See The One True Rule for Doppler Tuning http://www.amsat.org/amsat/features/one_true_rule.html
73 Trevor M5AKA
--- On Tue, 14/5/13, Rolf Krogstad rolf.krogstad@gmail.com wrote:
From: Rolf Krogstad rolf.krogstad@gmail.com Subject: [amsat-bb] adjusting for Doppler To: amsat-bb@amsat.org Date: Tuesday, 14 May, 2013, 20:47 I am sure this has been hashed over in the past but as a novice to the birds I am not sure how to proceed when operating one of the linear transpondesr.
I looked at the latest editions of two ARRL publications: ARRL Operators Manual, edition 9, copyright 1007-2011 ARRL Satellite Handbook, copyright 2010
Both are very clear about how one should allow for Doppler shift on the linear transponders.
One clearly says find your spot and then use the downlink VFO to adjust for Doppler shift, don't touch the uplink VFO after the initial setting of the frequency.
The other clearly says find your spot and then use the uplink VFO to adjust for Doppler shift, don't touch the downlink VFO after the initial setting of the frequency.
Color me confused...
Rolf NR0T Amsat #38889 EN34 _______________________________________________ Sent via AMSAT-BB@amsat.org. 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