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2 MEASurement Commands
116 N1911A/1912A P-Series Power Meters Programming Guide
FETCh[1]|2|3|4[:SCALar][:POWer:AC]:DIFFerence?
[<expected_value>[,<resolution>[,<source list>]]]
This command sets the specified window’s measurement function to power
difference with relative mode off, recalculates the measurement and places
the results on the bus. The result is a power based measurement and is
expressed in the units defined by UNIT[1]|2|3|4:POWer.
Syntax
Parameters
Refer to “Optional Parameters” on page 90 for additional details on the
parameters in this command.
:POW
:AC
:SCAL
:DIFF
?
Space
expected_value
DEF
resolution
,
DEF
source list
,
FETC
1
2
3
4
Item Description/Default Range of Values
expected_value
(for the expected
power level)
The expected power level parameter can be set to
DEF or a numeric value. If a value is entered it
should correspond to that set by CONFigure
otherwise an error occurs.The units of
measurement are dBm and W. The default units are
defined by UNIT:POWer.
sensor dependent
DEF
1
- Agilent 1
- N1911A/1912A 1
- P-Series Power 1
- General Warranty 3
- Restricted Rights Legend 3
- Equipment Operation 4
- General Safety Considerations 5
- User Environment 5
- In This Guide… 6
- Contents 9
- 2 MEASurement Commands 11
- 3 CALCulate Subsystem 12
- 4 CALibration Subsystem 13
- 5 DISPlay Subsystem 13
- 6 FORMat Subsystem 14
- 7 MEMory Subsystem 14
- 8 OUTPut Subsystem 14
- 9 PSTatistic Subsystem 15
- 10 SENSe Subsystem 15
- 4[:INPut][:MAGNitude]? 403 16
- 11 STATus Subsystem 17
- 12 SYSTem Subsystem 17
- 13 TRACe Subsystem 18
- 14 TRIGger Subsystem 19
- 15 UNIT Subsystem 19
- 16 SERVice Subsystem 19
- List of Figures 23
- List of Tables 25
- Power Meter Remote Operation 29
- Introduction 33
- GPIB Address 34
- Interface Selection 34
- LAN Configuration 35
- USB Configuration 36
- Calibration 37
- Calibration Sequence 38
- Making Measurement 39
- Using MEASure? 40
- Agilent N1912A Only 43
- Using the CONFigure Command 45
- Using READ? 46
- Using INITiate and FETCh? 46
- Overview 55
- TABLE 10 56
- Frequency 1 Offset 1 57
- Frequency 2 Offset 2 57
- Frequency n Offset n 57
- Reviewing Table Data 59
- Modifying Data 59
- Making the Measurement 60
- READ? Example 61
- Averaging 62
- Auto Averaging Mode 63
- Filter Length 64
- Setting the Range 65
- Setting Offsets 66
- Setting Measurement Limits 68
- Checking for Limit Failures 70
- Using STATus 71
- Measurement Rate 72
- Trigger Mode 73
- Tri gger with Delay 74
- Output Format 75
- Command Used 75
- Fast Mode 76
- Status Reporting 78
- Condition Register 79
- Transition Filter 79
- Event Register 79
- Enable Register 80
- An Example Sequence 80
- How to Use Register 81
- The Condition Polling Method 81
- The SRQ Method 82
- Example 1: 83
- Status Registers 85
- Figure 1-9 Status System 86
- The Standard Event Register 88
- Questionable Status Register 89
- Operation Status 91
- Device Status Register 93
- Procedure 95
- Example Program 97
- Mnemonic Forms 99
- Using a Colon (:) 99
- Using a Semicolon (;) 100
- Using a Comma (,) 100
- Using Whitespace 100
- Using “?” Commands 100
- Syntax Diagram Conventions 101
- Using “*” Commands 101
- Syntax Conventions 101
- SCPI Data Types 102
- <NAN> Definition 103
- <NRf> Definition 104
- <NR1> Definition 105
- <NR2> Definition 105
- <NR3> Definition 106
- <string> Definition 106
- Input Message Terminators 107
- SCPI Compliance Information 109
- Summary of Commands 111
- Starting a Preset Example 113
- MEASurement Commands 115
- Optional Parameters 118
- Resolution 119
- Source List 119
- 2 MEASurement Commands 120
- MEASurement Commands 2 121
- CONFigure[1] 122
- Reset Condition 123
- CONFigure [1] 125
- Parameters 126
- FETCh[1] 138
- Error Messages 140
- READ[1] 156
- MEASure[1] 175
- CALCulate Subsystem 189
- CALCulate Subsystem 3 191
- Figure 3-19 CALCulate Block 191
- 3CALCulate Subsystem 192
- Query Example 195
- Error Message 195
- <boolean> 223
- CALibration Subsystem 227
- CALibration Subsystem 4 229
- CALibration[1] 230
- CALibration[1] 232
- DISPlay Subsystem 245
- Avg, Pk Watt dBm % dB 253
- Pk–Avg % dB % dB 253
- Avg, Pk, Pk–Avg % dB % dB 253
- <numeric_value> 269
- Examples 273
- FORMat Subsystem 277
- MEMory Subsystem 283
- MEMory Subsystem 7 285
- MEMory:CATalog Commands 286
- MEMory:CATalog[:ALL]? 287
- MEMory:CATalog:STATe? 289
- MEMory:CATalog:TABLe? 290
- 7MEMory Subsystem 292
- MEMory:CLEar Commands 293
- MEMory:CLEar:TABLe 296
- MEMory:FREE Commands 297
- MEMory:FREE[:ALL]? 298
- MEMory:FREE:STATe? 299
- MEMory:FREE:TABLe? 300
- MEMory:NSTates? 301
- MEMory:STATe Commands 302
- MEMory:STATe:CATalog? 303
- MEMory:TABLe Commands 306
- MEMory:TABLe:FREQuency 307
- "" 312
- OUTPut Subsystem 319
- PSTatistic Subsystem 333
- 9 PSTatistic Subsystem 334
- Reset Conditions 337
- PSTatistic:CCDF:MARKer:DELta? 341
- Parameter 347
- PSTatistic[1] 362
- Query Eample 371
- PSTatistic[1] 372
- :CCDF :TAB 373
- SENSe Subsystem 385
- [SENSe] Subsystem 387
- 10 SENSe Subsystem 388
- SENSe Subsystem 10 389
- <character_data> 406
- On Reset 410
- CSET2) 419
- <string> 420
- <boolean> 423
- GNitude]? 431
- value for the power meter 435
- Offset time: 460
- SENSe:SWEep:OFFSet:TIME 460
- Time gate length: 460
- SENSe:SWEep:TIME 460
- SENSe[1] 481
- STATus Subsystem 493
- Status Register Set Commands 496
- [:EVENt]? 497
- Device Status Register Sets 501
- Operation Register Sets 503
- STATus:OPERation 504
- STATus:PRESet 511
- Questionable Register Sets 512
- STATus:QUEStionable 513
- Status Block Diagram 517
- 11 STATus Subsystem 518
- SYSTem Subsystem 519
- SYSTem Subsystem 12 521
- SYSTem:COMMunicate:LAN:MAC? 538
- SYSTem:DISPlay:BMP 542
- SYSTem:ERRor? 543
- Error Message List 545
- 12 SYSTem Subsystem 546
- SYSTem:HELP:HEADers? 551
- SYSTem:LOCal 553
- Error messages 556
- Preset Values 557
- Command Setting Comments 558
- CDMAone 568
- CDMA2000 572
- BLUetooth 580
- Measurement Avg Avg Avg 589
- 802.11a and HiperLan2 590
- 892.11b/g 593
- TD-SCDMA 602
- Frequency 605
- Sensor measurement mode 605
- Sensor video bandwidth setup 605
- SYSTem:REMote 633
- SYSTem:RWLock 634
- SYSTem:VERSion? 635
- TRACe Subsystem 637
- Reset condition 643
- Algorithm 648
- TRACe Subsystem 13 657
- 13 TRACe Subsystem 670
- TRIGger Subsystem 671
- ABORt[1] 674
- INITiate Commands 675
- INITiate[1] 679
- INITiate[:IMMediate]:ALL 684
- TRIGger Commands 686
- TRIGger[1] 689
- TRIGger[1] 690
- 14 TRIGger Subsystem 714
- UNIT Subsystem 715
- SERVice Subsystem 721
- 16 SERVice Subsystem 724
- SERVice Subsystem 16 727
- SERVice:BIST:PEAK[1] 732
- SERVice:BIST:TBASe:STATe 734
- SERVice:BIST:TRIGger:TEST? 737
- SERVice:LAN:PHOStname 740
- SERVice:SECure:ERASe 743
- SERVice:SENSor[1] 746
- SERVice:SENSor[1] 749
- SERVice:SENSor[1] 758
- SERVice:SENSor[1] 759
- SERVice:SENSor[1] 760
- SERVice:SENSor[1] 761
- IEEE 488.2 Command Reference 765
- *ESE <NRf> 770
- *RCL <NRf> 776
- *SAV <NRf> 778
- *SRE <NRf> 779
- GPIB Universal Commands 786
- Agilent Technologies 791
- Measurement Polling Example 799
- Measurement Polling Example B 801
- Example 2: 801
- B Measurement Polling Example 802
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