[amsat-bb] Fw: Operating SSB sats

[k6vug at sbcglobal.net]

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 <patrick at wd9ewk.net> wrote:  
 
 Umesh, 

Very nice! Thanks for sharing the video clip. 

73!




Patrick 


      From: "k6vug at sbcglobal.net" <k6vug at sbcglobal.net>
 To: Patrick STODDARD <patrick at wd9ewk.net> 
 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