I had a Flex SDR here for a while and it has the most beautifully
defined bandscope I've ever seen It makes the ICOM PROs look like trash.
It takes the I and Q signals from the "Tayloe" detector, which is just
wideband audio, and plots a trace on the scope. Of course you are
limited to 20khz but that is plenty. So really, this is a matter for the
software engineers.
N4LQ
-----Original Message-----
From: "Mark Erbaugh" <mark@microenh.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Date: Wed, 23 Feb 2005 10:59:56 -0500
Subject: Re: [TenTec] Pegasus/Jupe Band Scope Questn
> > It makes sense. When the Jupiter does it's own scan, it's much
> > faster. 2 questions:
> >
> > Does the agc not affect the Jupe in standalone mode scanning?
> >
> > Could a firmware change take care of this?
>
> I asked Gary Barbour at TenTec the same questions a while back.
>
> In sweep mode, the Jupiter firmware does bypass the AGC and it would be
> possible to add that mode (AGC off) as a setting for use with external
> sweeps.
>
> However, I'm considering another alternative. There is a mod to the
> Pegasus
> and Jupiter that brings the 12 kHz IF out to the spare jack on the back
> of
> the radio. This IF is normally fed to a computer soundcard where it is
> used
> to decode DRM (digital shortware broadcast) signals. This IF is
> unaffected
> by the digital AGC in the radio (as it is still in the analog stages of
> the
> radio). This signal could be analyzed in the a computer program to
> provide a
> sweep. There would have to be some coordination between the analog
> tuning
> and the signal received, but it should be possible to get a nice sweep
> display. In fact, it should be possible to provide a real time band
> sweep
> of signals adjacent to the current signal, at least those within the
> width
> of the 20 kHz roofing filter.
>
> 73,
> Mark
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|