[amsat-bb] Problem with SatPC32 Doppler Frequency Control

Bernie and Cheryl hamdan at ix.netcom.com
Tue Jan 7 17:41:51 UTC 2020


Dear Folks:

I can't get Doppler correction to work on my SatPC32 program /for most 
of the satellites./  Let me be clear that, for SO-50, my Doppler 
frequency correction works just fine.  That tells me that the hardware, 
and some of the software, is set up properly.

Here's the difference that I see.  On the top of the SatPC32 screen, 
there is a section that shows "Downlink" and "Uplink" frequencies, right 
next to the portion where the pushbuttons exist to shift frequencies by 
20khz, etc.  When I bring up SO-50 on SatPC32, the box below the 
"Downlink" and "Uplink" sections is populated with the actual 
frequencies, and they change during the course of a pass.  On the other 
satellites, that box is a complete blank.  What do I need to do to get 
the data to populate in that box, since I suspect that's what needs to 
happen in order for Doppler correction to occur?

Thanks and 73 de Bernie, KF0QS



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