If you are into this kind of thing then you need to
check out the SDR-1000 at:
http://www.flex-radio.com/
You will find that it does all of the things you seek.
Be sure to read the theory of its operation,
particularly the direct conversion/sampling "detector"
design that it uses. It is a very intriguing and
clever approach to getting the I/Q signals simply and
inexpensively. And to also do it with NO non-linear
devices in the receive signal path, .... hmmmm - I
wonder what that can do for improving IMD??? However I
would really like to see it put through the standard
ARRL RX tests just to see what its limitations are as
I'm sure there are some.
Now only if a company like Ten Tec would further
commercialize its basic design approach by building
its low level RF components onto a PCI card along with
the A to D conversion process (instead of using a
sound card for that part). Then the dream of an
Ethernet based radio would be much closer to reality
sooner rather than later. Just let a dedicated
$500/2GHz host PC handle all of that Ethernet overhead
work.
Needless to say I'm following the SDR-1000's
development closely, once there is software available
for it that is capable of doing some of the things
that I really want to do I'll probably add one to my
shack. If it proves that it can do those things
effectively then who knows what that will lead to...
Duane
N9DG
--- Bill Fuqua <wlfuqu00@uky.edu> wrote:
> I think they could make a relatively simple kit with
> the local oscillators,
> mixers, IF and filters (45MHz and 455KHz). Take out
> the extras like AGC (
> use attenuators), and the HI-Z input. This would be
> a very simple kit
> allowing a beginner to learn how radio works and use
> his computer for the
> IF processing and audio. look at
> http://www.detomasi.it/en/project.html.
>
> The only thing needed to make the above program work
> with the RX320 is to
> have adjustable IF frequency to resolve the last few
> digits of tuning. The
> IF frequency is definable but in the initiation
> file.
>
> Another possibility is to make an RF generator using
> the same above
> components. Up converting from the DSP IF to 45MHz
> and then down to the
> desired RF frequency. Between the two you could
> make a very good HF
> spectrum analyzer w/ tracking generator to help you
> develop you own
> receiver projects.
>
> 73
> Bill wa4lav
>
>
> At 05:16 PM 6/10/2003 -0400, you wrote:
> >I bet they could. I would love to buy one !!!
> >
> >
> >73 de Gary, AA2IZ
> >
> >
> >----- Original Message -----
> >From: "Bill Fuqua" <wlfuqu00@UKY.EDU>
> >To: <tentec@contesting.com>
> >Sent: Monday, June 09, 2003 2:50 PM
> >Subject: Re: [TenTec] great RX320 review
> >
> >
> > > I wonder if Ten Tec could produce a RX320 with
> IF output only to send to
> > > sound card and not have the DSP stuff and audio
> for
> > > much less than the RX320. PC DSP IF is practical
> now up to 15 or 20 KHz.
> > >
> > > 73
> > > Bill wa4lav
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