Question about tuning for doppler and SatPC32
Hello all.
I was on one of the early apsses of FO-29 this morning and was having a QSO with another ham about which frequency to tune for doppler. Both of us went LOS without comming to a mutual agreement on this.
This question has been asked before, I'm sure, but I thought that I would ask it again.
My thinking, and the way that i have set things up is that I have SatPC32 tunining the higher frequency doppler only. I don't tune the lower frequency at all. In the case of FO-29, I only tune the downlink freq (UHF. I do leave the TX freq alone. Is this correct?
SatPC32 seems to do a great job tuning along with most stations but my question to the group is that when you are on a satellite such as VO-52 which has the pair reversed, do you continue to tune the higher frequency (uplink) or do you tune the lower frequency (downlink).
What is the preferred decorum?
Also, for those SatPC32 users....
When you set the program up to tune either the uplink or the downlink doppler, is this a global setting that applies to all of the satellites that you have in your list or are the settings unique for each bird?
Thanks, Peter VA3PK
On 17 Nov 2006 at 8:52, pgayle@porchlight.ca wrote:
Hello all.
I was on one of the early apsses of FO-29 this morning and was having a QSO with another ham about which frequency to tune for doppler. Both of us went LOS without comming to a mutual agreement on this.
This question has been asked before, I'm sure, but I thought that I would ask it again.
Exactly and at numerous time but there was no consensus or agreement on that matter. Even if you tune both the uplink and the downlink automatically you ended up with some manual correction at some point in the pass and you should have your other party correcting both ways also and all the other users on the transponder (read nearly impossible to achieve).
What i found here is to try to tune the downlink only don't touch your uplink at all. I know it's not perfect but it is manageable and even if again we can not expect all of us to use the same method it is a lesser problem then trying to run after each other .
Again it is what i found to be my best way to compensate for doppler shifting but when you enter into a QSO with a station who track both side it is a mess and i was rarely able to complete a QSO as i loose it on the transponder. Let say there is some very bad combination .
"-" The medium is the message...The content is the audience...;)
Luc Leblanc VE2DWE WAC basic,CW,Phone,Satellite Skype VE2DWE www.qsl.net/ve2dwe
Not being all that familiar with SatPC32 (yes, I'm one of those dreaded Mac users) does it have the ability to do full doppler correction (both uplink and downlink frequencies at the same time)?
It would seem to me that full doppler correction would be preferable, since the QSO would seem to remain "stationary" with respect to the transponder passband edges.
73,
John AA2BN AMSAT #22683
participants (3)
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John Zaruba Jr -
Luc Leblanc VE2DWE -
pgayleï¼ porchlight.ca