My testing was limited due to 'only' having a HackRF to test with. Once support
for that is added I'll be able to comment more.
Excellent work Max and the whole OP25 team!
Sent from my iPhone
On Mar 22, 2017, at 10:31, ikj1234i(a)yahoo.com
[op25-dev] <op25-dev(a)yahoogroups.com> wrote:
The OP25 Group in 2009/2010 added a software TX for P25 FDMA which was based on the
fullrate MBE codec contribution made by Pavel Yazev.
Today with the addition of a halfrate encoder we announce a software TX for two amateur
radio digital voice modes (dstar and ysf) as well as 2-slot DMR Base Station support in
addition to the existing P25 TX. The ysf support includes both halfrate and fullrate
voice modes. At this time my impression of the voice quality is very good to excellent in
all modes except dstar where it may be considered only fair; we believe the issues with
the dstar codec will be very amenable to improvement over time.
The software has been tested successfully using a PC+soundcard connected to an Icom
IC-820H via the high-speed (packet 9,600 data input) connector in the back of the radio.
Support for SDR TX devices such as the hackrf and usrp will be added at some point.
To get started, clone the repo, checkout the 'max' branch, and open the doc html
file in your browser:
git clone
https://git.osmocom.org/op25
cd op25
git checkout max
Then use your favorite web browser to view the file
op25/gr-op25_repeater/apps/tx/doc.html within the repo.
73
Max