Greetings everyone,
I hope everyone is having a good day.
I have installed GNURadio 3.7 and I wanted to see the GSM signals of my phone (when I call someone) with the application "USRP Spectrum Scanner (FFT)". But, I was unable to see any fluctiations in the spectrum from 890 MHz to 915 MHz & 1710 MHz to 1785 MHz. My location is in Germany and I own a sim card of Aldi Talk (MEDIONmobile).
Then I tried with my phone's Bluetooth 5.0 and I could see the frequency hopping from 2.4 GHz to 2.44 GHz along with the light Wi-Fi signals in the spectrum.
I have the Etttus Research USRP B210 with Bandwidth of 56 MHz (of the front-end filter) and thus I am setting the sampling rate to 40 MHz. The antenna also works from 850 MHz to 6.5 GHz. so no problem with that as well.
What could be reason for me not able to see my phone's GSM signals in the spectrum scanner?
Your help would be very valuable.
Best regards,
Amrit Zoad
+49 177 8474550