....or even an Si5351, since harmonics don't matter in this application (I
think...).
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-------- Original message --------
From: Joe Rocci <joe@xxxxxxxxxx>
Date: 8/29/2015 3:00 PM (GMT-05:00)
To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: A homebrew spectrum analyzer
Given the resolution of the instrument, all that mght be necessary is a cheapo
DDS module swept at the analyzer input frequency by the Arduino program that
controls the Si570.
Joe
Sent from my Galaxy Tab4 10.1 4G LTE Tablet
-------- Original message --------
From: allison <ajp166@xxxxxxxxxxx>
Date: 8/29/2015 2:29 PM (GMT-05:00)
To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: A homebrew spectrum analyzer
Farhan,
One suggestion:
Add tracking generator (difference of first osc and second, filter and
pump up with amp)
as then it adds sweeperino capability another useful function in one
instrument. It adds
little to the complexity but adds huge functionality.
One comment. Shielded modules, dead bug or PC are a must to get the
best result.
Allison
On 08/28/2015 01:01 AM, Ashhar Farhan wrote:
While working on the Minima project, I needed a spectrum analyzer to
measure the performance. The new specan is as complicated as a simple
SSB rig, probably even simpler.
This is an Si570/Arduino controlled spectrum analyzer that can be
built for less than hundred dollars. It is simple to build and it can
be used to measure IMDR, spurs, harmonics, etc. It doesn't need an
oscilloscope.
I like you all to read about
it http://hfsignals.blogspot.in/p/specan-reboot-of-w7zoi.html
- f
