Mike, the automatic Doppler correction of SatPC32 updates the radio frequencies (only) when the Doppler shift of the higher one of both frequencies has changed by a certain amount of Hertz (interval). Your friend may try the following: a. Select AO-51 as satellite (mode v/u = uplink on VHF, downlink on UHF), regardless whether it is in range or not. b. Set the FM interval in menu CAT to - say - 20 (default is 600), c. Watch the changes of the Doppler shift of the UHF downlink. d. Whenever the changes exceed 20 the program should update both radio frequencies.

Does that work?

Control C must be C+, of course.

He should set the CAT baud rate to 57600 in SatPC32 (upper combo box in menu "Radio Setup") and at the radio (menu #37), the CAT delay should be 20. For detailed instructions he should read the "Hints for .... Yaesu users". The text can be displayed from the SatPC32 menu "?", "Hints (Radio) for...."

55 + 73s, Erich, DK1TB

----- Original Message ----- From: n1jez@burlingtontelecom.net To: "AMSAT BB" amsat-bb@amsat.org Sent: Monday, January 11, 2010 11:38 PM Subject: [amsat-bb] SatPC32 and CAT control

I have a weird one. I'm trying to help another ham out.

He has an FT-847 running SatPC32. He's trying to get Doppler correction working.

SatPC32ISS works fine. The radio tunes as it should.

SatPC32 does not tune. When he hits C+, the radio will go into Sat mode and preset the freqs, but when the satellite is in view, the radio doesn't tune.

He can manually tune the radio with the up/dwn button on screen.

Ideas?

73, Mike, N1JEZ AMSAT 29649 "A closed mouth gathers no feet"

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