- Original Message -
From: "Marlon K. Schafer (509) 982-2181" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Friday, December 08, 2006 9:22 PM
Subject: Re: [WISPA] using diversity outdoors
> First, if you think it's multipath try moving the antenna. I've had some
as
> low as 2' above the ground to get the best signal and speeds possible.
I've
> had a couple, maybe even a few, where moving 2 to 3 feet up or down (often
> down) seems to do the trick.
We tried moving the antenna. It didn't have much effect. We tried up and
down and even a little side to side... didn't mean much.
I HAVE had moving the antenna just a foot upwards change an unworkable link
to a rock solid stable one. Seemed it was a roof reflection, with the
antenna at the peak of the roof.
>
> As for running diversity, it'll be a trial and error thing. Two things
seem
> to happen with multipath. You could be getting a signal out of phase or
> polarity shifted. Or both.
Well, that much I assumed.
>
> If you try it you'll want the antennas 3 to 10 feet vertically separated.
> You'll have to try and see if the same or cross polarity is the key for
your
> customer.
What about horizontally? All our sites are hpol.
>
> I've found that multipath seems to be really really rare in the wild.
> Usually it's something else.
Well, viewed from the customer end, we're going over one house, between two,
and just over a well-travelled road.
While most customers are generally rock-steady with signal moving perhaps a
db or two now and then, this one's about 10 db weaker than it should be and
fluctuates constantly 2-4 db.
It was improved by moving the antenna upwards 18 inches, but it's still not
stable, and more vertical height is probably not in the cards.
>
> Marlon
> (509) 982-2181 Equipment sales
> (408) 907-6910 (Vonage)Consulting services
> 42846865 (icq)And I run my own wisp!
> 64.146.146.12 (net meeting)
> www.odessaoffice.com/wireless
> www.odessaoffice.com/marlon/cam
>
>
>
> ----- Original Message -
> From: "Mark Koskenmaki" <[EMAIL PROTECTED]>
> To: "WISPA General List"
> Sent: Friday, December 08, 2006 9:00 PM
> Subject: [WISPA] using diversity outdoors
>
>
> > What would be the advantage (if any) to using two antennas on the client
> > in,
> > connected to a CM9 and running in 'diversity' mode, where both antennas
> > point to the same AP?
> >
> > I have had one client that seems to have some ugly multipath issues, and
> > rather unstable signal levels and poor stability concerning pings.
> >
> > Is there any rules to follow, if I try two antennas?
> >
> > Thanks
> >
> >
> >
> > +++
> > neofast.net - fast internet for North East Oregon and South East
> > Washington
> > email me at mark at neofast dot net
> > 541-969-8200
> > Direct commercial inquiries to purchasing at neofast dot net
> >
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