MSO58 Spectrum View: Measuring peak amplitude

I am attempting to measure the amplitude at a specific frequency in Spectrum View on an MSO58.  Specifically I would like to record this information via SCPI commands, so the on-screen banners alongside the markers and/or cursors which display values is not of help to me (unless those values can be retrieved via SCPI commands).  This seems like it should be very easy to add, but I cannot figure it out.  If I choose to add a new measurement, the spectrum view is not an option, and so the amplitude that is reported on the measurement window is referencing the time domain signal.  I have attempted multiple different methods to gather this information including the Spectrum View Marker, Cursors set to the desired frequency, Math functions, etc., but none have worked.

I have attached an image of the signal for reference.  The frequency of interest is 25kHz.  Any help would be greatly appreciated!

Hi James,<br> <br> You should be able to be able to create Spectrum View measurements if you change the source to "Ch_1_SV_Normal" (in case of channel 1 spectrum view). Then, you can select channel power and configure the channel width (the center of the channel is the center frequency of spectrum view).<br> <br> In terms of SCPI commands, this can be done with <code>MEASUrement:ADDMEAS CPOWER</code> and then you can use <code>MEASUrement:MEAS<x>:ABANdwidth</x></code> to set the desired bandwidth.

Thanks so much for the response, Afonso!  When you say "change the source to Ch_1_SV_Normal", are you referring to changing the source in the measurement window?  Or somewhere else?  The only options I can see when I open the measurement window is Ch1-Ch8.  Thanks again.

Hi James,

If you have spectrum view enabled for channel 1, then you should be able to go into Source, press Ch1 and see Analog and SV_Normal has options. SV_Normal is the source you want for the channel power measurement.

Thanks again for the help.  I'm just not seeing a "Source" menu / hard button / soft button / etc. Sorry for the confusion.  I'm sure if it was a snake it would bite me...

After reading more documentation, I see a note that states, "If the menu shows tabs other than Standard, then optional measurement types have been installed on the instrument.  Select a tab to show the measurements for that option." 

Could this be the issue?  Are there add-ons that I would need to download in order to be able to view Analog, SV_Normal, Normal, Max Hold, and so on from the Measurements Source List?

Hi James,

The "Source" drop down menu is in the "Measure" menu. See the picture attached with this post.
From there you should be able to select channel 1 and then SV_Normal.

I do not believe you need any licenses or add-ons to see SV_Normal measurements. Just ensure that you have the latest software version installed (1.44) and you should be able to see it.

Afonso,

The FW rev update was the issue.  As soon as I updated the firmware, the option to change between "Chx Analog" and "Chx SV_Normal" was available.  Thank you so much for your help!