# Satellite UHF Beacon Decoder

**URL:** <https://www.ruby-forum.com/t/satellite-uhf-beacon-decoder/232670>\
**Category:** GNU Radio\
**Created:** [October 21, 2014, 9:09pm UTC](https://www.ruby-forum.com/t/satellite-uhf-beacon-decoder/232670 "2014-10-21T21:09:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [October 21, 2014, 9:09pm UTC](https://www.ruby-forum.com/t/satellite-uhf-beacon-decoder/232670/1 "2014-10-21T21:09:28Z")

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I am working on creating a cubesat satellite beacon decoder using the  
Ettus B200 SDR.

I think I have a pretty good handle on the signal conditioning and the  
demodulation (see picture of waveform and block diagram). However, for  
some reason I am not able to decode anything. I think that I am going  
about decoding the beacon (AFSK1200) the wrong way. Does anybody have  
any pointers?

Thanks,

Patrick Barone