DDR,
Using the digital demodulation measurements, you should be able to measure the modulation quality of a 2FSK signal like GSM assuming it’s within the bandwidth of the receiver, which is only 250kHz for the SA44B. Once in digital demodulation mode, select 2FSK for the modulation type, Gaussian for the filter, and select the GSM symbol rate. You can also video trigger the captures on timeslots if necessary.
Let me know if you have follow up questions.
Andrew
Regards
