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EXA N9010A - How to read out demod-trace

Question asked by OnlyNow on Feb 13, 2011
Latest reply on Feb 16, 2011 by OnlyNow

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Hello,
i am using an EXA N9010A Signal Analyzer.
Here i have a demodulated waveform which i want to read to my program with using SCPI-commands.
Problem is that i cant found any scpi-command to do this.
The current state is that i see the trace in the analyzer in the window "Demod Waveform" - How can i get this into the PC?

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Other questions are:
1. What is the scpi-command for: Button "View/Display" + "Demod"?
(No online help included on the instrument for this button)

2. What is the scpi-command for: Button "View/Display" + "Metric Settings" + "SINAD, Distortion THD" --> OFF ?
(There is the wrong scpi-command in the online-help for this)

Thanks for the help

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tabbott

Feb 15, 2011 8:43 AM

Hi -

To read the demod waveform, you can use either the READ, MEASure, or FETCh commands as follows:

READ|MEASure}FETCh :AMx|FMx|PMx where “x” is as follows:

X=2        This query returns the Demod Min Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=3        This query returns the Demod Max Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=4        This query returns the Demod Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=5        This query returns the Demod Average Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

The SCPI command that is equivalent to pressing View/Display, Demod is the following:

ISPlay:AM|FM|PM:VIEW[:SELect] DEMod

The SCPI command that is equivalent to pressing View/Display, Metric Settings, SINAD, Distortion THD ON|OFF is the following:

ISP:AM|FM|PM:VIEW:METRics:DISTortion[:STATe] ON|OFF|0|1

Glad to help -

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OnlyNow Feb 16, 2011 6:26 AM

Thanks for the help.
I always thought up to now that the number in the command READ:FM2,3,4,5,6 is the name of a trace.
But i didnt know that i defines the returned result.
But i works.
Meanwhile i solved it by saving the measurement as a file and read-out the file-content over a shared directory.

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2 Replies

tabbott Feb 15, 2011 8:43 AM
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Hi -

To read the demod waveform, you can use either the READ, MEASure, or FETCh commands as follows:

READ|MEASure}FETCh :AMx|FMx|PMx where “x” is as follows:

X=2        This query returns the Demod Min Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=3        This query returns the Demod Max Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=4        This query returns the Demod Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

X=5        This query returns the Demod Average Trace data as a list of x,y pairs. The x-axis values are in units of seconds. The y-value units depend on the current view.

The SCPI command that is equivalent to pressing View/Display, Demod is the following:
                ISPlay:AM|FM|PM:VIEW[:SELect] DEMod

The SCPI command that is equivalent to pressing View/Display, Metric Settings, SINAD, Distortion THD ON|OFF is the following:
                ISP:AM|FM|PM:VIEW:METRics:DISTortion[:STATe] ON|OFF|0|1

Glad to help -
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OnlyNow Feb 16, 2011 6:26 AM
Mark Correct
Correct Answer
Thanks for the help.
I always thought up to now that the number in the command READ:FM2,3,4,5,6 is the name of a trace.
But i didnt know that i defines the returned result.
But i works.
Meanwhile i solved it by saving the measurement as a file and read-out the file-content over a shared directory.
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EXA N9010A - How to read out demod-trace

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