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PSA SCPI for Reference Level (CDMA2K SEM)

Question asked by herohest on Jun 24, 2009
Latest reply on Apr 28, 2011 by herohest

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I make a spectrum emission mask measurement (SEM) with PSA E4445A,and use the following command

":INST CDMA2K"
":CONF:SEM"

but while I send the command ":DISP:WIND:TRAC:Y:RLEV 10 DBM" ,change the reference level to 10 dBm,
PSA retuen a error message "-113,"Undefined header"

Does anybody know the solution?

thanks in advance.

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odanzy Jun 24, 2009 10:54 PM
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Take a look at page 295 in the PDF version of the PSA cdma2000 User's & Programmer's Guide. The command is slightly different than the standard command.

Spectrum - Y-Axis Reference Level
:DISPlay:SPECtrum[n]:WINDow[m]:TRACe:Y[:SCALe]:RLEVel<power>
:DISPlay:SPECtrum[n]:WINDow[m]:TRACe:Y[:SCALe]:RLEVel?

Sets the amplitude reference level for the y-axis.

n, selects the view, the default is RF envelope.
          — n=1, m=1 Spectrum
          — n=1, m=2 I/Q Waveform
          — n=1, m=2 I and Q Waveform (Basic, W-CDMA, cdma2000)
          — n=3, m=1 I/Q Polar (Basic, W-CDMA, cdma2000)
          — n=4, m=1 Linear Spectrum (Basic, W-CDMA, cdma2000)
m − selects the window within the view. The default is 1.

Factory Preset: 0 dBm, for Spectrum
Range: − 250 to 250 dBm, for Spectrum
Default Unit: dBm, for Spectrum

Remarks: May affect input attenuator setting.
You must be in Basic, cdmaOne, cdma2000, 1xEV-DO, W-CDMA GSM w/EDGE, NADC, or PDC mode. Set the mode with INSTrument:SELect.
Front Panel Access: When in Spectrum measurement: Amplitude Y Scale, Ref Level
History: Added revision A.02.00
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herohest Jun 25, 2009 2:28 AM
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Thanks odanzy.

but none of them works.My check steps are followed,
first,I operate the PSA using front panel key,
Mode-->CDMA2000,
Measure-->SEM,
Meas Setup--> Restore Meas Default,
Amplitude-->ref level 10 dbm
then I use SCPI command to read ref level
":DISP:SPEC:WIND:TRAC:Y:RLEV?"        return 0
":DISP:SPEC1:WIND1:TRAC:Y:RLEV?"     return 0
":DISP:SPEC1:WIND2:TRAC:Y:RLEV?"     return 0
":DISP:SPEC3:WIND1:TRAC:Y:RLEV?"     no response
":DISP:SPEC4:WIND1:TRAC:Y:RLEV?"     no response

and I tried the following commands
":DISPlay:WAVeform[n]:WINDow[m]:TRACe:Y[:SCALe]:RLEVel<power>"
":DISPlay:WAVeform[n]:WINDow[m]:TRACe:Y[:SCALe]:RLEVel?"
None of them works too.

Does anybody know the solution and verify on the instrument?

Thanks
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dgun Jun 29, 2009 4:31 PM
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I'm pretty sure those commands only work in spectrum mode. In spectral mask mode, I don't think there is a way to set or query the ref. level remotely, unfortunately.
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herohest Jul 2, 2009 12:27 AM
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Thank dgun for his confidently answer.
I'm pretty sure the ":DISP:WIND:TRAC:Y:RLEV 10 DBM" works in WCDMA SEM mode,too.
Could agilent add the command in CDMA2K SEM mode?
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dgun Jul 2, 2009 11:37 AM
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You'll have to call in and ask for PSA software support. I know they have added commands like this in the past based on customer request.
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herohest Apr 28, 2011 12:22 AM
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Does anybody know this case?
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PSA SCPI for Reference Level (CDMA2K SEM)

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