem:ERRor? 104
SYSTem:LANGuage 104
SYSTem:VERSion? 104
SYSTem:LOCal 105
SYSTem:REMote 105
SYSTem:RWLock 105

Trigger Commands 106

ABORt 106
INITiate:SEQuence INITiate:NAME 106
INITiate:CONTinuous:SEQuence1 INITiate:CONTinuous:NAME TRANsient 106
TRIGger 107
TRIGger:SOURce 107
TRIGger:SEQuence2 TRIGger:ACQuire 107
TRIGger:SEQuence2:COUNt:CURRent TRIGger:ACQuire:COUNt:CURRent 108
TRIGger:SEQuence2:COUNt:VOLTage TRIGger:ACQuire:COUNt:VOLTage 108
TRIGger:SEQuence2:HYSTeresis:CURRent TRIGger:ACQuire:HYSTeresis:CURRent 109
TRIGger:SEQuence2:HYSTeresis:VOLTage TRIGger:ACQuire:HYSTeresis:VOLTage 109
TRIGger:SEQuence2:LEVel:CURRent TRIGger:ACQuire:LEVel:CURRent 110
TRIGger:SEQuence2:LEVel:VOLTage TRIGger:ACQuire:LEVel:VOLTage 110
TRIGger:SEQuence2:SLOPe:CURRent TRIGger:ACQuire:SLOPe:CURRent 111
TRIGger:SEQuence2:SLOPe:VOLTage TRIGger:ACQuire:SLOPe:VOLTage 111
TRIGger:SEQuence2:SOURce TRIGger:ACQuire:SOURce 112
TRIGger:SEQuence1:DEFine TRIGger:SEQuence2:DEFine 112

Common Commands 113

*CLS 113
*ESE 113
*ESR? 114
*IDN? 114
*OPC 114
*OPT? 115
*PSC 115
*RCL 115
*RST 116
*SAV 116
*SRE 117
*STB? 117
*TRG 118
*TST? 118
*WAI 118

A - SPECIFICATIONS 119

Specifications 119
Supplemental Characteristics 120

xi

B - VERIFICATION AND CALIBRATION 123

Introduction 123

Equipment Required 123
Test Setup 123

Performing the Verification Tests 124

Turn-On Checkout 125
Voltage Programming and Measurement Accuracy 125
Current Programming and Measurement Accuracy 125

Performing the Calibration Procedure 127

Front Panel Calibration Menu 128
Front Panel Calibration 128

Calibration Error Messages 131
Changing the Calibration Password 131
Calibration Over the HP-IB 131

C - ERROR MESSAGES 133

Error Number List 133

D - EXAMPLE PROGRAMS 137

Introduction 137

Assigning the HP-IB Address in Programs 137
National Instruments GP-IB Driver 137
HP BASIC 140
Pulse Measurements 141
DFI Programming Example 145

E - LINE VOLTAGE CONVERSION 147

Open the Unit 147
Configure the Power Transformer 147
Install the Correct Line Fuse 148
Close the Unit 148

F - COMPATIBILITY LANGUAGE 149

Introduction 149

INDEX 155

xii

1

Quick Reference

HP 66311A Mobile Communication DC Source

The HP 66311A is a 45 Watt, high performance dc power source that provides dynamic measurement
and analysis of voltage and current waveforms. It is designed to simplify the testing of digital wireless
communications products. For example, data acquired using its dynamic measurement capability can be
used in determining the battery operating time. The 15 volt source and 5A peak current capability
provides compatibility with a number of communications standards, inclunding: GSM, CDMA, TDMA,
PCS, DECT, TERA, PHS, NADC, PHS, and others.

The combination of bench-top and system features in this dc source provide versatile solutions for your
design and test requirements. Key features are summarized as follows:

Convenient bench-top features

♦ Up to 45 Watts output power

♦ Excellent transient voltage response characteristics

♦ Source and measurement capability of 5 amperes for up to 7 milliseconds

♦ Easy to use knob for voltage and current settings

♦ Highly visible vacuum-fluorescent front panel display

♦ Low power supply output noise of less than 6 mV peak-to-peak

♦ Current measurement resolution better than 1 microampere in the low range

♦ Current sinking up to 2.8 amperes

♦ Save and recall up to 4 instrument operating states

♦ I/O setup easily done from the front panel

Flexible system features

♦ HP-IB (IEEE-488) and RS-232 interfaces are standard

♦ SCPI (Standard Commands for Programmable Instruments) compatibility

♦ Output programming response times of less than 200 microseconds

♦ Dynamic current pulse measurement with pre- and post-trigger buffer capability

1

1 - Quick Reference

The Front Panel - At a Glance

1 A 14-character

display shows output
measurements and
programmed values.

1

CV CC

SYSTEM FUNCTION

LINE

Local

1

Off

On

2 Annunciators

indicate operating
modes and status
conditions.

2

66311A 0-15V/0-3A
Mobile Communications DC Source

Unr Dis OCP

Error

Address

2

Save

Recall

6

Input

Meter

3

Protect

7

3 Rotary control sets

voltage, current, and
menu parameters.

ÃÃÃÃ

Use and
to set the resolution;
then adjust the value
with the knob.

Cal

Rmt Addr Err SRQ

Shift

Prot

OV

45

890

Voltage

Current

Output

.

CalOCPProt Cir

Output

On/Off

4 Front panel output

connectors.

ÄÄÄÄ

3

ENTRY

C

r

i

E

n

t

r

y

Enter

-

Number

Enter

e

c

a

p

s

k

c

a

B

OUTPUT

+_

50 VDC

Max

4

+

-

5

5 Turns the dc source

on and off.

6

6 System keys:

♦ return to Local

mode

♦ set the HP-IB

address

♦ set the RS-232

interface

♦ display SCPI

error codes

♦ save and recall

instrument states

♦ select

programming
language.

7

7 Function keys:

♦ enable/disable

the output

♦ select metering

functions

♦ program voltage

and current

♦ set and clear

protection
functions

cccc

♦ and

dddd

dddd

scroll through the
front panel menu
commands.

cccc

8

8 Entry keys:

♦ enter values
♦ increment or decrement

values

ÅÅÅÅ

♦ and

ÆÆÆÆ

ÆÆÆÆ

select front panel menu
parameters.

ÃÃÃÃ

ÃÃÃÃ

♦ and

select a digit in the
numeric entry field.

ÅÅÅÅ

ÄÄÄÄ

ÄÄÄÄ

2

The Rear Panel - At a Glance

Quick Reference - 1

1 AC calibration switch

(see appendix B).

1

WARNING:

WARNING:

2 HP-IB (IEEE-488)

interface connector.

3 RS-232 interface

connector.

2 3 4

NO OPERATOR SERVICEABLE PARTS INSIDE, REFER SERVICING TO SERVICE TRAINED PERSONNEL.

RS 232

LINE

FUSE

AC - I CAL

| Normal

/ Hold to Cal

-S

-+

+S

+

50VDC MAX TO

-

FOR CONTINUED FIRE PROTECTION, USE SPECIFIED LINE FUSE

SENSE

Local

Remote

1A

120V

250V

RATING

000VA

50/60 Hz

FUSE

4 INH/FLT (remote

INHibit / internal
FauLT) connector.
Connector plug is
removable.

INH FLT

+

-+

5 Output and Remote

sense connector.

5 6

6 Remote or Local

sense switch

7 8

7 Fuse holder 8 Power cord connector

(IEC 320)
Connector plug is
removable.

Instrument Configuration

Use the front panel Address key to configure the interface

Refer to “Front Panel Menus - At a Glance”

♦ Select either the HP-IB or RS-232 interface.

♦ Enter the HP-IB bus address.

♦ Configure the RS-232 baud rate, parity, and flow control.

♦ Select either the SCPI or COMPatibility programming language.

♦ Enable the optional HP 14575A remote front panel.

3

1 - Quick Reference

Front Panel Number Entry

Enter numbers from the front panel using one the following methods:

Use the arrow keys and knob to change voltage or current settings

NOTE: The output must be ON to see the displayed values change in Meter mode. With the

output enabled, this method changes the output voltage or current immediately.

Use the Function keys and knob to change the displayed settings

Use the arrow keys to edit individual digits in the displayed setting

Increments the flashing digit

Decrements the flashing digit

Moves the flashing digit to the right

Moves the flashing digit to the left

Enters the value when editing is complete

Use the Function keys and Entry keys to enter a new value

NOTE: If you make a mistake, use the Backspace key to delete the number, or press the Meter

key to return to meter mode.

4

Front Panel Annunciators

Quick Reference - 1

CV

CC

Unr

Dis

OCP

Prot

Cal

Shift

Rmt

Addr

Err

The output is operating in constant voltage mode.

The output is operating in constant current mode.

The output is unregulated.

The output is OFF. Press the Output On/Off key to turn the output on.

The over-current protection state is ON. Press the OCP key to turn over-current
protection off.

Indicates that the output has been disabled by one of the protection features.
Press the Prot Clear key to clear the protection condition.

Calibration mode is ON. Scroll to the Cal Off command and press the Enter key
to exit the calibration mode.

The Shift key has been pressed.

The selected Remote programming interface (either HP-IB or RS-232) is active.
Press the Local key to return the unit to front panel control.

The interface is addressed to talk or listen.

There is an error in the SCPI error queue. Press the Error key to view the error
code.

SRQ

The interface is requesting service.

Immediate Action Keys

Output

A toggle switch that turns the output of the dc source on or off.

On/Off

Activates front panel control when the unit is in remote mode (unless a Lockout

Local

command is in effect).

Resets the protection circuit and allows the unit to return to its last programmed

Shift

A toggle switch that enables or disables overcurrent protection.

Prot Clr Shift

state.

OCP

5

1 - Quick Reference

Front Panel Menus - At a Glance

Address

Recall

Meter

Voltage

Current

Protect

Output

Shift Input

dddd

dddd

dddd

dddd

dddd

dddd

Save Shift
Error Shift

dddd
dddd
dddd
dddd
dddd
dddd
dddd
dddd
dddd
dddd

dddd
dddd
dddd
dddd
dddd
dddd
dddd
dddd

OV Shift

dddd

dddd

dddd

dddd

Cal Shift

ADDRESS 7

INTF HPIB

BAUDRATE 300

PARITY NONE

FLOW NONE

LANG SCPI

REMOTE FP OFF

*RCL 0

*SAV 0

ERROR 0

12.000V 0.204A

12.500V MAX

1.000V MIN

12.330V HIGH

0.080V LOW

12.000V RMS

0.350A MAX

0.050A MIN

0.400A HIGH

0.012A LOW

0.210A RMS

VOLT 20.000

CURR 2.000

OC -- -- -- --

*RST
PON:STATE RST
PROT:DLY 0.08
RI LATCHING
DFI OFF
DFI:SOUR OFF
PORT RIDFI
DIGIO 7

TYPE:CAP LOW

VOLT:PROT 22

PROT:STAT ON

CURR:RANG HIGH

CURR:DET ACDC

TINT 46.8

POINT 2048

CAL ON

Use and to select parameters (table shows factory defaults). Use to exit any menu.

Sets the HP-IB Address

Selects an interface (HPIB or RS232)

Selects baud rate (300, 600, 1200, 2400, 4800, 9600)

Selects message parity (NONE, EVEN, ODD, MARK, SPACE)

Selects flow control (XON-XOFF, RTS-CTS, DTR-DSR, NONE)

Selects language (SCPI or COMP)

Enables or disables HP 14575A front panel interface (ON or OFF)

Recalls instrument state

Saves present instrument state

Displays errors in SCPI error queue

Measures output voltage and current
Measures peak output voltage
Measures minimum output voltage
Measures the high level of a voltage pulse waveform
Measures the low level of a voltage pulse waveform
Measures rms voltage
Measures peak output current
Measures minimum output current
Measures the high level of a current pulse waveform
Measures the low level of a current pulse waveform

Measures rms current

Sets the output voltage

Sets the output current

Protection status (example shows overcurrent tripped)

Places the dc source in the factory-default state
Select the power-on state command (RST or RCL0)
Sets the output protection delay in seconds
Sets the remote inhibit mode (LATCHING, LIVE, or OFF)
Sets the discrete fault indicator state (ON or OFF)
Selects the DFI source (QUES, OPER, ESB, RQS, or OFF)
Sets the output port functions (RIDFI or DIGIO)
Sets and reads the I/O port value (0 through 7)

Sets the output capacitance compensation (HIGH or LOW)

Sets the overvoltage protection level

Enables or disables overvoltage protection (ON or OFF)

Sets the current range (HIGH, LOW, or AUTO)

Sets the current measurement detector (ACDC or DC)

Sets the time interval for a front panel measurement in seconds

Sets the buffer size for a front panel measurement

Accesses calibration menu (See Appendix B).

MeterÅÅÅÅ ÆÆÆÆ

6

Quick Reference - 1

SCPI Programming Commands - At a Glance

NOTE: Some [optional] commands have been included for clarity. Refer to chapter 8 for a

complete description of all programming commands.

SENSe
ABORt
CALibrate

:CURRent [:POSitive] :FUNCtion “VOLT” | “CURR”
:NEGative :SWEep :OFFSet :POINts <n>
:MEASure :LOWRange :POINts <n>
:AC :TINTerval <n>
:DATA <n> [SOURce:] CURRent <n>
:LEVel P1 | P2 | P3 | P4 :TRIGgered <n>
:PASSword <n> :PROTection :STATe <bool>
:SAVE DIGital :DATA <n>
:STATe <bool> [, <n>] :FUNCtion RIDF | DIG
:VOLTage [:DC] VOLTage <n>
:PROTection :TRIGgered <n>

DISPlay

<bool> :STATe <bool>
:MODE NORMal | TEXT
:TEXT <display_string> :PRESet

INITiate

:SEQuence[1|2] :CONDition?
:NAME TRANsient | ACQuire :ENABle <n>
:CONTinuous :SEQuence[1], <bool> :NTRansition <n>
:NAME TRANsient, <bool> :PTRansition <n>

MEASure | FETCh

:ARRay :CURRent? :CONDition?
:VOLTage? :ENABle <n>
[:CURRent] [:DC]? :NTRansition <n>
:ACDC? :PTRansition <n>
:HIGH?
:LOW? :ERRor?
:MAX? :LANGuage SCPI | COMPatibility
:MIN? :VERSion?
:VOLTage [:DC]? :LOCal
:ACDC? :REMote
:HIGH? :RWLock
:LOW?
:MAX? :SEQuence2| :ACQuire [:IMMediate]
:MIN? :COUNt :CURRent <n>

OUTPut

<bool> :HYSTeresis:CURRent <n>
:DFI <bool> :VOLTage <n>
:SOURce QUES | OPER | ESB | RQS | OFF :LEVel :CURRent <n>
:PON :STATe RST | RCL0 :VOLTage <n>
:PROTection :CLEar :SLOPe :CURRent POS | NEG | EITH
:DELay <n> :VOLTage POS | NEG | EITH
:RI :MODE LATCHing | LIVE | OFF :SOURce BUS | INTernal
:TYPE [:CAPacitance] HIGH | LOW [:SEQuence1| :TRANsient][:IMMediate]
:SOURce BUS
:SEQuence1 :DEFine TRANsient
:SEQuence2 :DEFine ACQuire

2

:QUEStionable [:EVENt]?

:CURRent :RANGe <n>
:DETector ACDC | DC

:PROTection <n>

STATus

:OPERation [:EVENt]?

SYSTem

TRIGger

:VOLTage <n>

1

7

2

General Information

Document Orientation

This manual describes the operation of the HP Model 66311A Mobile Communications DC Source.
Unless otherwise noted, this model will be referred to by the description "dc source" throughout this
manual.

The following Getting Started Map will help you find the information you need to complete the specific
task that you want to accomplish. Refer to the table of contents or index of each guide for a complete list
of the information contained within.

Getting Started Map

Task Where to find information

Quick Reference Section
Installing the unit

Line voltage connections
Computer connections
Load connections
Checking out the unit
Verifying proper operation
Using the front panel
Calibrating the unit
Using the front panel
Front panel keys
Front panel examples
Using the programming interface
HP-IB interface
RS-232 interface

Programming the unit using SCPI (and
COMPatibility) commands

SCPI commands
SCPI programming examples
SCPI language dictionary

Programming the unit using the HP VXIplug&play
instrument driver

Installing the instrument driver
Instrument driver functions
C/C++ example programs
Visual BASIC example programs
LabVIEW example programs
HP VEE example programs

Chapter 1
Chapter 2

Chapter 3

Chapter 5

Chapter 6

Chapters 7 and 8 for SCPI commands.
Appendix D for SCPI examples
Appendix F for COMPatibility commands

HP VXIplug&play installation sheet and
on-line help

NOTE:

The driver must be installed on your pc to
access the on-line information.
Drivers for HP-UX are available on the
web at www.hp.com/go/power

9

2 - General Information

Safety Considerations

This dc source is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with a ground receptacle.
Refer to the Safety Summary page at the beginning of this guide for general safety information. Before
installation or operation, check the dc source and review this guide for safety warnings and instructions.
Safety warnings for specific procedures are located at appropriate places in the guide.

Options and Accessories

Table 2-1. Options

Option Description

100

220

230

1CM1 Rack mount kit for one unit (HP p/n 5062-3972)
AXS1 Rack mount kit for two side-by-side units of equal depth. Consists of:

8ZJ Delete instrument feet option
J01 Output Compensation set to High Mode

1

Support rails are required when rack mounting units. Use E3663A support rails for HP rack cabinets,

and E3664A for non-HP rack cabinets.

0BN Service manual with extra operating manuals

87−106 Vac, 47−63 Hz

191−233 Vac, 47−63 Hz

207−253 Vac, 47−63 Hz

Lock-link kit (HP p/n 5061-9694) and Flange kit (HP p/n 5062-3974)

Table 2-2. Accessories

Item HP Part Number

HP-IB cables 1.0 meter (3.3 ft) HP 10833A

2.0 meters (6.6 ft) HP 10833B

4.0 meters (13.2 ft) HP 10833C

0.5 meters (1.6 ft) HP 10833D

RS-232 cable 9-pin F to 9-pin F, 2.5 meter, null modem/printer cable
with one 9-pin M to 25-pin F adapter

RS-232 adapter kit - contains the following 4 adapters
9-pin M to 25-pin M for pc or printer
9-pin M to 25-pin M for pc or printer
9-pin M to 25-pin M for modem
9-pin M to 9-pin M for modem

Rack mount with slide - for two side-by-side units of different depths 5062-3996; 1494-0015

Rack mount - for two side by side units of different depths 5062-3996

Rack mount with slide - for one unit 5062-3996; 1494-0015;

Remote front panel - for viewing up to 6 remote HP 66311A units
Includes an ac/dc adapter for powering up to 3 remote panels

HP 34398A

HP 34399A

5062-4022

HP 14575A

10

General Information - 2

Description

The HP 66311A Mobile Communications DC Source provides a stable, programmable dc source for
testing digital wireless communications products. It integrates a highly accurate voltage and current
meter with the capability to measure currents in the microampere range. The HP 66311A also has the
ability to measure and characterize output voltage and current waveforms.

The HP 66311A can source and measure currents up to 5 amperes for up to 7 milliseconds. Note that the
average current cannot exceed 3.0712 amps. If the unit attempts to draw current for longer than seven
milliseconds, the current limit amplifier will limit the current to 3.0712 amps.

NOTE: To source up to 5 amperes of current for up to 7 milliseconds, the current limit must

be programmed for greater than 3 amperes (up to a maximum of 3.0712 A).

Capabilities

♦ Output Voltage and Current control with 12-bit programming resolution.

Current source capability up to 5 amperes for 7 milliseconds

♦ Extensive measurement capability:

dc voltage and current.
rms and peak voltage and current.
Current measurement capability up to approximately 7.0 amperes
16-bit measurement resolution (low range is accurate to less than 1 microampere).
Triggered acquisition of digitized current and voltage waveforms

♦ Front panel control with 14-character vacuum fluorescent display, keypad, and rotary control for

voltage and current settings.

♦ Built-in HP-IB and RS-232 interface programming with SCPI command language.

♦ Non-volatile state storage and recall with SCPI command language.

♦ Over-voltage, over-current, over-temperature, and RI/DFI protection features.

♦ Extensive selftest, status reporting, and software calibration.

Front Panel Controls

The front panel has both rotary (RPG) and keypad controls for setting the output voltage and current. The
panel display provides digital readouts of a number of output measurements. Annunciators display the
operating status of the dc source. System keys let you perform system functions such as setting the HP-IB
address and recalling operating states. Front panel Function keys access the dc source function menus.
Front panel Entry keys let you select and enter parameter values.

Refer to chapter 5 for a complete description of the front panel controls.

11

2 - General Information

Remote Programming

NOTE: When shipped, all units are set to the SCPI programming language. The language setting

is saved in non-volatile memory.
To change the programming language from SCPI to COMPatibility language, press the
front panel
COMP, then press

Address key, use d

d to scroll to the LANG command, press Æ

dd

Enter. Refer to the chapters 6 through 8 for further information about

Æ to select

ÆÆ

remote programming.

The dc source may be remotely programmed via the HP-IB bus and/or from an RS-232 serial port. HP-IB
programming is with SCPI commands (Standard Commands for Programmable Instruments), which make
the dc source programs compatible with those of other HP-IB instruments. Dc source status registers
allow remote monitoring of a wide variety of dc source operating conditions. A Compatibility language
mode is also included to make the dc source compatible with the HP 6632A, 6633A, and 6634A Series
dc power supplies (refer to appendix E). Note that the compatibility features of this unit are limited to the
features that were originally available on HP 6632A, 6633A, and 6634A units.

Output Characteristic

The dc source's output characteristic is shown in the following figure. The output of the dc source may be
adjusted to any value within the boundaries shown.

-2.8A

VSET

-1.2A

Output

Voltage

0

15V

C

ISET

1

e

n

i

l

d

a

o

l

e

v

i

t

s

i

s

e

r

V

s

e

r

C

C

a

o

l

e

v

i

t

s

i

2

e

n

i

l

d

Peak Current

capability for up

to 7 ms shown
by dotted lines

3A

5A

+-

Output
Current

Figure 2-1. Dc Source Output Characteristic

12

General Information - 2

The dc source is capable of providing a constant dc output of 15 volts with up to 3 amperes of current. It
is capable of sourcing peak currents of up to 5 amperes -- provided the peak current pulse does not
exceed 7 milliseconds, and the average current requirement does not exceed 3 amperes. The peak current
capability is illustrated by the dotted line in Figure 2-1.

The dc source can operate in either constant voltage (CV) or constant current (CC) over the rated output
voltage and current. Figure 2-1 shows a single range − two quadrant capability. This means that the dc
source is capable of sourcing as well as sinking current over the output voltage range from zero volts to
the rated voltage. This negative current sinking capability provides fast downprogramming of the output
of the dc source. The negative current is not programmable, and varies linearly from 1.2 amperes at the
full rated voltage, to 2.8 amperes at zero output voltage.

The operating point of the unit is determined by the voltage setting, current setting, and the load
resistance. In figure 2-1, operating point 1 is defined by the load line traversing the positive operating
quadrant in the constant voltage region. Operating point 2 is defined by the load line traversing the
positive operating quadrant in the constant current region.

NOTE: If you attempt to operate the dc source beyond its output ratings, the output of the unit

may become unregulated. This is indicated by the UNR annunciator on the front panel.
The output may also become unregulated if the ac line voltage drops below the minimum
rating specified in Appendix A.

Appendix A documents the dc source's specifications and supplemental characteristics.

13

3

Installation

Installation and Operating Checklist

Check the Output Compensation

 As shipped from the factory, the output compensation of the dc source is set to Low Mode. This lets
the unit operate with phones having input capacitances from 0 to 12000 µF.
For improved transient response in your test system, you may want to set the output compensation to
High Mode (for phones having input capacitances from 5 to 12000 µF). Refer to “Output Compensation”
in this chapter.

Check the Sense and Load Connections

 If you are remote sensing, is the sense switch on the back of the dc source in the Remote
position? Remote sensing is recommended for most applications. Push the switch out for remote sensing.

Refer to “Remote Sensing” in this chapter.

 If you are remote sensing, are the + and −−−− sense leads connected ONLY at the test fixture and
within 20 inches of the phone contacts? For best performance, the distance from sense lead termination

to the phone contacts should be as short as possible. Refer to “Lead Resistance” in this chapter.

 If you are using the front panel terminals, are the load leads twisted and less than 18 inches in
length? When using the front panel terminals and not remote sensing, you must set the sense switch on

the back of the unit to the Local position. Refer to “Lead Resistance” and “Local Sensing” in this
chapter.

Check the Operating Settings and Conditions

 Are you able to communicate remotely with the dc source? If not, check that the address setting
and the programming language are set correctly. Refer to “HP-IB address” and “Language setting” in
chapter 5.

 Is the Prot or Err annunciator on the front panel on? If yes, clear the fault condition before
continuing. Refer to “Clearing Protection” in chapter 5.

 Is the Overvoltage circuit shutting the unit down? If yes, you can disable the overvoltage circuit.
Refer to “Clearing Protection” in chapter 5.

 Are you measuring dynamic output currents? If yes, check that the current detector is set to
ACDC. Refer to “Front Panel Measurements” in chapter 5.

 Are you measuring output currents under 20 mA? If yes, check that the current range is set to
LOW. Refer to “Front Panel Measurements” in chapter 5.

 Are the front panel readings unstable? If yes, check that the front panel sampling rate is correct.
Also check the setting of the output compensation. Refer to “Front Panel Measurements” in chapter 5
and “Output Compensation” in this chapter.

15

3 - Installation

Inspection

Damage

When you receive your dc source, inspect it for any obvious damage that may have occurred during
shipment. If there is damage, notify the shipping carrier and the nearest HP Sales and Support Office
immediately. The list of HP Sales and Support Offices is at the back of this guide. Warranty information
is printed in the front of this guide.

Packaging Material

Until you have checked out the dc source, save the shipping carton and packing materials in case the unit
has to be returned. If you return the dc source for service, attach a tag identifying the model number and
the owner. Also include a brief description of the problem.

Items Supplied

The following user-replaceable items are included with your dc source. Some of these items are installed
in the unit.

Table 3-1. Items Supplied

Item Part Number Description

Power Cord contact the nearest HP

Sales and Support

Office

Digital connector 1252-1488 4-terminal digital plug that connects to the back of the

Output connector 0360-2604 5-terminal plug that connects to the back of the unit.

Line Fuse 2110-0303

2110-0007

Feet 5041-8801 feet for bench mounting

User's Guide 5962-8272 Contains installation, checkout, and front panel

A power cord appropriate for your location.

unit.

2 A slow-blow for 100/120 Vac operation
1 A slow-blow for 220/230 Vac operation

information.

Cleaning

Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to
clean internally.

WARNING: To prevent electric shock, unplug the unit before cleaning.

16

Installation - 3

Location

The outline diagram in figure 3-1 gives the dimensions of your dc source. The dc source must be installed
in a location that allows sufficient space at the sides and back of the unit for adequate air circulation (see
Bench Operation).

Bench Operation

Do not block the fan exhaust at the rear of the unit.

A fan cools the dc source by drawing air in through the sides and exhausting it out the back. Minimum
clearances for bench operation are 1 inch (25 mm) along the sides.

Rack Mounting

The dc source can be mounted in a standard 19-inch rack panel or cabinet. Table 2-1 documents the HP
part numbers for the various rack mounting options that are available for the dc source. Installation
instructions are included with each rack mount option.

NOTE: Support rails or an instrument shelf is required when rack mounting units.

Figure 3-1. Outline Diagram

17

3 - Installation

Input Connections

Connect the Power Cord

1. Unscrew the line fuse cap from the rear panel and verify that the fuse rating matches what is

specified on the FUSES label on the rear panel. Reinstall the fuse. (See table 3-1 for fuse part
numbers.)

2. Connect the power cord to the IEC 320 connector on the rear of the unit. If the wrong power cord

was shipped with your unit, contact your nearest HP Sales and Support Office (refer to the list at the
back of this guide) to obtain the correct cord.

Output Connections

Turn the unit off before connecting any wires.

The output connector has a termination for the + and − output, the + and − sense terminals, and an earth
ground terminal. The 5-pin connector is removable and accepts wires sizes from AWG 22 to AWG 12.
Disconnect the mating plug from the unit by pulling it straight back.

Front panel binding posts are provided as a convenience for bench operation. The front panel binding
posts are paralleled with the rear panel + and − connections. Load wires that are connected to the front
panel binding posts should be twisted and less than 18 inches in length. Before using the front panel
binding posts, make sure that the sense switch on the back of the unit is set to Local.

NOTE: The front panel binding posts do not meet the noise, regulation, and transient response

specifications documented in Appendix A. The specifications documented in Appendix
A apply only when measured at the rear terminal connections.

Current Ratings

Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat when

carrying the maximum short-circuit current of the dc source.

The following table lists the characteristics of AWG (American Wire Gage) copper wire.

Table 3-2. Ampacity and Resistance of Stranded Copper Conductors

AWG No. Maximum Ampacity (in

free air)

24 3.52 0.0843 0.0257
22 5.0 0.0531 0.0162
20 8.33 0.0331 0.0101
18 15.4 0.0210 0.00639
16 19.4 0.0132 0.00402
14 31.2 0.0083 0.00252
12 40 0.0052 0.00159

Resistance (at 20 deg. C)

Ω

ΩΩΩΩ/m

Ω/ft

ΩΩ

18

Installation - 3

Voltage Drops and Lead Resistance

To optimize the performance and transient response in your test system, please observe the following
guidelines:

♦ Twist the load leads together and keep them as short as possible. The shorter the leads, the better the

performance.

♦ When remote sensing, twist the sense leads together but do not bundle them in with the load leads.

♦ Keep the total cable length to 18 inches or less when local sensing.

♦ Keep the total cable length to the load to 20 ft or less when remote sensing. (Note that the unit has

been tested with cable lengths of up to 40 feet.)

The load wires must also be of a diameter large enough to avoid excessive voltage drops due to the
impedance of the wires. In general, if the wires are heavy enough to carry the maximum short circuit
current without overheating, excessive voltage drops will not be a problem.

The maximum allowable value of load lead resistance is 4 ohms total (2 ohms per side). This may be
further limited to a lower value, based on peak current loading, by the maximum allowable dc voltage
drop of 8 volts total (4 volts per side) as specified for remote sense operation. To illustrate, for up to 2
amps peak, the maximum allowable resistance is 4 ohms total, resulting in a maximum voltage drop of up
to 8 volts. For 4 amps peak the maximum allowable resistance is 2 ohms total, again resulting in a
maximum allowable voltage drop of up to 8 volts.

In addition to keeping dc resistance low, you also need to minimize the total impedance. For higher slew
rate currents (0.2 to 0.3 amps/µs) and long wiring lengths (10 to 20 ft.) the inductance can have as much
effect as the resistance. To minimize inductance, twist the load leads. The inductance will be on the order
of 0.15 µH/ft if twisted, and 0.4 µH/ft if untwisted. In addition to lowering the inductance, twisting the
leads will reduce noise pick up. If you are using remote sense leads, connect these as a second twisted
pair. Do not twist or bundle them with the load leads.

NOTE: The use of relays between the dc source and the phone also increases impedance. Low

resistance relays will improve system performance.

Remote Sensing

Turn the unit off before connecting any wires.

With the Remote/Local switch in the Remote position, the dc source regulates the output voltage at the
output terminals on the back of the unit. External sense terminals are available on the back of the unit
that allow the output voltages to be sensed at the load, compensating for impedance losses in the load
wiring.

NOTE: For the majority of phone applications, remote sensing is highly recommended. In manu

cases remote sensing must be used to ensure stability and optimize transient response.

19

3 - Installation

The output connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the mating plug to make
your wiring connections. When the sense wire connections are complete, set the Remote/Local switch on
the back of the unit to Remote (switch is out). Remote sensing is illustrated in figure 3-2.

HP 66311A OUTPUT
CONNECTOR

-S - + +S

TWIST PAIR

SENSE

Local

Remote

TWIST LEADS

SENSE

SWITCH OUT

+

_

WIRE RESISTANCE

LOAD

Figure 3-2. Remote Sense Connections

Remote Sense Leads

Testing has verified stable performance with the sense leads connected up to 20 inches from the phone.
However, for optimum performance, connect the sense leads as close as possible to the phone under test.
To minimize inductance, connect the sense leads as a separate twisted pair.

The sense leads are part of the dc source's feedback path and must be kept at a low resistance (less than
several ohms) to maintain optimal performance. Connect the sense leads carefully so that they do not
become open-circuited. If the sense leads are left unconnected or become open during operation, the dc
source will regulate at the output terminals, resulting in a 3% to 5% increase in output over the
programmed value. Shorting the sense leads forces the dc source to its maximum voltage, which will trip
the overvoltage protection circuit if it is enabled.

Connect the remote sense leads only to the remote sense connections at the output connector and at the
location on the test fixture where you want to sense the output voltage. There must be not be any
continuity from the sense leads to earth ground or from the sense leads to the output leads other than at
the test fixture. To check for continuity, unplug the output connector from the dc source and temporarily
disconnect the sense leads from the phone contacts. Use an ohmmeter and check for continuity between
the sense and load leads and between the sense leads and ground. Poor transient response will result if
continuity exists.

Figure 3-3 shows how to connect remote sense leads and load leads when external disconnect relays are
included in the load path.

20