top of page

Spectrum Analyzer

 

First of all, we have to find the frequencies in use by a cellular device in the Uplink channel (frequency channel used for communication from the cellular device to the base station), 

so we could determine where in the spectrum and physically near us there is cellular activity

This can be done when using the USRP B210 as a spectrum analyzer:

UMTS uplink channel while nearby phone in active mode

This can be done with Osmocom or the built-in GNURadio spectrum analyzer.

​

For exmple, run this command in terminal:

   $   '***DIRECTORY_OF_osmocom_fft***/osmocom_fft' -F -g 20 -f 1960M -s 60M -A TX/RX

to analyze spectrum activity of UMTS in Israel.

​

Or, with uhd_fft:

   $   '***DIRECTORY_OF_uhd_fft***/uhd_fft' -f 1960M -s 6M -A TX/RX

​

bottom of page