Kalibrate rtl

What is Kalibrate-rtl?

Kalibrate or (kal), can scan for GSM base stations in a given frequency band (GSM850,GSM900) and can use those GSM base stations to calculate the local oscillator frequency offset.

•     So first of all connect Your RTL-SDR device. For conformation Type : lsusb

Here You can see the SDR Device is connected

Installation :

                           sudo apt install kalibrate-rtl

 

• After the instalation type kalibrate-rtl or just type kal ( So it will show the help ).

• Now start Scaning by specifying the GSM Band.

kal -s (specifying the GSM Band ) -g (Gain in number)

• Now the scanning is started it will give all the downlink frequencies of each channel.

Finding frequency offset :

• For finding frequency offset type : kal -c (channel number which you find in scanning) -g (gain) or if it does not show any result add -e option also.

DEMONSTRATION :