Hi Herbert,

Absolutely, the wider the span, the more fun you get experimenting.

A 1Ghz bandwidth is doable with a tuned circuit in the middle of the band,
and some software tricks to calibrate the results and overcome the lack of
linearity. For wider than 1Ghz bandwidth the tuned circuitry becomes very
complex for a reasonable linearity and cost, and you would find easier to
split the wider band in chunks and downconvert higher part of the spectrum
into lower band, and thus reuse the same tuned circuitry. This is what most
full size SA do, have 2 or 3 IF stages to limit the bandwidth you need to
process after some point.

Cheers,
Ariel

On Tue, Jun 28, 2011 at 5:16 PM, Herbert Graf <hkgraf@gmail.com> wrote:

> On Tue, 2011-06-28 at 17:07 +0200, Ariel Rocholl wrote:
> > Hi Herbert,
> >
> > That is more or less what I did for RF Explorer, see
> > http://www.rf-explorer.com . Current versions are limited to narrow ISM
> > bands, but wider band models are coming in a few weeks, including a
> 2.4Ghz
> > and 240-960Mhz.
> >
> > The circuit is published on the "hacker's corner" wiki. You may get som=
e
> > ideas out of it.
>
> Hello Ariel,
>
> neat, thanks!
>
> I've looked at other units that are kinda similar to that. Thing is, I
> don't really want to build something restricted to one band, I'd like
> something that covers a wide range.
>
> TTYL
>
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