I have used the sdr-iq receiver (http://www.rfspace.com/RFSPACE/SDR-IQ.html)
for rfi and analysis of grow lamp noise. it only goes to about 190khz
bandwidth but is quite usable and has a wide range of pre-amp and attenuator
settings built in. it also doesn't require any external power, just the usb
power which makes it handy to use with a laptop. see some of my spectrum
screen shots at:
http://wiki.k1ttt.net/(X(1)S(qfsrcu55xitt4n45g2sitifz))/2012%20Maintenance%20and%20Upgrade%20Blog.ashx#160mrfi
(keep scrolling to the end of the page as some other stuff is intermixed).
Sep 25, 2014 01:09:54 PM, mstangelo@comcast.net wrote:
If you're interested in this Spectrum Analyzer you can check a review on
Kenneth Wyatt's EDN Blog:
While interesting he prefered TTI or Rigol Spectrun Analysers.
Ken is an EMC Consultant who has excellent as well a practical application
notes and reviews on the blog as well as his website:
Here is his report on a visit to ARRL Headquarters. Note that they discuss
interference from the grow lights:
If you want to experiment with a USB Spectrum Analyzer I'd get one of these $20
DVB-T USB receiver sticks:
and use it with the free evaluation version of Touchstone software:
The DVB-T doesn't cover HF, the rtl2832 starts at 24Mhx, but the price is right.
There is lot's of good information on Ken's site.
Mike N2MS
----- Original Message -----
From: Paul Christensen
To: RFI Mailing List
Sent: Thu, 25 Sep 2014 12:41:16 -0000 (UTC)
Subject: Re: [RFI] USB Spectrum Analyzer
Gary,
I think -110 dBm sensitivity is marginal for RFI detective work, especially
while working with low gain loops when trying to localize switch-mode
interference. Some of the loop preamps I've used produce much more
gain/noise than signal. For the money, I would look at one of the new,
compact SDR receivers that contain a basic spectrum analyzer function.
These will measure a -140 dBm noise floor. Of course, you don't have the
ability to change resolution bandwidth as one would have with a true
spectrum analyzer but that's perfectly adequate for RFI work.
Paul, W9AC
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|