Dan Blasberg wrote: > No, P25 decoder is built into the radio itself, much like the ICOM > radios.
Not 100% true. Raytheon JDS will hook an external P25 encoder/decoder to your existing repeater. You ship them the repeater and $10K, and they'll ship it back when they're done. > And no one has come out with a "dongle" for P25 probably due > to the expense of the codec from DVSI for IMBE. That may change for > phase 2 P25 which will be using an AMBE codec from DVSI. The question > is, is it the same AMBE codec used for D-Star and if so, can someone > write the firmware into a dongle to add both P25 and D-Star to the > same radio. If that were to happen that would be pretty kick. AMBE is AMBE. The framing/encapsulation of that AMBE in a P25 or D-Star overall bitstream is completely different, but if you can figure out how to copy the frames, you can extract the AMBE bits and shove them through DVSI's CODEC to get audio, and vice-versa. DVSI sells a chipset that's roughly $25 each in small quantity to handle the AMBE CODEC part of the job. Nate WY0X
