Did u make sure they linked up in lab first? Jaime Solorza On Dec 12, 2014 7:08 PM, "That One Guy via Af" <[email protected]> wrote:
> the ground is frozen, pretty much all tilled farmland. Is it possible im > seeing some sort of multipath type madness that this thing just wouldnt not > link up. Ive had a harder time pointing shorter 5ghz links > > On Fri, Dec 12, 2014 at 7:22 PM, Jaime Solorza via Af <[email protected]> > wrote: >> >> Slow and easy...slow and easy... >> >> Jaime Solorza >> On Dec 12, 2014 11:43 AM, "That One Guy via Af" <[email protected]> wrote: >> >>> madness we are a little better than the target after fine alignment. at >>> one point we had the 4' side pinting to the ground abot 100 yards out ant >>> it still had about a -80 on the bnc readout >>> >>> On Fri, Dec 12, 2014 at 11:36 AM, Ken Hohhof via Af <[email protected]> >>> wrote: >>> >>>> Yeah, it was so considerate of AT&T to leave that dish up there when >>>> they sold off the site, only needed to be re-aimed about 2 degrees to go >>>> where we wanted. And they built a platform to stand on while aiming it, >>>> that was awfully nice of them. And they left the flexible waveguide down >>>> to the shelter. I’d really hate to think about hanging a new 12 ft dish >>>> ourselves and running waveguide to it. And it’s an Andrew parabolic, not >>>> the old WE horns, so we don’t have to worry about water getting into the >>>> waveguide and freezing. It doesn’t even look like anyone has been using >>>> the lightning bolt logo for target practice. Life is good when someone >>>> abandons nice stuff you can use. >>>> >>>> >>>> *From:* Hardy, Tim via Af <[email protected]> >>>> *Sent:* Friday, December 12, 2014 11:18 AM >>>> *To:* [email protected] >>>> *Subject:* Re: [AFMUG] aligning bigger antennas on short paths >>>> >>>> >>>> HPBW for a 12 ft dish at 11.2 GHz is 0.5 degree. >>>> >>>> >>>> >>>> *From:* Af [mailto:[email protected]] *On Behalf Of *Ken Hohhof via >>>> Af >>>> *Sent:* Friday, December 12, 2014 11:17 AM >>>> *To:* [email protected] >>>> *Subject:* Re: [AFMUG] aligning bigger antennas on short paths >>>> >>>> >>>> >>>> Nope, a 4 ft dish in 11 GHz should be pretty narrow, a few degrees and >>>> you should be into a deep, deep null. Take a look at the beamwidth or >>>> pattern for your antenna. It should be similar to an 8 ft dish in 5.x GHz. >>>> >>>> >>>> >>>> We once used an existing 12 ft dish for an 11 GHz link and I kept >>>> having to tell the tower guy he was not going to be able to eyeball it. >>>> The beamwidth was something like 1 degree if I remember right. He ketp >>>> getting nada for signal until I made him slowly sweep the azimuth. >>>> >>>> >>>> >>>> >>>> >>>> *From:* That One Guy via Af <[email protected]> >>>> >>>> *Sent:* Friday, December 12, 2014 9:50 AM >>>> >>>> *To:* [email protected] >>>> >>>> *Subject:* [AFMUG] aligning bigger antennas on short paths >>>> >>>> >>>> >>>> Weve never gone above 2' >>>> >>>> we finished installing our 11ghz link yesterday and had the antennas >>>> rough aligned, one side is 3' one side is 4'. I expected the tighter >>>> patterns would make it harder to find the initial link but they actually >>>> linked up right off the bat and it was right on the projected power levels. >>>> >>>> This is only 10 miles, so we have visual on the path. >>>> >>>> We did a little rough alignment yesterday, and will do the fine >>>> alignment today. when we we roughing it there was a good amount of travel >>>> on the antenna (4') side we were on and only a couple db change. do larger >>>> antennas on such a short path give you a little more leniency in alignment >>>> or something? we will do full horizontal and vertical panning today to make >>>> sure we arent in side lobes, just curious is there is more slop in this >>>> scenario. >>>> >>>> >>>> >>>> -- >>>> >>>> All parts should go together without forcing. You must remember that >>>> the parts you are reassembling were disassembled by you. Therefore, if you >>>> can't get them together again, there must be a reason. By all means, do not >>>> use a hammer. -- IBM maintenance manual, 1925 >>>> >>> >>> >>> -- >>> All parts should go together without forcing. You must remember that the >>> parts you are reassembling were disassembled by you. Therefore, if you >>> can't get them together again, there must be a reason. By all means, do not >>> use a hammer. -- IBM maintenance manual, 1925 >>> >> > > -- > All parts should go together without forcing. You must remember that the > parts you are reassembling were disassembled by you. Therefore, if you > can't get them together again, there must be a reason. By all means, do not > use a hammer. -- IBM maintenance manual, 1925 >
