I have a ThumbDV running at 460K.
It runs fine with AMBEServer in half duplex mode sending either SPEECH packet or CHANNEL packet.
I am sending companded 160 byte audio packets and get back the AMBE packet OK and this runs at 50 packets per second as expected.
If I then loop the AMBE packets back I only see ~34 packets per second being looped back and if I stop sending packets it keeps going for quite a while as they have been buffered.
It also will do an internal hard reset when it gets really upset -
Received Serial data packet with type 0 and length 1:
0000: 61 00 01 00 39
I know the chip is supposed to do full duplex but has anybody tried it successfully?