3 Mar
2016
3 Mar
'16
2:40 p.m.
Beyond what others have mentioned like the TNC-Pi
(nice kit), using a $7
USB soundcard and Direwolf will provide superior decodes.
Yes, I wonder why on earth they use a hardware AFSK modem chip in that design...
I can see a place for an adapter board that provides PTT keying, possibly isolated
audio interface, etc for the Pi, but it should always just do A/D and D/A conversion
of the audio and leave the processing to software. That works so much better, and
it enables the development of alternative modem designs without having to change
the hardware every time.
Rob