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E444XA Spectrum analyzer family scpi command for local mode

Question asked by rok on Apr 25, 2013
Latest reply on Apr 26, 2013 by rok

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Hello,

I'm using the PSA spectrum analyzer family described above and I'm trying to figure out the scpi command to return the instrument back to local mode from remote mode. I looked in the E4440-90607.pdf document, but could not find a command for it. On page 334, it talks about such a command from this paragraph:

A local function that is the complement to the remote command, causing an
instrument to return to local control with a fully enabled front panel (sometimes
called: local, resume).

But I could not find such a command. Can someone post the scpi command for that?

Thanks,
rok

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joro Apr 25, 2013 11:48 PM

Hello rok,

The paragraph that you mentioned is specifically targeted for GPIB communication with the E444xA series analyzers. Are you also using GPIB to control the analyzer?
The goal of that paragraph is to explain that the GPIB interface on your PC should provide you with a command/function to put the machine back into local. If you are using the National Instruments 488.2 software layer, this function is indeed present. You can use the 'ibloc' function to put the machine back into local mode. This 'ibloc' function is not a SCPI command, but a function in the software API to control the GPIB card of your PC.
If you are using the 'Multi-device NI-488.2 Calls', the 'EnableLocal' function wil do the same as the 'ibloc' function.

I hope that this helps you to solve your problems.
With best regards,
John

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tabbott

@ joro on Apr 26, 2013 8:38 AM

Hi -

Only when controlling a PSA over GPIB does the instrument lock the front panel until the [System / Local] button is pressed. Telling the analyzer to Go to Local (GTL) is a bus level command. This is documented in the VISA documentation that comes with IO Suite. The bus level command is the viGpibControlREN command. Here is an example snippet of code to do this: stat = viGpibControlREN(viPSA, VI_GPIB_REN_ADDRESS_GTL);
The PSA also has a special command to allow the front panel to be locked and unlocked. This is especially helpful when controlling the instrument via LAN. The command is “SYST:KLOCK 0|1” The 89601A/89601B VSA software send the command “SYST:KLOCK 1” whenever it takes control of the PSA, and it also sends the SYST:MESS ‘ ‘ command to write a message at the bottom of the screen to let users know that it is in control of the analyzer.

Regards -

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rok @ tabbott on May 11, 2016 10:35 AM

Hello,

Thanks for the reply. Yes, I'm using GPIB to control the PSA instrument. I found a code snippet from Local Button which I adapted to C# and it seems to work.

Thanks,
rok

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3 Replies

joro Apr 25, 2013 11:48 PM
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Hello rok,

The paragraph that you mentioned is specifically targeted for GPIB communication with the E444xA series analyzers. Are you also using GPIB to control the analyzer?
The goal of that paragraph is to explain that the GPIB interface on your PC should provide you with a command/function to put the machine back into local. If you are using the National Instruments 488.2 software layer, this function is indeed present. You can use the 'ibloc' function to put the machine back into local mode. This 'ibloc' function is not a SCPI command, but a function in the software API to control the GPIB card of your PC.
If you are using the 'Multi-device NI-488.2 Calls', the 'EnableLocal' function wil do the same as the 'ibloc' function.

I hope that this helps you to solve your problems.
With best regards,
John
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- tabbott @ joro on Apr 26, 2013 8:38 AM
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  Hi -
  
  Only when controlling a PSA over GPIB does the instrument lock the front panel until the [System / Local] button is pressed. Telling the analyzer to Go to Local (GTL) is a bus level command. This is documented in the VISA documentation that comes with IO Suite. The bus level command is the viGpibControlREN command. Here is an example snippet of code to do this: stat = viGpibControlREN(viPSA, VI_GPIB_REN_ADDRESS_GTL);
  The PSA also has a special command to allow the front panel to be locked and unlocked. This is especially helpful when controlling the instrument via LAN. The command is “SYST:KLOCK 0|1” The 89601A/89601B VSA software send the command “SYST:KLOCK 1” whenever it takes control of the PSA, and it also sends the SYST:MESS ‘ ‘ command to write a message at the bottom of the screen to let users know that it is in control of the analyzer.
  
  Regards -
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  - rok @ tabbott on May 11, 2016 10:35 AM
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    Correct Answer
    Hello,
    
    Thanks for the reply. Yes, I'm using GPIB to control the PSA instrument. I found a code snippet from Local Button which I adapted to C# and it seems to work.
    
    Thanks,
    rok
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E444XA Spectrum analyzer family scpi command for local mode

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