Archived from groups: alt.internet.wireless (
More info?)
On Fri, 17 Sep 2004 09:18:30 +0200, Anders Gjendemsjø
<gjendems@iet.ntnu.no__NOSPAM> wrote:
>I want to take a look at some simple factors that may have an
>impact on the received signal to noise ratio for a 802.11 STA.
All 802.11 managment frames send the signal strength and signal to
noise ratio, without encryption. You can sniff these with the vendor
supplied "site survey" tools, or by using a 3rd computah running a
sniffer such as Netstumbler.
>I'm looking for a shareware / freeware program that analyses the signal
>strength and that provides statistics and plots.
None of them do any analysis or interpretation of results.
Netstumbler will do logging and generate interesting graphs. Reading
between the lines, my guess is what you want is some kind of data
logger to record signal strength and S/N ratio, and a seperate
graphing program to make pretty pictures and charts. I do this with
an access point that has SNMP capablities (Cisco, Orinico, Proxim) and
use MRTG:
http://www.mrtg.org
http://people.ee.ethz.ch/~oetiker/webtools/mrtg/links.html
to display the historical graphs. Mostly, I use it for traffic
analysis, but anything that belches integers can be plotted with MRTG.
More drivel found by Google:
http://openfire.coloradocollege.edu/mrtg/wireless.html
http://ap-utils.polesye.net
--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558
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