Had hopes of monitoring some voice transponder activity on a high pass of CAS-4A this evening, but nothing heard.
The telemetry data stream and CW beacon were strong as ever, but nothing around the transponder downlink.
Image of SDR waterfall:
http://www.qsl.net/k/k4kdr//files/2017-07-27--2124--CAS-4A.png
Question: in a case like this where the status of a transponder is unknown and no activity is heard, absent any SSB gear would it be bad to transmit an FM signal on the uplink just to see if the transponder is in fact active? I would never use FM if there was activity, but could an FM transmission cause any harm just to possibly determine the status of a transponder?
Thanks!
-Scott, K4KDR
==========================
On Wed, Jul 26, 2017 at 9:31 PM, christy hunter cchunter3@mindspring.com wrote:
to All, this is to confirm my status report on the website, (in case you think it was a mistake)
on July 27 2017, at about 0047UTC I could hear my downlink, although intermittently, during a pass of CAS-4A (using the published frequencies). The downlink had good audio (loud and clear), and I could only hear a few words of my transmission at a time. I was able to sustain for only a portion of the pass. Using 5Watts into a M2 16 el cross element circular beam. (436CP16). This pass did NOT coincide with any of the XW sats.
73, Christy KB6LTY, DM14