FYI - Amazing ! Multispsk with SDR 48 Khz RS ID

Bill V WA7NWP wa7nwp at
Sun Feb 14 22:32:00 PST 2010

Steadily the new SDR technology is opening up how we do things.   But
.. as was recently mentioned by another .. is there really anything
new and different being done?  Where's the wide data?

Bill - WA7NWP

---------- Forwarded message ----------
From: Andy obrien <k3ukandy at>
Date: Sat, Feb 13, 2010 at 9:56 AM
Subject: [digitalradio] Amazing ! Multispsk with SDR 48 Khz RS ID

While I am not to first to test this, I am happy to have MY first
success with Multipsk, an SDR, and RS ID. Patrick should get a Nobel
prize for this, it will make digital mode hunting even better .

It works as advertised. Phil KA1GMN and I did a test. I placed my
received on 18090 and Phil sent an RS ID (he was CQing) on 18100 As
you will see in , the wider (48
khz wide) Multipsk detected his RS ID , sent an audible "beep" to my
PC , and alerted me visually that an RS ID was detected up 10 kHz.
This could be very useful for bands like 20M where there is quite a
wide range of frequencies for the digital modes (14065 to 14109).

I finally did this by stealing my son's PC , just to test. My Pentium
2.3 single core CPU would not handle the load, but my son's Pentium
single core 2.7 CPU did so, easily. See for system info.

Thank you Patrick. At the moment, Multipsk is the only application
that lets you feed wide I/Q data to it so that you can decode signals
wider than the normal audio bandwidth,

Andy K3UK


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