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rs1729 avatar rs1729 commented on June 25, 2024

2400 baud is the symbol rate (the bit rate due to Manchester coding would be 1200 bit/s), the symbol rate is what matters.
I didn't check the exact modulation index, but decoding was best with index h=2.0. The spectrum shape also suggests something like that. The two frequency peaks seem to be 4.8kHz apart (see below video, Manchester coding usually shows these dominant frequencies). There is not much pulse shaping.
Here is a short video of a rather weak signal:
https://www.youtube.com/watch?v=oNkX_u5NN4E
With option --IQ it decoded best with IF lowpass bandwidth 8..9 kHz (option --lp bandwidth is set to 9kHz). Same with FM-demodulation like in the video.

from rs.

flux242 avatar flux242 commented on June 25, 2024

ok, I've tested the decoder using that video

from rs.

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