RTL_SDR P25 decoding

[nishantp]

I am using RTL2832U and ubuntu 16.04.

I have been trying to decode P25 signal by running the rx.py script from the op25 using trunk.tsv with the control channels.

./rx.py --args 'rtl' --gains 'lna:49' -f 853.8625e6 -T trunk.tsv -q -1 -S 1000000 -P symbol -o 50000 -w
2> stderr.2

I dont see any talkgroups being identified or NAC but I can only see the spectrum being correct.
No audio either.

Could someone point out what is wrong here?

 

[Shepard_ac]

So I would do -v10 to see what the program is seeing. For example when I first started, in my trunk file I had the hex value for the NAC wrong, and could not get it to work until I saw what the program was seeing. After that it worked. Also make sure that your trunk file is in the correct format.

 

[nishantp]

Thanks, I changed the frequencies and NAC HEX values appropriately and the system works now.