Great demo of FreeDV 1600 (SM1000 at one end) and SSB between AA6E and K5MVP. You can really notice the reduced audio bandwidth and ever present noise of SSB compared to FreeDV. This is just the start – we are gradually improving the low SNR robustness and speech quality of FreeDV. Thanks so much Martin for posting this.
I like watching the fading FreeDV signal. I think there is a “lowpass” effect on the signal – more power allocated to low frequency carriers. This may be due to the transmitter tx filter, or possibly the SM1000. FreeDV is only as good as the SNR of the weakest carrier. Ideally they should all be the same power. This is one of the “tuning” issues I’d like to look into over the next few months.