Products > Test Equipment
Rohde&Schwarz RTB2004 spectrum remote control
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twtb:
We are trying to use a RTB2004 for some automated spectrum measurements. The intention is to use an external application to control the scope for FFT and get spectrum traces.

The following commands are used to set the center frequency and span. We see these settings correctly applied on the screen of the scope.
SPECtrum:FREQuency:CENTer 25000000
SPECtrum:FREQuency:SPAN 10000000

Then we use this command to retrieve the trace
SPECtrum:WAVeform:SPECtrum:DATA?

This returns a big list of points, however it looks like the range is not from 20 to 30MHz (with our 25 MHz signal in the middle), but rather from 0 to 30 MHz. Our 25MHz signal is on the right when we create a plot. This is also confirmed by the "SPECtrum:WAVeform:SPECtrum:DATA:XORigin?" command, which returns 0Hz as first frequency. Unfortunately that command is read-only.

What could be the cause of this? How can we only get the trace points of the configured range?

Documentation: https://www.rohde-schwarz.com/webhelp/RTB_HTML_UserManual_en/Content/c0f97ffea4c3453c.htm
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