Giga-tronics 58542 Manual

Giga-tronics Incorporated v4650 Norris Canyon Road, San Ramon, CA 94583
925.328.4650/800.726.4442/925.328.4700 (Fax)vCustomer Service: 800.444.2878/925.328.4702 (Fax)
Publication 21555, Rev. E, September 2002
58542 VXIbus Universal Power Meter
Operation & Maintenance Manual
www.gigatronics.com

WARRANTY
Giga-tronics 58542 is warranted against defective
materials and workmanship for one year from the
shipment date. Giga-tronics will at its option repair
or replace products that are proven defective
during the warranty period. This warranty DOES
NOT cover damage resulting from improper use,
nor workmanship other than Giga-tronics service.
There is no implied warranty of fitness for a
particular purpose, nor is Giga-tronics liable for any
consequential damages. Specification and price
change privileges are reserved by Giga-tronics.
All technical data and specifications in this publication are subject to change without prior notice and do not represent a change without prior
notice and do not represent a commitment on the part of Giga-tronics Incorporated.
© 2002 Giga-tronics Incorporated. All rights reserved. Printed in the USA.

DECLARATION OF CONFORMITY

Publication 21555, Rev. E, September 2002 i
Contents
About this Publication .................................................................................................................................ix
Conventions ................................................................................................................................................xi
Record of Publication Changes ..................................................................................................................xiii
Special Configurations ................................................................................................................................xv
1
Introduction
1.1 Description ...............................................................................................................................1-1
1.1.1 Items Furnished ................................................................................................. 1-2
1.1.2 Items Required ................................................................................................... 1-2
1.1.3 Tools & Test Equipment ...................................................................................... 1-2
1.1.4 Storage ............................................................................................................... 1-2
1.1.5 Cooling ............................................................................................................... 1-2
1.1.6 Receiving Inspection .......................................................................................... 1-2
1.1.7 Safety Precautions ............................................................................................. 1-3
1.1.8 Reshipment Preparation .................................................................................... 1-3
1.2 Specifications...........................................................................................................................1-4
1.2.1 Range ................................................................................................................. 1-4
1.2.2 Accuracy ............................................................................................................ 1-4
1.2.3 Zeroing Accuracy (Standard CW Sensors) ........................................................ 1-5
1.2.4 Meter Functions ................................................................................................. 1-7
1.2.5 Measurement Speed .......................................................................................... 1-7
1.2.6 Inputs/Outputs .................................................................................................... 1-8
1.2.7 Power Requirements .......................................................................................... 1-8
1.2.8 General Specifications ....................................................................................... 1-9
2
Operation
2.1 Preparation for Use...................................................................................................................2-1
2.2 Installation................................................................................................................................2-1
2.3 Initial Setup..............................................................................................................................2-2
2.3.1 Logical Address .................................................................................................. 2-2
2.3.2 Data Transfer Bus Arbitration ............................................................................. 2-3
2.4 Sensor Precautions...................................................................................................................2-4
2.5 Operation..................................................................................................................................2-5
2.5.1 SCPI Command Interface .................................................................................. 2-5
2.5.2 Sensor Calibration & Zeroing ............................................................................. 2-5
2.5.3 Sensor & Channel Configuration ........................................................................ 2-6
2.5.4 Measurement Triggering .................................................................................... 2-6
2.5.5 Memory Functions .............................................................................................. 2-6
2.5.6 IEEE 488.2 Required Commands ...................................................................... 2-7

58542 VXIbus Universal Power Meter
ii Publication 21555, Rev. E, September 2002
2.5.7 DIAGnostic Commands ...................................................................................... 2-7
2.5.8 Calculate Subsystem Commands ...................................................................... 2-8
2.5.9 Sense Subsystem Commands ........................................................................... 2-9
2.5.10 Trigger Subsystem Commands .........................................................................2-11
2.5.11 GPIB Command Syntax ................................................................................... 2-12
2.5.11.1 Commands in Brackets............................................................... 2-12
2.5.11.2 Programmer Selective Parameters............................................. 2-12
2.5.11.3 Italics in Syntax Descriptions...................................................... 2-12
2.5.11.4 Query Format.............................................................................. 2-12
2.5.11.5 Linking Command Strings........................................................... 2-12
2.5.11.6 Measurement Data Output Format............................................. 2-12
2.5.12 Sensor Calibration & Zeroing ........................................................................... 2-17
2.5.12.1 Sensor Calibration...................................................................... 2-17
2.5.12.2 Sensor Zero................................................................................ 2-18
2.5.13 Reading Power Measurements ........................................................................ 2-19
2.5.13.1 Special Errors ............................................................................. 2-20
2.5.14 Instrument Triggering ....................................................................................... 2-21
2.5.15 Arming the Triggering Cycle ............................................................................. 2-24
2.5.16 Channel Configuration ..................................................................................... 2-25
2.5.17 Cal Factor Correction ....................................................................................... 2-27
2.5.17.1 VPROPF Configuration................................................................. 2-29
2.5.17.2 Cal Factor Error Control.............................................................. 2-29
2.5.18 High Speed Measurements ..............................................................................2-30
2.5.18.1 Operating Mode Control ............................................................. 2-30
2.5.18.2 Approximate Measuring Speeds................................................. 2-32
2.5.18.3 Triggering Notes ......................................................................... 2-33
2.5.18.4 Measurement Level Notes.......................................................... 2-33
2.5.19 Peak Power Sensor Triggering ........................................................................ 2-34
2.5.20 Averaging ......................................................................................................... 2-36
2.5.21 Relative or Referenced Measurements ............................................................ 2-37
2.5.21.1 Error Control ............................................................................... 2-37
2.5.22 Offsets .............................................................................................................. 2-38
2.5.23 SRQ & Status Monitoring ................................................................................. 2-39
2.5.23.1 Event Status Register................................................................. 2-41
2.5.23.2 Status Byte Register................................................................... 2-42
2.5.24 Min/Max Configuration & Monitoring ................................................................ 2-43
2.5.25 Limit Line Configuration & Monitoring .............................................................. 2-44
2.5.26 Analog Output .................................................................................................. 2-46
2.5.27 Saving & Recalling Configurations ................................................................... 2-49
2.5.28 Halting Operation ............................................................................................. 2-49
2.5.29 Preset Configuration ........................................................................................ 2-50
2.5.30 Identification Commands .................................................................................. 2-52
2.5.31 Calibrator Controls ........................................................................................... 2-53
2.5.32 Sensor EEPROM Commands .......................................................................... 2-53
2.5.33 Self-Test ........................................................................................................... 2-55
2.5.34 Error Messages ................................................................................................ 2-59
3
Theory of Operation
3.1 Introduction ..............................................................................................................................3-1
3.2 Circuit Description ....................................................................................................................3-1
3.3 Analog PC Board (A1) ...............................................................................................................3-2

Preface
Publication 21555, Rev. E, September 2002 iii
3.4 Calibrator Module .....................................................................................................................3-4
3.4.1 50 MHz Oscillator ............................................................................................... 3-5
3.4.2 RF Output ........................................................................................................... 3-5
3.4.3 Oven ................................................................................................................... 3-6
3.4.4 Thermistor Bridge ............................................................................................... 3-6
3.4.5 Track & Hold and DAC ....................................................................................... 3-6
3.4.6 Correction Thermistor Circuit ............................................................................. 3-7
3.4.7 Calibrator NVRAM Control Circuit ...................................................................... 3-7
3.4.8 Sensor NVRAM .................................................................................................. 3-7
3.4.9 Sensor Interrupt ................................................................................................. 3-7
3.4.10 Digital Control Circuit ......................................................................................... 3-7
3.5 Digital PC Board (A2)................................................................................................................3-8
3.6 VXI Processor PC Board (A3) ....................................................................................................3-9
3.6.1 VXI Interface ...................................................................................................... 3-9
3.6.1.1 VXI Gate Array.............................................................................. 3-9
3.6.1.2 Shared Memory .......................................................................... 3-10
3.6.1.3 Shared Memory Decoders.......................................................... 3-10
3.6.1.4 Drivers & Transceivers ............................................................... 3-10
3.6.1.5 Logical Address Switch............................................................... 3-10
3.6.1.6 TTL Triggers & Local Bus........................................................... 3-10
3.6.2 CPU & Memory .................................................................................................3-11
3.6.2.1 Processor.................................................................................... 3-11
3.6.2.2 Real Time Clock/Timer ............................................................... 3-11
3.6.2.3 Interrupt Controller...................................................................... 3-11
3.6.2.4 Bus Error Timer .......................................................................... 3-11
3.6.2.5 Local Address Decoders............................................................. 3-11
3.6.2.6 Drivers & Transceivers ............................................................... 3-11
3.6.2.7 Local Memory............................................................................. 3-11
3.6.2.8 LED Drivers ................................................................................ 3-11
4
Calibration & Testing
4.1 Introduction..............................................................................................................................4-1
4.2 Equipment Required ..................................................................................................................4-1
4.3 Calibration Procedures..............................................................................................................4-2
4.3.1 Calibrator Output Power Reference Level ......................................................... 4-2
4.3.1.1 Equipment Required..................................................................... 4-2
4.3.1.2 Procedure..................................................................................... 4-3
4.3.2 Calibrator Output Power ..................................................................................... 4-5
4.3.3 Calibrator Voltages ............................................................................................. 4-7
4.3.4 Calibrator Frequency Check .............................................................................. 4-7
4.4 Performance Tests....................................................................................................................4-8
4.4.1 GPIB Port Check ................................................................................................ 4-8
4.4.1.1 Equipment Required..................................................................... 4-8
4.4.1.2 Procedure..................................................................................... 4-8
4.4.2 Power Sensor Linearity .................................................................................... 4-10
4.4.2.1 Setup Parameters....................................................................... 4-11
4.4.2.2 Equipment Required................................................................... 4-11
4.4.2.3 Test Procedure........................................................................... 4-12

58542 VXIbus Universal Power Meter
iv Publication 21555, Rev. E, September 2002
5
Maintenance
5.1 Introduction ..............................................................................................................................5-1
5.2 Power Supply Voltage Checks...................................................................................................5-1
5.3 Lithium Battery.........................................................................................................................5-2
5.3.1 Replacement Procedure: D ................................................................................ 5-2
5.4 GPIB Test Functions .................................................................................................................5-4
5.4.1 58542 Channel 2 Troubleshooting ..................................................................... 5-4
5.4.2 Diagnostic Test Commands ............................................................................... 5-5
6
Parts Lists
6.1 Introduction ..............................................................................................................................6-1
6.2 58542 VXIbus Universal Power Meter Parts Lists.....................................................................6-1
58542 VXI POWER METER, REV: E ............................................................................... 6-1
21383-A00 58542, VXI CHASSIS ASSY, REV: H.................................................................... 6-1
21359 PCB ASSY,ANALOG VXI, REV: R ....................................................................... 6-2
21359-A00 PCB ASSY PRE-WAVE, ANALOG VXI, REV: N................................................. 6-14
21356 PCB ASSY,DIGITAL, REV: K1 ............................................................................ 6-25
21356-A00 PCB ASSY, PRE-WAVE, DIGITAL VXI, REV: D................................................. 6-27
21418 PCB ASSY, VXI PROCESSOR, REV: B.............................................................. 6-30
6.3 List of Manufacturers .............................................................................................................6-31
7
Diagrams
7.1 Introduction ..............................................................................................................................7-1
58542 VXI Power Meter, DWG 21406, Rev. 1 (1 of 1)........................................................................ 7-3
Analog PC Assy (A1), DWG 21359, Rev. R (1 of 2) ........................................................................... 7-4
Analog Circuit Schematic (A1), DWG 21360, Rev. A (1 of 6) ............................................................. 7-6
Digital PC Assy, DWG 21356, Rev. K1 (1 of 1)................................................................................. 7-12
Digital Circuit Schematic, DWG 21357, Rev. K1 (1 of 2) .................................................................. 7-13
A
Program Examples
A.1 Introduction ..............................................................................................................................A-1
A.2 Sensor Calibration Examples .....................................................................................................A-1
A.2.1 Sensor Calibration Example 1.............................................................................. A-1
A.2.2 Sensor Calibration Example 2.............................................................................. A-2
A.2.3 Sensor Calibration Example 3.............................................................................. A-4
A.2.4 Sensor Calibration Example 4.............................................................................. A-5
A.2.5 Sensor Calibration Example 5.............................................................................. A-6

Preface
Publication 21555, Rev. E, September 2002 v
A.3 Sensor Zeroing Examples ..........................................................................................................A-7
A.3.1 Sensor Zeroing Example 1 .................................................................................. A-7
A.3.2 Sensor Zeroing Example 2 .................................................................................. A-7
A.3.3 Error Control Examples........................................................................................ A-8
A.4 Reading Power Measurement Examples ..................................................................................A-12
A.4.1 Reading Power Measurements Example 1........................................................ A-12
A.4.2 Reading Power Measurements Example 2........................................................ A-13
A.4.3 Reading Power Measurements Example 3........................................................ A-14
A.4.4 Reading Power Measurements Example 4........................................................ A-15
A.4.5 Reading Power Measurements Example 5........................................................ A-16
A.4.6 Reading Power Measurements Example 6........................................................ A-17
A.4.7 Reading Power Measurements Example 7........................................................ A-18
A.4.8 Reading Power Measurements Example 8........................................................ A-19
A.4.9 Reading Power Measurements Example 9........................................................ A-20
A.5 Instrument Triggering Examples ..............................................................................................A-22
A.5.1 TRIGgering Example 1 ...................................................................................... A-22
A.5.2 TRIGgering Example 2 ...................................................................................... A-22
A.5.3 TRIGgering Example 3 ...................................................................................... A-23
A.5.4 TRIGgering Example 4 ...................................................................................... A-23
A.5.5 TRIGgering Example 5 ...................................................................................... A-24
A.5.6 TRIGgering Example 6 ...................................................................................... A-26
A.6 Channel Configuration Examples .............................................................................................A-28
A.6.1 Single Sensor Power Measurement................................................................... A-28
A.6.2 Ratio Measurement............................................................................................ A-28
A.6.3 Difference Measurement.................................................................................... A-28
A.7 Cal Factor Examples................................................................................................................A-29
A.7.1 Cal Factor Example 1 ........................................................................................ A-29
A.7.2 Cal Factor Example 2 ........................................................................................ A-29
A.7.3 Cal Factor Example 3 ........................................................................................ A-30
A.7.4 Cal Factor Example 4 ........................................................................................ A-31
A.7.5 Cal Factor Example 5 ........................................................................................ A-32
A.8 High Speed Measurement Examples ........................................................................................A-35
A.8.1 High Speed Measurement Example 1 ............................................................... A-35
A.8.2 High Speed Measurement Example 2 ............................................................... A-36
A.8.3 High Speed Measurement Example 3 ............................................................... A-37
A.8.4 High Speed Measurement Example 4 ............................................................... A-38
A.8.5 High Speed Measurement Example 5 ............................................................... A-39
A.8.6 High Speed Measurement Example 6 ............................................................... A-41
A.9 Relative or Referenced Measurement Examples.......................................................................A-43
A.9.1 Relative or Referenced Measurements Example 1............................................ A-43
A.9.2 Relative or Referenced Measurements Example 2............................................ A-44
A.10 SRQ Interrupt Examples..........................................................................................................A-46
A.11 Instrument & Sensor Identification Examples..........................................................................A-48
A.11.1 Instrument Identification..................................................................................... A-48
A.11.2 Sensor Model Identification................................................................................ A-49
A.11.3 Sensor Serial Number Identification................................................................... A-51

58542 VXIbus Universal Power Meter
vi Publication 21555, Rev. E, September 2002
B
Power Sensors
B.1 Introduction ..............................................................................................................................B-1
B.2 Power Sensor Selection ............................................................................................................B-1
B.2.1 Modulation Power Sensors B-2
B.2.2 BAP Mode Limitations........................................................................................ B-5
B.2.3 Peak Power Sensors............................................................................................ B-6
B.2.4 Directional Bridges............................................................................................... B-8
B.3 Power Sensor Calibration........................................................................................................B-10
B.3.1 Equipment Required .......................................................................................... B-10
B.3.2 Procedure .......................................................................................................... B-10
C
Options
C.1 Introduction ..............................................................................................................................C-1
C.2 Option 02: 256K Buffer ............................................................................................................C-1
21335 EXTRA MEMORY, 128K, 8540/02, REV.A.......................................................... C-1
Index
58542 VXIbus Universal Power Meter.................................................................................................Index-1

Preface
Publication 21555, Rev. E, September 2002 vii
Illustrations
Figure 1-1: Instrument Linearity..................................................................................................... 1-6
Figure 2-1: Setting the Logical Address......................................................................................... 2-2
Figure 2-2: Default Bus Arbitration Settings................................................................................... 2-3
Figure 2-3: SCPI Subsystem Model............................................................................................... 2-5
Figure 2-4: CALCulate Subsystem Commands............................................................................. 2-8
Figure 2-5: SENSe Subsystem Command Tree............................................................................ 2-9
Figure 2-6: TRIGger Subsystem Command Tree........................................................................ 2-11
Figure 2-7: TRIGger Subsystem Command Tree........................................................................ 2-21
Figure 2-8: VPROPF Configuration.............................................................................................. 2-29
Figure 2-9: SCPI Status Structure Registers ............................................................................... 2-41
Figure 3-1: VXI Power Meter System Block Diagram .................................................................... 3-1
Figure 3-2: Analog PC Assembly Block Diagram........................................................................... 3-2
Figure 3-3: Calibrator Internal Power Standard Configuration....................................................... 3-4
Figure 3-4: Digital PC Assembly (A2) Block Diagram.................................................................... 3-8
Figure 3-5: VXI Processor (A3) Block Diagram.............................................................................. 3-9
Figure 4-1: Calibrator Reference Level Test Setup........................................................................ 4-2
Figure 4-2: GPIB Port Test Setup.................................................................................................. 4-8
Figure 4-3: Power Sensor Linearity Test Setup........................................................................... 4-11
Figure B-1: 80401A Modulation-Related Uncertainty.....................................................................B-7
Figure B-1: Power Sensor Calibration Setup................................................................................B-12

58542 VXIbus Universal Power Meter
viii Publication 21555, Rev. E, September 2002
Tables
Table 2-1: IEEE Required Command Codes............................................................................... 2-7
Table 2-2: VXI GPIB Command Syntax..................................................................................... 2-13
Table 2-3: Approximate Measurement Speeds ......................................................................... 2-32
Table 2-4: Reset & Power on Default Commands..................................................................... 2-50
Table 2-5: Self-Test Error Indication & Limitations .................................................................... 2-55
Table 2-6: SCPI Standard Error Messages ............................................................................... 2-59
Table 2-7: Device Specific Error Messages............................................................................... 2-60
Table 3-1: VXI Power Meter Circuit Assemblies.......................................................................... 3-1
Table 5-1: Diagnostic Commands................................................................................................ 5-5
Table 6-1: List of Manufacturers................................................................................................ 6-31
Table B-1: Power Sensor Selection Guide ...................................................................................B-2
Table B-2: Power Sensor Cal Factor Uncertainties ......................................................................B-5
Table B-3: Modulation Sensor Specifications ...............................................................................B-6
Table B-4: 8035XA Peak Power Sensor Selection Guide ............................................................B-8
Table B-5: Peak Power Sensor Cal Factor Uncertainties ............................................................B-9
Table B-6: Directional Bridge Selection Guide ...........................................................................B-10

Publication 21555, Rev. E, September 2002 ix
About this Publication
This publication contains the following chapters to describe the operation and maintenance of the
58542 VXIbus Universal Power Meter.
Preface
In addition to a comprehensive Contents and general information about the publication, the Preface
also contains a record of changes made to the publication since its production, and a description of
Special Configurations. If a user-specific produce has been ordered, please refer to page xv for a
description of the special configuration.
Chapters
1- Introduction
Contains a brief introduction to the instrument and its performance parameters.
2 - Operation
Contains a guide to the instrument and its configuration menus.
3 - Theory of Operation
Contains a block diagram level description of the instrument and its circuits for maintenance
and applications.
4 - Calibration & Testing
Contains procedures for inspection, calibration and performance testing.
5 - Maintenance
Contains procedures for maintenance and troubleshooting.
6 - Parts Lists
Contains list of components, parts and their sources.
7 - Diagrams
Contains schematics and component diagrams for circuits.
Appendices
A - Program Examples
Contains examples of programs for controlling the 58542 remotely over the GPIB.
B - Power Sensors
Contains specifications and technical data for the selection and application of power sensors.
C - Options
Contains a description of options available for the 58542.

58542 VXIbus Universal Power Meter
xPublication 21555, Rev. E, September 2002
Index - 58542 VXIbus Universal Power Meter
A subject listing of contents for the 58542.
Changes that occur after production of this publication, and Special Configuration data will be inserted
as loose pages in the publication binder. Please insert and/or replace the indicated pages as detailed in
the Technical Publication Change Instructions included with new and replacement pages.

Publication 21555, Rev. E, September 2002 xi
Conventions
The following conventions are used in this publication. Additional conventions not included here will
be defined at the time of usage.
Warning
The WARNING statement is encased in gray and centered in the
page. This calls attention to a situation, or an operating or
maintenance procedure, or practice, which if not strictly
corrected or observed, could result in injury or death of personnel.
An example is the proximity of high voltage.
Caution
The CAUTION statement is enclosed with single lines and
centered in the page. This calls attention to a situation, or an
operating or maintenance procedure, or practice, which if not
strictly corrected or observed, could result in temporary or
permanent damage to the equipment, or loss of effectiveness.
Notes
NOTE: A NOTE Highlights or amplifies an essential operating or maintenance
procedure, practice, condition or statement.
WARNING
CAUTION
☛

58542 VXIbus Universal Power Meter
xii Publication 21555, Rev. E, September 2002
Symbols
Block diagram symbols frequently used in the publication are illustrated below.

Publication 21555, Rev. E, September 2002 xiii
Record of Publication Changes
This table is provided for convenience to maintain a permanent record of publication change data.
Corrected replacement pages will be issued as TPCI (Technical Publication Change Instructions), and
will be inserted at the front of the binder. Remove the corresponding old pages, insert the new pages
and record the changes here.
TPCI Number TPCI Issue Date Date
Entered Comments

58542 VXIbus Universal Power Meter
xiv Publication 21555, Rev. E, September 2002

Publication 21555, Rev. E, September 2002 xv
Special Configurations
When the accompanying product has been configured for user-specific application(s), supplemental
pages will be inserted at the front of the publication binder. Remove the indicated page(s) and replace it
(them) with the furnished Special Configuration supplemental page(s).

58542 VXIbus Universal Power Meter
xvi Publication 21555, Rev. E, September 2002