[amsat-bb] SSTV on Linears

[John Kludt]

Roy,

Have you checked this out with the control ops?  I don't know but are there
any duty cycle issues to worry about?  And given that a linear transponder
has a finite power budget what does it do to the other users?  Maybe not a
big deal but I wonder if the sys ops for these birds have any words of
wisdom for us before we all start cranking up MMSSTV and banging away.

John

On Tue, Dec 31, 2019 at 11:14 AM Roy Dean via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> >
> > I did some SSTV years ago via AO-40. Really fun. But with a LEO
> > satellite, you will need to be actively adjusting for Doppler shift in
> > real time, as SSTV is frequency sensitive. You might try some of the
> > faster modes, especially since a pass is over in just a few minutes. Greg
> > KO6TH
>
>
> I just did a dry run with my station, and think I'm ready to try an actual
> pass.   I will be operating in "Robot36" mode on CAS-4B (17:00z) and CAS-4A
> (17:30z) this afternoon as  first attempt.   I plan on shooting for the
> lower portion of the 2m passband (going to target the lowest published
> downlink frequency).  I will likely announce several times prior to first
> transmitting to fine tune.   My test image is very simple black and white
> call/grid.   If anybody hears it, please feel free to respond with an image
> (short notice, I know), or voice.   If you don't hear me, then something
> came up to pull me away from my computer or I simply can't get in.
>
> --Roy
> K3RLD
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