Notebook of Time and Frequency Experiments
One of my Gnuradio projects is a tool that records IQ data covering 375 kHz -- which is enough to capture an entire HF ham band (except for 80/75M). A neat trick is to retransmit such a recording to allow…
With op25 successfully decoding the control channel, now you just need to set up the trunking configuration. To do this, you'll probably need to set up three files: 1. trunk.tsv defines the sites to be monitored. 2. site_name.tsv provides a…
The info in this and in part 4 was aided tremendously by several folks on the "op25-dev" mailing list. Without their help, I would not have even known where to start in getting my system running. I hope that what…
Here's how to install the OP25 scanning software. If you don't already have Gnuradio installed on a Linux system, do those two things first. Any current Linux distribution works. I use Linux Mint which is very similar to Ubuntu. The…
A couple of weeks ago at the Dayton Hamvention I bought a fancy Whistler TRX2 scanner that can receive the new P25 digital trunking system that's been rolled-out statewide here in Ohio. Unfortunately, after a lot of attempts, I still…