TRXBenchParticipantTRXBench January 14, 2020 at 10:04 am
wondering why with the latest software the max. Displ. Ref in Harmonic Analyses is only 40dBm. The requirement for the radios I have to test is min. 50dBm and desired would be 55dBm or even 60dBm. Anyway in the former spike software we were able to adjust 50dBm which was okay but now a radio with 50dBm output power and a fixed attenuator of 40 dBm in between would reduce the level just fine but only 40 dBm can be set in the H analysis menu. If I add an additional attenuator lets say 10dB that seems to distort the readout???
By the way…, why is now the ref offset hidden in the menu. Would be nice to have back on the front panel to always know what the setting is .
Thanks for an advice
AndrewModeratorAndrew January 14, 2020 at 10:38 am
Thanks for the feedback and input. The reference offset was moved to the file menu because it is now being used across most measurements in the software, as opposed to just the sweep modes in prior versions of Spike. Rather than have a separate entry for each measurement we put it in a global location. I apologize for the confusion there.
As far as the limitation on disp ref in harmonic measurements, it is an arbitrary limitation that I can remove in the next release. To get around this limitation, you can always simulate what the software is doing with a reference offset. For example, with a 50dBm input and 40dB ref offset (with 40dB atten), you can simply set the input level to (50-40 = +10dBm) and ensure the ref offset is 0. This will ensure the receiver settings are the same as with the ref offset, but then you will have to add 40dB to your measurments…
TRXBenchParticipantTRXBench January 14, 2020 at 1:17 pm
thanks for your quick response and for the work around! Yes would be great if you could adapt it with the next release.
Have a good day
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