Re: [Discuss-gnuradio] Getting my feet wet on the Tx side of the world

[ikjtel]

> The TX side of the project is still fairly primitive--they have a
> hand-coded flow-graph that implements an APCO-25 4-level
>  FSK modulator, using an *audio* sink, and then carefully plugging the
> audio into the guts of a physical radio, right at the [snipped]

Soundcard output direct into a TX is something we'd actually like to have 
working, but as of yet it hasn't been tested successfully by anyone that I know 
of.  Getting this to work would be HUGE since it would enable use of TX RF 
hardware that has already received FCC certification in various bands...

> So, I decided to adapt what they'd done on the audio side to driving a
> USRP directly (with an appropriate RF card, naturally).
>

Already done!  Sorry the docs aren't better.  Check out op25_tx.py

Max