That’s a good point, I have seen links come up and work with one end being polarized wrong. You have to be extreeeeeeeeemly accurate in the polarization rotation to maximize xpol rejection. Just having the dishes off by a tenth of a degree in polarization can reduce x pol from 50 db to 20 db. And if you are 20 dB down you could be cross polarized.
The xpol graph is very very narrow and deep. From: Jaime Solorza Sent: Saturday, April 02, 2016 9:17 AM To: Animal Farm Subject: Re: [AFMUG] How long to Aim? Any luck On Apr 1, 2016 6:01 PM, "Ken Hohhof" <[email protected]> wrote: How close are you to calculated? And are they aligning both ends simultaneously? Something is not right. Either someone is being anal about getting the last half dB, or they're on a sidelobe, or have the polarization wrong, or you don't have LOS. If they are tens of dB off, probably sidelobe. Get them to sweep a wider arc, also use a voltmeter on the BNC connector rather than calling out numbers. -----Original Message----- From: Sterling Jacobson Sent: Friday, April 01, 2016 6:51 PM To: '[email protected]' Subject: [AFMUG] How long to Aim? How long does it take three people to aim a 10 mile 11Ghz link with 3' dishes? I don't know, it's still going on over three hours now...
