Alberto,
Thanks for the reply. Do you think that having I/Q channels available would have any advantage for QRSS or other LF modes?
--
73 Warren K2ORS/WD2XGJ
FN42hi
http://www.w4dex.com/wd2xgj.htm
-------------- Original message ----------------------
From: Alberto di Bene <[email protected]>
Warren K2ORS/WD2XGJ wrote:
> Hello the list,
>
> A friend of mine is building a hardware converter for his Racal 6830
that will mix the 455kHz i.f. down to 8.44 kHz and provide I/Q outputs. This is
so he can pipe the output into Alberto's SDRADIO program and demodulate the
wideband modes (AM/FM/SSB) in DSP.
>
> A question arises would there be any applications at LF? I'm thinking it
might be useful for PSK type signals but not sure on this one.
>
> Alberto, Wolf, any thoughts on this one?
>
>
> --
> 73 Warren K2ORS/WD2XGJ
Warren,
you can certainly recover the PSK modulated signal using the USB or the LSB
mode of SDRadio.
But then you need a PSK decoder. One possible solution would be to use VAC
(Virtual Audio Cable).
VAC implements virtual sound cards, so, e.g. you can tell SDRadio that the
output sound card
is Virtual Cable Out 1, then you tell to the PSK program of your choice to
accept input from the
Virtual Cable In 1. Using this technique you can reroute the output of a sound
card program to
the input of another sound card program without the need of having two separate
sound cards
in your PC. I have used it and it works. The URL where you can find it is:
http://software.muzychenko.net/eng/vac.html
It is not free though...a single copy will cost you 30 USD. There is also a demo
version, but its
purpose is just to evaluate if VAC would work on your setup before shelling the
money, as after
just a couple of minutes of working, it adds artificial noise to the rerouted
audio...clever guy!
73 Alberto I2PHD
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