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Power Meter Remote Operation
Zeroing and Calibrating the Power Meter
Agilent E4418B/E4419B Programming Guide 1-11
Zeroing and Calibrating the Power Meter
This section describes how to zero and calibrate the power meter.
The calibration and zeroing commands are overlapped commands refer to
“Using the Operation Complete Commands”, on page 1-89 to determine
when the commands are complete.
Zeroing
Zeroing adjusts the power meter’s specified channel for a zero power
reading with no power applied to the power sensor.
The command used to zero the power meter is:
CALibration[1|2]:ZERO:AUTO ONCE
The command assumes that there is no power being applied to the sensor.
It turns the power reference oscillator off, then after zeroing, returns the
power reference oscillator to the same state it was in prior to the command
being received. Zeroing takes approximately 10 seconds depending on the
type of power sensor being used.
When to Zero?
Zeroing of the power meter is recommended:
• when a 5
0
C change in temperature occurs.
• when you change the power sensor.
• every 24 hours.
• prior to measuring low level signals. For example, 10 dB above the
lowest specified power for your power sensor.
Calibration
Calibration sets the gain of the power meter using a 50 MHz 1 mW
calibrator as a traceable power reference. The power meter’s POWER REF
output or a suitable external reference is used as the signal source for
calibration. An essential part of calibrating is setting the correct reference
calibration factor for the power sensor you are using. The Agilent 8480
series power sensors require you to set the reference calibration factor.
The Agilent E-series power sensors set the reference calibration factor
prog.book Page 11 Thursday, June 7, 2001 2:55 PM
- Programming Guide 1
- Legal Information 3
- Limitation of Warranty 4
- Exclusive Remedies 4
- Equipment Operation 5
- General Safety Considerations 6
- IEC 1010-1 Compliance 7
- Statement of Compliance 7
- User Environment 7
- Installation Instructions 7
- About this Guide 8
- List of Related Publications 10
- Table of Contents 11
- Table System... 1-45 12
- List of Figures 23
- List of Tables 25
- Introduction 28
- Interface Selection 29
- GP-IB Address 29
- RS232/RS422 Configuration 30
- Calibration 37
- Making Measurements 40
- Using MEASure? 41
- Using the CONFigure Command 46
- Using READ? 47
- Using INITiate and FETCh? 47
- Overview 56
- TABLE 20 57
- Making the Measurement 65
- TABLE 10 67
- Resolution 74
- Averaging 74
- Setting Offsets 77
- Setting Measurement Limits 79
- Setting Window Limits 81
- Checking for Limit Failures 81
- Measuring Pulsed Signals 84
- Triggering the Power Meter 87
- Idle State 89
- Initiate State 90
- Event Detection State 90
- Trigger Delay 91
- Trigger Mode 92
- Output Format 94
- Command Used 94
- 200 Readings/Sec 94
- Dual Channel Considerations 95
- How to Use Registers 100
- Power Meter Remote Operation 101
- Status Reporting 101
- Status Register 105
- Device Status Register 113
- Example Program 117
- Syntax Conventions 121
- SCPI Data Types 121
- Input Message Terminators 127
- Quick Reference 128
- MEASurement Commands 129
- CALCulate Subsystem 130
- CALibration Subsystem 131
- DISPlay Subsystem 131
- FORMat Subsystem 131
- MEMory Subsystem 132
- OUTPut Subsystem 132
- [SENSe] Subsystem 133
- STATus Subsystem 134
- SYSTem Subsystem 135
- TRIGger Subsystem 135
- UNIT Subsystem 136
- SERVice Subsystem 136
- SCPI Compliance Information 137
- SYSTem:RWLock 138
- TRANsmit:ECHO 138
- UNIT[1 138
- MEASurement Instructions 139
- CONFigure[1 145
- FETCh[1 159
- READ[1 173
- MEASure[1 187
- Figure 3-1: CALCulate Block 203
- CALCulate Block 203
- SENSe1 Block 203
- SENSe2 Block 203
- The CALCulate[1 204
- on the 205
- enabled 207
- disabled 207
- CALCulate[1 208
- CALCulate[1 213
- Error Message 218
- Conflict” occurs 218
- The CALCulate[1 221
- CALibration[1 231
- CALibration[1 234
- DISPlay[:WINDow[1 248
- Query Example 250
- MEMory:CATalog Node 267
- MEMory:CATalog[:ALL]? 268
- MEMory:CATalog:STATe? 270
- MEM :CAT :STAT ? 270
- MEMory:CATalog:TABLe? 271
- MEMory:CLEar Node 273
- MEMory:CLEar:TABLe 275
- MEM :CLE :TABL 275
- The MEMory:FREE Node 276
- MEMory:FREE[:ALL]? 277
- MEM :FREE :ALL 277
- MEMory:FREE:STATe? 278
- :FREE :STAT ? 278
- MEMory:FREE:TABLe? 279
- MEM :FREE :TABL 279
- MEMory:NSTates? 280
- MEM :NST 280
- The MEMory:STATe Node 281
- MEMory:STATe:CATalog? 282
- MEM :STAT :CAT 282
- MEMory:TABLe Node 285
- 80 Frequency 80 290
- OUTput Subsystem 295
- SENSe Subsystem 303
- Number of Averages 309
- • Auto-averaging is disabled 312
- CSET2) table 319
- B for channel B 329
- value is set but the 330
- [:INPut][:MAGNitude]? 333
- is not affected 333
- <numeric_value> 334
- or the values 336
- B for channel A 336
- “Hardware missing” occurs 359
- Device Status Register Sets 369
- Operation Register Sets 370
- STATus:PRESet 378
- Questionable Register Sets 379
- RO 396
- SYSTem:ERRor? 410
- SYStem:LOCal 412
- Command Setting Comments 413
- Setting Comments 414
- SYSTem:REMote 416
- SYST :REM 416
- SYSTem:VERSion? 419
- ABORt[1 423
- INITiate Node 424
- TRIGger Node 428
- IEEE488.2 Command Reference 453
- Universal Commands 455
- *SRE <NRf> 471
- TTL outputs 1-55 481
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