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58542 VXIbus Universal Power Meter

7-2 Publication 21555, Rev. E, September 2002

11" x 17" (Landscape) pages follow continuing Chapter 7 of the 58542 Publication

Main Page

Table of Contents5
About this Publication13
Conventions15
Record of Publication Changes17
Special Configurations19
Introduction21
Description21
Items Furnished22
Items Required22
Tools & Test Equipment22
Storage22
Cooling22
Receiving Inspection22
Safety Precautions23
Reshipment Preparation23
Specifications24
Range24
Accuracy24
Zeroing Accuracy (Standard CW Sensors)25
Figure 1-1: Instrument Linearity26
Meter Functions27
Measurement Speed27
Inputs/Outputs28
Power Requirements28
General Specifications29
Operation31
Preparation for Use31
Installation31
Initial Setup32
Logical Address32
Figure 2-1: Setting the Logical Address32
Data Transfer Bus Arbitration33
Figure 2-2: Default Bus Arbitration Settings33
Sensor Precautions34
Operation35
SCPI Command Interface35
Sensor Calibration & Zeroing35
Figure 2-3: SCPI Subsystem Model35
Sensor & Channel Configuration36
Measurement Triggering36
Memory Functions36
IEEE 488.2 Required Commands37
Diagnostic Commands37
Table 2-1: IEEE Required Command Codes37
Calculate Subsystem Commands38
Figure 2-4: Calculate Subsystem Commands38
Sense Subsystem Commands39
Figure 2-5: Sense Subsystem Command Tree39
Trigger Subsystem Commands41
Figure 2-6: Trigger Subsystem Command Tree41
GPIB Command Syntax42
Commands in Brackets42
Programmer Selective Parameters42
Italics in Syntax Descriptions42
Query Format42
Linking Command Strings42
Measurement Data Output Format42
Table 2-2: VXI GPIB Command Syntax43
Sensor Calibration & Zeroing47
Sensor Calibration47
Sensor Zero48
Reading Power Measurements49
Special Errors50
Instrument Triggering51
Figure 2-7: Trigger Subsystem Command Tree51
Arming the Triggering Cycle54
Channel Configuration55
Cal Factor Correction57
Vprop59
Cal Factor Error Control59
High Speed Measurements60
Operating Mode Control60
Approximate Measuring Speeds62
Table 2-3: Approximate Measurement Speeds62
Triggering Notes63
Measurement Level Notes63
Peak Power Sensor Triggering64
Averaging66
Relative or Referenced Measurements67
Error Control67
Offsets68
SRQ & Status Monitoring69
Event Status Register71
Figure 2-9: SCPI Status Structure Registers71
Status Byte Register72
Min/Max Configuration & Monitoring73
Limit Line Configuration & Monitoring74
Analog Output76
Saving & Recalling Configurations79
Halting Operation79
Preset Configuration80
Table 2-4: Reset & Power on Default Commands80
Identification Commands82
Calibrator Controls83
Sensor EEPROM Commands83
Self-Test85
Table 2-5: Self-Test Error Indication & Limitations85
Error Messages89
Table 2-6: SCPI Standard Error Messages89
Table 2-7: Device Specific Error Messages90
Theory of Operation93
Introduction93
Circuit Description93
Figure 3-1: VXI Power Meter System Block Diagram93
Table 3-1: VXI Power Meter Circuit Assemblies93
Analog PC Board (A1)94
Figure 3-2: Analog PC Assembly Block Diagram94
Calibrator Module96
Figure 3-3: Calibrator Internal Power Standard Configuration96
50 Mhz Oscillator97
RF Output97
Oven98
Thermistor Bridge98
Track & Hold and DAC98
Correction Thermistor Circuit99
Calibrator NVRAM Control Circuit99
Sensor NVRAM99
Sensor Interrupt99
Digital Control Circuit99
Digital PC Board (A2)100
Figure 3-4: Digital PC Assembly (A2) Block Diagram100
VXI Processor PC Board (A3)101
VXI Interface101
VXI Gate Array101
Figure 3-5: VXI Processor (A3) Block Diagram101
Shared Memory102
Shared Memory Decoders102
Drivers & Transceivers102
Logical Address Switch102
TTL Triggers & Local Bus102
CPU & Memory103
Processor103
Real Time Clock/Timer103
Interrupt Controller103
Bus Error Timer103
Local Address Decoders103
Drivers & Transceivers103
Local Memory103
LED Drivers103
Calibration & Testing105
Introduction105
Equipment Required105
Calibration Procedures106
Calibrator Output Power Reference Level106
Equipment Required106
Figure 4-1: Calibrator Reference Level Test Setup106
Procedure107
Calibrator Output Power109
Calibrator Voltages111
Calibrator Frequency Check111
Performance Tests112
GPIB Port Check112
Equipment Required112
Procedure112
Figure 4-2: GPIB Port Test Setup112
Power Sensor Linearity114
Setup Parameters115
Equipment Required115
Figure 4-3: Power Sensor Linearity Test Setup115
Test Procedure116
Introduction119
Power Supply Voltage Checks119
Lithium Battery120
Replacement Procedure: D120
GPIB Test Functions122
58542 Channel 2 Troubleshooting122
Diagnostic Test Commands123
Table 5-1: Diagnostic Commands123
Parts Lists127
Introduction127
58542 Vxibus Universal Power Meter Parts Lists127
VXI Power Meter, Rev: E127
58542, VXI Chassis Assy, Rev: H127
Pcb Assy,Analog VXI, Rev: R128
Pcb Assy Pre-Wave, Analog VXI, Rev: N140
Pcb Assy,Digital, Rev: K1151
21356-A00 Pcb Assy, Pre-Wave, Digital VXI, Rev: D153
21418 Pcb Assy, VXI Processor, Rev: B156
List of Manufacturers157
Table 6-1: List of Manufacturers157
Introduction169
Program Examples183
Introduction183
Sensor Calibration Examples183
Sensor Calibration Example 1183
Sensor Calibration Example 2183
Sensor Calibration Example 3183
Sensor Calibration Example 4183
Sensor Calibration Example 5183
Sensor Zeroing Examples189
Error Control Examples190
Reading Power Measurement Examples194
Reading Power Measurements Example 1194
Reading Power Measurements Example 2195
Reading Power Measurements Example 3195
Reading Power Measurements Example 4195
Reading Power Measurements Example 5195
Reading Power Measurements Example 6195
Reading Power Measurements Example 7195
Reading Power Measurements Example 8195
Reading Power Measurements Example 9195
Instrument Triggering Examples204
Triggering Example 1204
Triggering Example 2204
Triggering Example 3205
Triggering Example 4205
Triggering Example 5206
Triggering Example 6208
Channel Configuration Examples210
Single Sensor Power Measurement210
Ratio Measurement210
Difference Measurement210
Cal Factor Examples211
Cal Factor Example 1211
High Speed Measurement Examples217
High Speed Measurement Example 1217
High Speed Measurement Example 2218
High Speed Measurement Example 3219
High Speed Measurement Example 4220
High Speed Measurement Example 5221
High Speed Measurement Example 6223
Relative or Referenced Measurement Examples225
Relative or Referenced Measurements Example 1225
Relative or Referenced Measurements Example 2225
SRQ Interrupt Examples228
Instrument & Sensor Identification Examples230
Instrument Identification230
Sensor Model Identification231
Sensor Serial Number Identification233
Power Sensors235
Introduction235
Power Sensor Selection235
Modulation Power Sensors236
Table B-1: Power Sensor Selection Guide236
Table B-2: Power Sensor Cal Factor Uncertainties238
BAP Mode Limitations239
Figure B-1: 80401A Modulation-Related Uncertainty239
Peak Power Sensors240
Directional Bridges242
Power Sensor Calibration244
Equipment Required244
Procedure244
Figure B-1: Power Sensor Calibration Setup244
Introduction247
Option 02: 256K Buffer247
Extra Memory, 128K, 8540/02, Rev. a247
Index249

Giga-tronics 58542 - Page 170

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