Hi Peter -

I have switched modules. The manufacturer is impossible to get to
in any way. I am right now programming a manchester
coder/decoder/packet modem for 16F876. With the new module
the price is the same including the PIC.

Kent
> > 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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>

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