K7TAB was operating without computer control, so its not surprising you'd have to chase him a bit.
73,
Paul, N8HM
On Fri, Feb 8, 2019 at 4:14 PM [email protected] [email protected] wrote:
Thanks Patrick.
Not to spam the BB, but here is one last clip - working K7TAB via CAS-4B this morning.
https://drive.google.com/open?id=1DYbg1Ua8_MfZnBjpngBjGxAApB5fcq82 I use the CW beacon to wait for adequate signal and then (at 00:40) switch to the transponder pair, adjusting the uplink with a tone burst until it comes in at about 800 Hz on the bottom display. After that I can move the down-link around the pass-band and don't have to worry about the uplink. HRD (and SatPC32) do a great job of handling the Doppler adjustments.
Obviously, you'll notice the signal from the CAS-4B ges pretty strong as soon as it comes up above 15 degrees or so. I keep an eye on the CW beacon (at the left of the waterfall) throughout the pass and watch-out for fading due to foliage, buildings etc.
Fast forward to 3:20, I've tuned to K7TAB and start responding.
You'll notice that K7TAB drifts a little as he is speaking. However, you'll also notice that K7TAB has moved quite a lot AFTER I have responded and so I have to re-tune the down-link to hear the response properly. Well, that is the issue I wish to illustrate, and am still working on it.... :)
Again, sorry for several posts, won't post any more until I have figured it out. Have a great weekend.
73!Umesh, k6vug
On Thursday, February 7, 2019, 8:52:05 PM PST, Patrick STODDARD <[email protected]> wrote:Umesh,
Very nice! Thanks for sharing the video clip.
73!
Patrick
From: "[email protected]" <[email protected]>To: Patrick STODDARD [email protected] Sent: Thursday, February 7, 2019 11:26 PM Subject: Re: [amsat-bb] Operating SSB sats
Hi Patrick, About the RTL-SDR, I just wanted to share a short clip I recorded capturing CAS-4A CW beacon with HRD handling the Doppler tracking.
https://drive.google.com/open?id=1UCrYTb74ZnVG2Xc3FWlF7YImFasjwCKz
73!Umesh
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