On 12/11/13 4:10 PM, George Henry wrote:
FreeDV would probably work on the transponder birds if your doppler
update was fast enough... it has built-in AFC. Your only chance to
try it on an FM bird would probably be in the middle of the night...
I'd be looking at using FreeDV with the linear birds in its current
form, and definitely with Doppler correction. The PAPR is fairly high,
so the overall transponder power drain would be no more than for a SSB
transmission of similar length. Uplink power control might need to be a
bit more accurate, because the satellite's AGC may not be able to track
the brief power peaks. Likely to be a case where "less is more" when it
comes to uplink power.
--
73 de Tony VK3JED/VK3IRL
http://vkradio.com
_______________________________________________
Sent via [email protected]. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
