Milla,
It is possible that the first site's emissions take a different path
than the second's, e.g.,
---->
S1 __________________________________ Y
\ \
\ \
\ \
\ \
\ \
\_________________________________\ S2
X <----
At S1 and S2 are your stations. At X and Y are radio reflectors such as
buildings. Say that the S2->S1 path is the weak one. It could be a much
longer path than the S1->S2 path, or it could cross radio attenuators
like trees. Or X might be a worse reflector than Y.
Diffraction and refraction will enter into the picture.
If you cannot explain the problem by path differences, you might try
swapping the cable and antenna at the first site with the second.
Dave
On Sun, Jan 19, 2003 at 06:38:00PM -0800, Milla Yegurku wrote:
> hi
>
> my PTP link has simillar radio, cable, antennae at
> both ends -i am getting -49dBm at one end and only -62
> at the other. where is the difference of 13db gone?
> what are the possible reasons?
> the link is set up in urban environment with very poor
> LOS.
>
> regards
> Mila
>
>
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--
David Young OJC Technologies
[EMAIL PROTECTED] Engineering from the Right Brain
Urbana, IL * (217) 278-3933
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