[amsat-bb] SatPC32 questions, Part 1

David Rush david at rushtone.com
Fri Jun 23 13:16:44 UTC 2017


SatPC32 is a very powerful program, but many aspects of it are not at 
all intuitive or easy to decipher.  I'll try my best to answer your 
questions.  I'm still working out some kinks in my own setup, but I've 
learned a bit about it in the process.

As far as I know yes, you're limited to satellites A-L regardless of 

I think the up/down arrows to the right of the frequencies must be for 
downlink correction (thus it doesn't change the uplink).

Turning on V+ means that tuning the radio will feed those freqs back to 
SatPC32, rather than just SatPC32 to the radio.  If you're tuning the 
radio's VFO but the computer keeps changing the radio back, then you 
need to turn V+ on.

To save your corrected freqs to Doppler.SQL, open the CAT menu and hit 
"Change/Store Dataf File", then save either the uplink correction or the 
frequencies, or both.  It's my understanding that you want to find the 
right uplink correction and store that instead of the downlink 
correction (although that's a bit more complicated when using a single 817).

Once you have the uplink calibrated, you can tune around the passband 
either by turning on V+ and using the radio's knob, or use the arrow 
keys (and numeric keypad) on the computer's keyboard.

With a single 817, it sets the rig into split mode where it uses VFO A 
for receive and VFO B for transmit.  It cannot tune a VFO that's not 
being displayed, so in order to tune the transmit it's got to switch 
from A (receive VFO) to B (transmit VFO), make the tuning adjustment, 
then switch back to A.  Yes, it's very annoying.  There's also (small?) 
risk of transmitting on the receive VFO, which could toast an external 
preamp if you have one installed.  I solved this problem by using TWO 817s.

73, David, ky7dr

On /20170621/ 21:48, Mark Lunday wrote:
> I have a fully registered version, but I am still limited to 12 satellites?
> When I click on the "V" on the left and make it "V+" so that I can correct the uplink and downlink frequencies, I try to change the frequency using the up and down arrows under the 20, 100, 500, 1k and 5k labels.  But it only changes the downlink.  Why?
> Once I can hear my downlink and I toggle the "V" back to "V-" then how do I save the corrected frequencies to Doppler.SQF
> What if I want to use SatPC32 to tune around the passband and look for other stations?  What are the steps for that?
> I want the Countdown window to attach to the right.  It does that on one computer, but attaches to the left on another.
> I am using my FT817, and have the CAT working.  When listening to FO-29, I try to tune the VFO but it keeps putting me back on the frequency shown in SatPC32.
> Another weird behavior...in CAT control mode, it keeps jumping between uplink and downlink frequencies.  How do I stop this?  Is that the special FT817 configuration I need to use?
> Mark Lunday, WD4ELG
> Greensboro, NC  FM06be
> wd4elg at arrl.net
> http://wd4elg.blogspot.com
> SKCC #16439  FISTS #17972
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