Hi Erich, DK1TB Congratulations for your new implementation into SatPC32 V12.8b It is really a great job seeing the frequency we are on at the satellite receiver !
73" de i8CVS Domenico ----- Original Message ----- From: "John Papay" <j...@papays.com> To: <amsat-bb@amsat.org> Sent: Friday, March 23, 2012 1:20 AM Subject: [amsat-bb] SatPC32 - New Program Feature - Doppler > Erich DK1TB has again implemented another great feature > into SatPC32 V12.8b by means of a "patch" file. You can > find it in the "downloads" link on his website, www.dk1tb.de > Scroll down to Section 7, Patches. > > I often hear others talk about meeting someone, usually a > long distance new grid square, on a certain frequency. Since > doppler is always in play, telling someone you will be on > 435.845 is meaningless unless you are both in the approximate > same location. If the other station is at LOS and you are at > AOS, your dial readings could be 15Khz apart. It's a great > way to miss a 60 second window. > > The trick here is to use the same point of reference. That reference > would be the frequency you are on at the satellite receiver. The whole > idea of doppler correction is to be at a constant frequency within the > satellite receiver passband. To do that you have to adjust your uplink > frequency constantly. And you have to adjust your downlink frequency to > continue to hear yourself or someone else using full doppler correction. > > Erich has now added the option of seeing the frequency you are on at > the satellite receiver. This is a common frame of reference so if you > tell someone you'll be on 435.845 at the satellite, they can be on that > same frequency even though your terrestrial dial frequencies will be much > different. Just adjust your receiver or use the up/down buttons in SatPC32 > to set your frequency shown in the "Sat" window. That frequency will remain > constant as your uplink and downlink are controlled by SatPC32. > > If you haven't managed to interface your radio with SatPC32, this is just > another reason to do so. Staying at a constant frequency at the satellite > allows many stations to share the bird without drifting into each other. > And being able to know exactly where you are in the passband without doing > the calculation in your head gives you more time to concentrate on making > a successful QSO! Rumor has it that even a certain Maritime Mobile > will soon be > controlling his radio with SatPC32. > > 73, > John K8YSE > > _______________________________________________ > 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 _______________________________________________ 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
