Sounds like a side lobe...we had the same issue...link was coming in at -70...link budget said -50...finally got it out of the side lobe and within 1-2 dB of the link path.
Regards, Chuck On Fri, Nov 5, 2010 at 9:12 AM, Bill Gaylord <bi...@torchlake.com> wrote: > 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. > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
