Re: LF: Jason Tests / PSK31

[G0MRF@aol.com]

In a message dated 1/22/02 4:14:46 PM GMT Standard Time, j.r.moritz@herts.ac.uk writes:


> BTW, I think I asked before, but don't recall any responses - can anyone 
> recommend PSK31 software that has the TX phase keying signal available as a 
> logic level output? Since my TX will generate BPSK with appropriate 
> envelope shaping I would like to try this mode; but a sound card output 
> would be a bit messy - demodulate the audio signal, recover the phase data, 
> feed into LF TX modulator... a bit of wire would be so much easier!
>
> Cheers, Jim Moritz
> 73 de M0BMU


Hi Jim.

I did try and chase this with some of the PSK31 authors as the SM6LKM/G0MRF DDS has a phase shift input for exactly that application. But in this world of analogue soundcards they thought an output of this type was not required.
It is possible to use some hardware and recover the phase data from the audio envelope, but it's hard work.

Let me know if you have any luck.

David  G0MRF