[amsat-bb] Making the transponder sats as easy as the fm birds

[Joe Werth]

Vince,
I computer control the uplink Doppler only and manually tune the RX downlink, no matter if V/U or U\V.  Seems to work for me. 

Joe - KE9AJ

Sent from my iPad

> On Apr 14, 2018, at 11:43 AM, Vince Fiscus, KB7ADL <vlfiscus at mcn.net> wrote:
> 
> At 12:29 PM 4/14/2018 +0000, Paul Stoetzer <n8hm at arrl.net>wrote:
>> The general guidance in the early years of operating linear transponders was to adjust your transmitter to maintain a constant receive frequency. Experience with the Mode J transponder on FO-12 caused the gudiance to be updated to tuning the higher of the two frequencies. See the Sept 14, 1987 Amateur Satellite Report for more details ( http://www.ka9q.net/asr-1987.pdf).
> 
> 
> I've always tended to adjust the uplink to the satellite, even
> on mode J.  Never been chewed out for doing it that way though.
> 
> My question,  for OM's doing computer control of their rigs. Is the
> software following the rule, or is it adjusting both uplink and
> downlink simultaneously?
> 
> I've always been curious about that.
> 
> Still using InstantTrack here.  :-)
> 
> KB7ADL
> 
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