Right, the AP isn't directly at the client, but it says there's only 0.8 db
of loss due to that. It says I lose 7.4 dB due to obstruction (when I have
a 1.4 Fresnel zone) and 6.6 due to statistics.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----- Original Message -----
From: "Brian Webster" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Tuesday, January 01, 2008 3:00 PM
Subject: RE: [WISPA] Radio Mobile
Radio Mobile is not doing a simple free space loss calculation. There will
be a fade margin factored in based on the numbers you use for mode of
variability. If you open the path profile window then do a "view"
"details"
you will get a text window that shows all the calculation details the
program used to derive the numbers. That is the first place to start to
look
for the difference. The other thing you may be seeing is that if you don't
have the antennas aimed directly at each other, in the calculation you
will
be getting the gain from something other than the strongest point in the
pattern.
Thank You,
Brian Webster
www.wirelessmapping.com <http://www.wirelessmapping.com>
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Mike Hammett
Sent: Tuesday, January 01, 2008 12:03 PM
To: WISPA General List
Subject: [WISPA] Radio Mobile
How do I figure out how Radio Mobile arrives at it's signal level? On a 3
km link in 5 GHz, I'm off 15 - 20 db from Eje's power calculator. What
the
radio link window says is really close to the input numbers for Eje's
calculator. Why they're different is that I actually used the right
antenna
files and hard fixed the AP at N, S, E, and W.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
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