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Giga-tronics 58542 User Manual
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Giga-tronics Incorporated
v
4650 Norris Canyon Road, San Ramon, CA 94583
925.328.4650/800.726.4442/925.328.4700
(Fax
)
v
Customer 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
2
Table of Contents
Table of Contents
5
About this Publication
13
Conventions
15
Record of Publication Changes
17
Special Configurations
19
Introduction
21
Description
21
Items Furnished
22
Items Required
22
Tools & Test Equipment
22
Storage
22
Cooling
22
Receiving Inspection
22
Safety Precautions
23
Reshipment Preparation
23
Specifications
24
Range
24
Accuracy
24
Zeroing Accuracy (Standard CW Sensors)
25
Figure 1-1: Instrument Linearity
26
Meter Functions
27
Measurement Speed
27
Inputs/Outputs
28
Power Requirements
28
General Specifications
29
Operation
31
Preparation for Use
31
Installation
31
Initial Setup
32
Logical Address
32
Figure 2-1: Setting the Logical Address
32
Data Transfer Bus Arbitration
33
Figure 2-2: Default Bus Arbitration Settings
33
Sensor Precautions
34
Operation
35
SCPI Command Interface
35
Sensor Calibration & Zeroing
35
Figure 2-3: SCPI Subsystem Model
35
Sensor & Channel Configuration
36
Measurement Triggering
36
Memory Functions
36
IEEE 488.2 Required Commands
37
Diagnostic Commands
37
Table 2-1: IEEE Required Command Codes
37
Calculate Subsystem Commands
38
Figure 2-4: Calculate Subsystem Commands
38
Sense Subsystem Commands
39
Figure 2-5: Sense Subsystem Command Tree
39
Trigger Subsystem Commands
41
Figure 2-6: Trigger Subsystem Command Tree
41
GPIB Command Syntax
42
Commands in Brackets
42
Programmer Selective Parameters
42
Italics in Syntax Descriptions
42
Query Format
42
Linking Command Strings
42
Measurement Data Output Format
42
Table 2-2: VXI GPIB Command Syntax
43
Sensor Calibration & Zeroing
47
Sensor Calibration
47
Sensor Zero
48
Reading Power Measurements
49
Special Errors
50
Instrument Triggering
51
Figure 2-7: Trigger Subsystem Command Tree
51
Arming the Triggering Cycle
54
Channel Configuration
55
Cal Factor Correction
57
Vprop
59
Cal Factor Error Control
59
High Speed Measurements
60
Operating Mode Control
60
Approximate Measuring Speeds
62
Table 2-3: Approximate Measurement Speeds
62
Triggering Notes
63
Measurement Level Notes
63
Peak Power Sensor Triggering
64
Averaging
66
Relative or Referenced Measurements
67
Error Control
67
Offsets
68
SRQ & Status Monitoring
69
Event Status Register
71
Figure 2-9: SCPI Status Structure Registers
71
Status Byte Register
72
Min/Max Configuration & Monitoring
73
Limit Line Configuration & Monitoring
74
Analog Output
76
Saving & Recalling Configurations
79
Halting Operation
79
Preset Configuration
80
Table 2-4: Reset & Power on Default Commands
80
Identification Commands
82
Calibrator Controls
83
Sensor EEPROM Commands
83
Self-Test
85
Table 2-5: Self-Test Error Indication & Limitations
85
Error Messages
89
Table 2-6: SCPI Standard Error Messages
89
Table 2-7: Device Specific Error Messages
90
Theory of Operation
93
Introduction
93
Circuit Description
93
Figure 3-1: VXI Power Meter System Block Diagram
93
Table 3-1: VXI Power Meter Circuit Assemblies
93
Analog PC Board (A1)
94
Figure 3-2: Analog PC Assembly Block Diagram
94
Calibrator Module
96
Figure 3-3: Calibrator Internal Power Standard Configuration
96
50 Mhz Oscillator
97
RF Output
97
Oven
98
Thermistor Bridge
98
Track & Hold and DAC
98
Correction Thermistor Circuit
99
Calibrator NVRAM Control Circuit
99
Sensor NVRAM
99
Sensor Interrupt
99
Digital Control Circuit
99
Digital PC Board (A2)
100
Figure 3-4: Digital PC Assembly (A2) Block Diagram
100
VXI Processor PC Board (A3)
101
VXI Interface
101
VXI Gate Array
101
Figure 3-5: VXI Processor (A3) Block Diagram
101
Shared Memory
102
Shared Memory Decoders
102
Drivers & Transceivers
102
Logical Address Switch
102
TTL Triggers & Local Bus
102
CPU & Memory
103
Processor
103
Real Time Clock/Timer
103
Interrupt Controller
103
Bus Error Timer
103
Local Address Decoders
103
Drivers & Transceivers
103
Local Memory
103
LED Drivers
103
Calibration & Testing
105
Introduction
105
Equipment Required
105
Calibration Procedures
106
Calibrator Output Power Reference Level
106
Equipment Required
106
Figure 4-1: Calibrator Reference Level Test Setup
106
Procedure
107
Calibrator Output Power
109
Calibrator Voltages
111
Calibrator Frequency Check
111
Performance Tests
112
GPIB Port Check
112
Equipment Required
112
Procedure
112
Figure 4-2: GPIB Port Test Setup
112
Power Sensor Linearity
114
Setup Parameters
115
Equipment Required
115
Figure 4-3: Power Sensor Linearity Test Setup
115
Test Procedure
116
Introduction
119
Power Supply Voltage Checks
119
Lithium Battery
120
Replacement Procedure: D
120
GPIB Test Functions
122
58542 Channel 2 Troubleshooting
122
Diagnostic Test Commands
123
Table 5-1: Diagnostic Commands
123
Parts Lists
127
Introduction
127
58542 Vxibus Universal Power Meter Parts Lists
127
VXI Power Meter, Rev: E
127
58542, VXI Chassis Assy, Rev: H
127
Pcb Assy,Analog VXI, Rev: R
128
Pcb Assy Pre-Wave, Analog VXI, Rev: N
140
Pcb Assy,Digital, Rev: K1
151
21356-A00 Pcb Assy, Pre-Wave, Digital VXI, Rev: D
153
21418 Pcb Assy, VXI Processor, Rev: B
156
List of Manufacturers
157
Table 6-1: List of Manufacturers
157
Introduction
169
Program Examples
183
Introduction
183
Sensor Calibration Examples
183
Sensor Calibration Example 1
183
Sensor Calibration Example 2
183
Sensor Calibration Example 3
183
Sensor Calibration Example 4
183
Sensor Calibration Example 5
183
Sensor Zeroing Examples
189
Error Control Examples
190
Reading Power Measurement Examples
194
Reading Power Measurements Example 1
194
Reading Power Measurements Example 2
195
Reading Power Measurements Example 3
195
Reading Power Measurements Example 4
195
Reading Power Measurements Example 5
195
Reading Power Measurements Example 6
195
Reading Power Measurements Example 7
195
Reading Power Measurements Example 8
195
Reading Power Measurements Example 9
195
Instrument Triggering Examples
204
Triggering Example 1
204
Triggering Example 2
204
Triggering Example 3
205
Triggering Example 4
205
Triggering Example 5
206
Triggering Example 6
208
Channel Configuration Examples
210
Single Sensor Power Measurement
210
Ratio Measurement
210
Difference Measurement
210
Cal Factor Examples
211
Cal Factor Example 1
211
High Speed Measurement Examples
217
High Speed Measurement Example 1
217
High Speed Measurement Example 2
218
High Speed Measurement Example 3
219
High Speed Measurement Example 4
220
High Speed Measurement Example 5
221
High Speed Measurement Example 6
223
Relative or Referenced Measurement Examples
225
Relative or Referenced Measurements Example 1
225
Relative or Referenced Measurements Example 2
225
SRQ Interrupt Examples
228
Instrument & Sensor Identification Examples
230
Instrument Identification
230
Sensor Model Identification
231
Sensor Serial Number Identification
233
Power Sensors
235
Introduction
235
Power Sensor Selection
235
Modulation Power Sensors
236
Table B-1: Power Sensor Selection Guide
236
Table B-2: Power Sensor Cal Factor Uncertainties
238
BAP Mode Limitations
239
Figure B-1: 80401A Modulation-Related Uncertainty
239
Peak Power Sensors
240
Directional Bridges
242
Power Sensor Calibration
244
Equipment Required
244
Procedure
244
Figure B-1: Power Sensor Calibration Setup
244
Introduction
247
Option 02: 256K Buffer
247
Extra Memory, 128K, 8540/02, Rev. a
247
Index
249
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Giga-tronics 58542 Specifications
General
Brand
Giga-tronics
Model
58542
Category
Measuring Instruments
Language
English
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