Unable to even call cq on CAS-6
Hi, during last pass over Europe of CAS-6 (2020-06-21 ~20:30Z) I've experienced the problem already reported here few days ago: even with 10-15W EIRP after a couple of seconds in TX trasponder cut off my signal. I'm quite sure to be not over beacon level. The beacon appares unmodulated. Heard few station calling but get only part of callsign for the same problem.
73, Lapo IK5NAX
Here is a screen shot of my RX waterfall showing the pattern of CAS-6's downlink... it's a challenge to say the least, but at least if you know the pattern it's possible to TX at just the right time.
https://twitter.com/scott23192/status/1274537862843826176
... I have to confess that if this pattern of extremely brief operational windows continues, I'm going to be awfully tempted to see if anyone would like to try some satellite MSK144. But I know it's early and hopefully the situation will improve for voice comms.
-Scott, K4KDR
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On Sun, Jun 21, 2020 at 5:12 PM Lapo Pieri via AMSAT-BB amsat-bb@amsat.org wrote:
Hi, during last pass over Europe of CAS-6 (2020-06-21 ~20:30Z) I've experienced the problem already reported here few days ago: even with 10-15W EIRP after a couple of seconds in TX trasponder cut off my signal. I'm quite sure to be not over beacon level. The beacon appares unmodulated. Heard few station calling but get only part of callsign for the same problem.
73, Lapo IK5NAX
Hi, 17:23 Sun 21 Jun 20 , Scott via AMSAT-BB wrote:
Here is a screen shot of my RX waterfall showing the pattern of CAS-6's downlink... it's a challenge to say the least, but at least if you know the pattern it's possible to TX at just the right time.
Hmmm... very difficult to use.
But is it due to excess of our tx power or is just a mulfunction?
... I have to confess that if this pattern of extremely brief operational windows continues, I'm going to be awfully tempted to see if anyone would like to try some satellite MSK144.
Really I don't figure out HOW dopller matter for MSK144
Lapo, IK5NAX
participants (2)
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Lapo Pieri -
Scott