[amsat-bb] PicSat demodulator?

[Scott]

Despite the documentation, PicSat beacons so far have been 1k2 BPSK.

There is a 1k2 BPSK software modem in:

http://uz7.ho.ua/modem_beta/other-versions.zip

... and the demod on that would be USB.  Of course the bandwidth &
centering of the audio output is critical for this scheme; what works well
for me is to output the audio (I use HDSDR into VB Audio virtual cable) at
4 KHz with the signal centered on the 2000 Hz mark.  If you match that 2000
Hz center on the 1k2 BPSK software modem screen, it decodes very nicely.

-Scott,  K4KDR


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On Wed, Jan 17, 2018 at 11:19 AM, Ken Swaggart <k.swaggart at charter.net>
wrote:

> Have been trying to decode the 435.525 MHz beacons from PicSat without
> success. The modulation is described as "GMSK modulation with G3RUH
> scrambling". I'm assuming the baud rate is 9600.  Normally I use UZ7HO's
> High-Speed SoundModem for telemetry reception.
>
> Tnx,
> Ken, W7KKE