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. ---------------------------------------------------------------------------- ---- 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/