Marlon I do not disagree with your assessment but the original
installation was a 30ft mast sitting on the roof of the garage and
strapped to the eve of the second story roof. This put a 19db radio 20
ft above the roof, given the signal, -80~ and the retries a figured it
was shooting through the mass of oak trees. I added 10ft to the mast and
to 19db radio went to -56~ so I swapped the radio to a 15db version.
This is a 2.7 Mile link. It is going to be rather hard to move.

Mark McElvy


-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Marlon K. Schafer
Sent: Friday, October 16, 2009 8:45 AM
To: WISPA General List
Subject: Re: [WISPA] New install driving me crazy....

Is that a bigger or smaller antenna size than what you have now?

If you moved up by 10' and increased your signal levels, what 1000% or
so, 
I'd REALLY say that this is looking like a multipath issue.

Often with multipath I've seen the signals hold well but performance
suck. 
It'll sometimes kill the signal though.

I had one install that has some power lines in the way.  Fought
intermittent 
outages etc. for over a year.  His signal was OK, but not great.
Finally 
something changes a bit and his signal dropped too low.

Hmmm, bad radio.  So I pulled his radio out and put in a brand new one, 
still crappy signal.

Double hmmmmm

I put the old radio back in, left it off the mount and moved it around
to 
see what would happen.  (I always leave 6 to 10' of cable on the mount
just 
for things like this.)

Triple hmmmmm

Move the radio to the west 6' and DOWN 2' and he's got great signal,
faster 
speeds than ever and is happy as a clam.  Now one of my biggest PITA 
customers just never calls anymore.  It was a very amazing
transformation to 
his service.

Again, there were some powerlines *close* to the path but not in it.
Things 
actually looked pretty good to me.  But not to the radio.

Your symptoms look like multipath to me.  We don't see it's effect very 
often, the systems handle it quite well today.  But when it hits it can
hit 
hard.

laters,
marlon

----- Original Message ----- 
From: "Mark McElvy" <mmce...@accubak.com>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, October 16, 2009 4:50 AM
Subject: Re: [WISPA] New install driving me crazy....


> Well before moving to the current setup, I originally had a CPQ-19, 10
> ft lower. It had a -80 with the same result and I was seeing a lot of
> retries.
>
> -----Original Message-----
> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
On
> Behalf Of Marlon K. Schafer
> Sent: Thursday, October 15, 2009 9:30 PM
> To: WISPA General List
> Subject: Re: [WISPA] New install driving me crazy....
>
> Change from b to g or g to be mode.
>
> Turn your power WAY down.  That's way too hot of a signal.
>
> Any metal, trees, houses, power lines etc. anywhere near the signal
> path?
>
> This looks a LOT like multipath.
> marlon
>
> ----- Original Message ----- 
> From: "Mark McElvy" <mmce...@accubak.com>
> To: "WISPA General List" <wireless@wispa.org>
> Sent: Thursday, October 15, 2009 2:30 PM
> Subject: [WISPA] New install driving me crazy....
>
>
>> Installing a new customer, Tranzeo CPQ-19 to a MT AP, -60 signal
> up/dn,
>> -102 noise. About half the time I don't get name resolution and can't
>> browse pages. This happens with two different radios. It is kind of
>> acting like I am loosing routing or something. I also notice I will
> get
>> very high ping times sporadically along with drop pings. Best of my
>> knowledge no one else having issue on this AP, about a dozen users.
>>
>>
>>
>> Mark McElvy
>> AccuBak Data Systems, Inc.
>>
>>
>>
>>
>>
>>
>>
>>
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