[amsat-bb] Decoding 9600 Baud Satellites With Yaesu 991a

Tony dxdx at optonline.net
Thu Apr 6 18:17:04 UTC 2017


My Yaesu FT-991a seems to have difficulty decoding certain 9600 baud 
satellites. I've been able to decode GO-32 KISS frames, but have not 
been able to decode other birds such as LO-74 which tend to transmit 
shorter bursts compared to GO-32.

I'm not sure if this can be attributed to the course Doppler tuning that 
occurs when using HRD's Satellite Tracking program or possibly a modem 
parameter that needs to be set.

I've used UZ7HO's Soundmodem as well as an SCS PTC-III and oddly enough, 
the SCS modem decodes GO-32 without a problem, but I haven't been able 
to do so with the Soundmodem.

Any ideas? Thanks

Tony -K2MO

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