[amsat-bb] FreeDV (was: D STAR)

Tony Langdon vk3jed at gmail.com
Mon Nov 11 22:19:38 PST 2013

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

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