> I have tried that one.
> after 3 1/0 in a row bits the receiver outputs something like a
> 20kHz square. (Most noise filtered in a 2-20kHz bandpass and
> squared)

This sounds like you receiver is really aggressive. Is there a way to talk
to the makers or identify the slicer memory cap on the module and add
something to it ? Is there perhaps an output with un-sliced Rx data
(rectified/detected but not sliced) ? I was lucky enough to have one of
those with my last Radio based project and it helped.

The only way I see for you to make it work without HW is to employ one of
the bit-stuffing schemes used for MFM/RLL recording and lower the
effective data rate like this. Or use a FEC/ECC table and send 6 data bits
in a byte + 2 bits ECC. Ideally speaking I think that your bandwidth
effectively cuts off 10% from the max. speed with that baud rate. Since it
is presumably specified at 6dB it actually cuts more I think.

Is there no way you can go synchronous with FM or something like that ?

Peter

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