[amsat-bb] AO-73 Telemetry Question

David Palmer KB5WIA kb5wia at amsat.org
Wed Aug 13 15:01:47 UTC 2014

>>  It appears the signal is making it to the Dashboard but nothing
>> seems to happen.

Hi Tom -- just checking real quick, from your pic, it shows that the
actual data stream from the sat is being picked up in the FCD
dashboard, but the signals are right up against the zero line on the
left, and looks like some of the signal might have been clipped off to
the left.  To confirm, you also tried with the main signal somewhere
in the middle of the FCD Dashboard's "passband"?

(sorry, I run my FCDPP direct to the FCD Dashboard, so I'm just used
to seeing the sat signal display around 55,000 on a scale of 0-96,000
Hz, so not entirely familiar with running the sigs through HDSDR
recording first)

73!  Dave KB5WIA

On Tue, Aug 12, 2014 at 2:18 PM, Thomas Doyle <tomdoyle1948 at gmail.com> wrote:
> Hi,
> Recorded an AO-73 telemetry pass (RF recording)  this morning with HDSDR.
> Later fed it from HDSDR into the sound card and then to the FCD Dashboard
> (see pic). It appears the signal is making it to the Dashboard but nothing
> seems to happen. I tired (Auto Tune) on/off, and narrowing the bandwidth of
> the HDSDR filter to better match the bw of the signal but still nothing. It
> does seem to lock on to the (Detected Frequency 2262 Hz) but that's about
> all it does. The Dashboard is brilliant and I would like to get it working.
> Due to deed restrictions no outside antennas are allowed so the signal is
> not that strong here (about 5dB above the noise) and it might never work
> from here. Any suggestions will be appreciated. Any suggestions that we
> move to a new neighborhood that allows outside antennas will be forwarded
> to my wife :-)
> http://www.tomdoyle.org/dashboard1sm.png
> Tnx W9KE Tom Doyle
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