How to record PMR better?

[KjellKriminell6]

Hi!
I want to listen to all 16 of the european PMR channels.
But when recording european PMR-traffic it often misses the best transmission and records off-center.
I can also see this by looking at the "frequency" in the GUI at port 8000. it does not match the TX frequency.

Is there a way to define the wanted frequencys more precise, for example define the steps to be searched for in the config file?
or perhaps a way to define just my wanted 16 frequencys and skip the rest?

thanks a lot

Kjell