Bill
You can bang the physical dish up pretty good and not need to worry. The
feedhorn is the most critical unit. Which Dragonwave radio are you using?
Sent via DROID on Verizon Wireless
-----Original message-----
From: Brad Belton <b...@belwave.com>
To: 'WISPA General List' <wireless@wispa.org>
Sent: Fri, Nov 5, 2010 13:38:55 GMT+00:00
Subject: Re: [WISPA] Licensed 11ghz Link Issues, Need Advice
15-20db off typically means cross polarization. Have you double and triple
checked they are both on the same polarity?
Brad
-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Bill Gaylord
Sent: Friday, November 05, 2010 8:13 AM
To: WISPA General List
Subject: [WISPA] Licensed 11ghz Link Issues, Need Advice
I have a Dragonwave link that was performing about 35-40db lower than the
link budget says it should. I sent tower climbers up to repeak the link and
found they did have it on aligned on a horizontal side lobe.
After re-peaking it got better, but is now about 15-20db lower than the link
budget. It is running about a -52 and the budget calls for a -34.
They did peak the vertical axis, but is it possible that even though both
antennas were mounted plum, that they are aligned on a vertical side lobe.
Like I said, they did say they peaked the vertical, but I don't know if they
did a proper sweep on the vertical because it is not a quick to do as on the
horizontal. They are both plum, but the antennas have about 300ft of
vertical separation at 5 miles. Would difference in height put them in into
a vertical side lobe? I am asking because the 30in antenna's had come
slightly damaged, but it appeared to just be where the raydom attached to
the dish. Dragonwave did not think this would cause an issue. I just need
to know if I need to pay for 2 more tower climbs to re-peak the vertical, or
take down the dishes to return them. Thank you in advance for any advice
that can be given here. By the way, it is our first licensed link, so it is
my first experience with anything above 5ghz.
Bill Gaylord, President
COLI Inc.
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