For some reason, my SatPC32 has stopped correctly compensating for Doppler shift on FO-29. I'm continually having to "find myself" all over the passband, making adjustments throughout the pass, just like the old days when everything was manual.
I've updated the Keps. I marked the uplink and downlink freqs at time of closest approach on a high-elevation pass, and re-edited my Doppler.SQF with those numbers.
SatPC32 is talking to the rig, and it does make regular changes to both uplink and downlink frequencies -- they just happen not to be correct.
I'm stumped! Any thoughts?--
Mark D. Johns, KØMDJ Decorah, Iowa USA EN43 ----------------------------------------------- "Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain
Hi Mark,
I have used for FO-29 this pair of central frequencies:
FO-29,435851.95,145951.6,USB,LSB,REV,0,0,Transponder
they are working for me on an FT-736R.
These are used on http://amsat.org.ar/pass.htm using wispDDE
Hope you get on sync with this nice Sat.
73, lu7abf, Pedro Converso
On Sat, Oct 22, 2016 at 5:32 PM, Mark Johns via AMSAT-BB amsat-bb@amsat.org wrote:
For some reason, my SatPC32 has stopped correctly compensating for Doppler shift on FO-29. I'm continually having to "find myself" all over the passband, making adjustments throughout the pass, just like the old days when everything was manual.
I've updated the Keps. I marked the uplink and downlink freqs at time of closest approach on a high-elevation pass, and re-edited my Doppler.SQF with those numbers.
SatPC32 is talking to the rig, and it does make regular changes to both uplink and downlink frequencies -- they just happen not to be correct.
I'm stumped! Any thoughts?--
Mark D. Johns, KØMDJ Decorah, Iowa USA EN43
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
How accurate is the time on your computer? If it's not dead on, that can mess with your doppler correction...
73, George, KA3HSW
----- Original Message ----- From: "Mark Johns via AMSAT-BB" amsat-bb@amsat.org To: "AMSAT BB" amsat-bb@amsat.org Sent: Saturday, October 22, 2016 3:32 PM Subject: [amsat-bb] SatPC32 Doppler problem
For some reason, my SatPC32 has stopped correctly compensating for Doppler shift on FO-29. I'm continually having to "find myself" all over the passband, making adjustments throughout the pass, just like the old days when everything was manual.
I've updated the Keps. I marked the uplink and downlink freqs at time of closest approach on a high-elevation pass, and re-edited my Doppler.SQF with those numbers.
SatPC32 is talking to the rig, and it does make regular changes to both uplink and downlink frequencies -- they just happen not to be correct.
I'm stumped! Any thoughts?--
Mark D. Johns, KØMDJ Decorah, Iowa USA EN43
--- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Hello Mark,
Make sure location, time, summer/winter time and time zone are correct.
73 Jan PE0SAT
On 22-10-2016 22:32, Mark Johns via AMSAT-BB wrote:
For some reason, my SatPC32 has stopped correctly compensating for Doppler shift on FO-29. I'm continually having to "find myself" all over the passband, making adjustments throughout the pass, just like the old days when everything was manual.
I've updated the Keps. I marked the uplink and downlink freqs at time of closest approach on a high-elevation pass, and re-edited my Doppler.SQF with those numbers.
SatPC32 is talking to the rig, and it does make regular changes to both uplink and downlink frequencies -- they just happen not to be correct.
I'm stumped! Any thoughts?--
Mark D. Johns, KØMDJ Decorah, Iowa USA EN43
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hello Mark, try the following: Track a FO-29 pass and find your signal using the "Upl. Corr." up/down controls in menu "CAT". Fine tune the uplink for best audio (best around the middle of the pass). Then click the "Change/Store Data File" in menu "CAT" and in the little window that opens click on "Upl. Correction". That will save the correct uplink frequency. That is easier and more reliable than to enter observed frequencies manually in Doppler. SQF.
At the next program start you should immediately hear your signal. Little deviations (100 ... 300 Hz) may remain due to temperature differences at the sat or the radio. You can easily correct them using the ± keys of the numerical pad with a few hits in steps of 100 Hz. (The keys work only if SatPC32 must be the active program - blue header line).
73s, Erich, DK1TB
Am 22.10.2016 um 22:32 schrieb Mark Johns via AMSAT-BB:
For some reason, my SatPC32 has stopped correctly compensating for Doppler shift on FO-29. I'm continually having to "find myself" all over the passband, making adjustments throughout the pass, just like the old days when everything was manual.
I've updated the Keps. I marked the uplink and downlink freqs at time of closest approach on a high-elevation pass, and re-edited my Doppler.SQF with those numbers.
SatPC32 is talking to the rig, and it does make regular changes to both uplink and downlink frequencies -- they just happen not to be correct.
I'm stumped! Any thoughts?--
Mark D. Johns, KØMDJ Decorah, Iowa USA EN43
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent viaAMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings:http://www.amsat.org/mailman/listinfo/amsat-bb
participants (5)
-
Erich Eichmann -
George Henry -
Mark Johns -
PE0SAT | Amateur Radio -
Pedro Converso