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*Subject*: [amsat-bb] One True Rule Doppler tuning questions*From*: "Jim Cottle" <jim_cott@xxxxxxxxxxxxx>*Date*: Thu, 17 Jul 2003 22:26:01 -0700

Hello All, I am authoring a program to implement the one true rule for the combination of NOVA and the IC910 since there are not really ones usable to me. This is going to be a great program. I have a problem though. When I adjust to NOVA's downlink with doppler correction, then, with frequencies locked at the satellite, go to the predicted transmit frequency, I do not find my station. I always have a realtively unpredictable offset to account for. I cannot quite figure out what i am doing wrong. COuld someone help me with a step by step procedure to check myself? Here is what I am doing: 1. Find the Beacon with the radio 2. enter the proper LO into NOVA, so that the actual predicted downlink frequency matches the rig with doppler correction and 2401.323 entered at the satellite. this turns out to be about 2255.999 990 for my UEK-3000. 3. With frequencies locked at the satellite, I match 2401.323 to the same calculated MB value on the Uplink side (either U-band or L1-band). I thus move down from the top of the L1 band by the same amount as moving up on the S2 band. After doing this shouldn't I get predicted frequencies from NOVA that, when i tune my uplink frequency to, I should hear my station on the downlink? (assuming I now move off the MB frequency onto a MB+20 value or so?) What am I missing? some sort of offset correction for inaccuracy? Jim AC4EA ac4ea@arrl.net ac4ea@amsat.org ---- Sent via amsat-bb@amsat.org. Opinions expressed are those of the author. Not an AMSAT member? Join now to support the amateur satellite program! To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

**Follow-Ups**:**RE: One True Rule Doppler tuning questions***From:*Gunther Meisse

**Re: One True Rule Doppler tuning questions***From:*Joe Ennis

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