I wonder if it's electrical. Shortly after our tornado we lost all 4 900 aps at the same time. When I got on site our Coop was across the street working on the lines. The backhaul links were fine. Not saying they caused it necessarily but losing all 4 at the same time on a bright sunny day was curious. The back haul links in other frequencies were fine.
David Hannum wrote: > The first radio went bad on the first antenna. The second and third > radios have gone bad on the second antenna. We'll probably swap the > antenna again this afternoon on this one. > Dave Hannum > New Era Broadband > > > On Thu, Jun 13, 2013 at 10:05 AM, Jason Bailey <[email protected] > <mailto:[email protected]>> wrote: > > That's why I said antenna. It happened frequently after changing > the antenna. > > --- On *Thu, 6/13/13, David Hannum /<[email protected] > <mailto:[email protected]>>/* wrote: > > > From: David Hannum <[email protected] > <mailto:[email protected]>> > > Subject: Re: [WISPA] Strange problem with Canopy 9000APC > To: "WISPA General List" <[email protected] > <mailto:[email protected]>> > Date: Thursday, June 13, 2013, 10:01 AM > > > Moisture is not an issue. Good drip loops on both the antenna > cable and CAT-5 Cables. We actually sealed the entry of the > radio with mastic to be sure. The first radio lasted about 10 > months. When it went, we first swapped antennas, thinking > maybe a lightning strike damaged it (we've had the same effect > on signal from bad antenna). That did nothing to help, so we > next swapped the radio. Signal back. That lasted about four > weeks. Swapped radio again, and signal back. Lasted about 12 > hours this time. > No visible damage to any of the radios. No moisture found > inside. We don't have capability to test in-house. Will send > to SWG or Wireless Units to have them take a look. > Dave Hannum > New Era Broadband > > > On Thu, Jun 13, 2013 at 9:46 AM, Fred Goldstein > <[email protected] > <http://mc/[email protected]>> wrote: > > On 6/13/2013 7:43 AM, David Hannum wrote: > > We're having an issue with a 9000APC that is very > strange. Here is the > > situation. We have a remote water tank (stand pipe 75' > high) that has a > > few homes around it. So, we have a 9000APC and a > connectorized 2450AP > > on the tower, both on Omni's. The antennas are on a > stand almost > > exactly 4' apart. There are six subs on the 900MHz > radio. About a > > month ago, I had an issue where (after about 9 months) > the signal to all > > of the customers just faded out, to the point that only > two subs were > > still good. I swapped the antenna and that did not > help. I swapped the > > radio, and that fixed the problem. Trouble is, it only > lasted about > > three weeks, and the same thing happened again. I > swapped the radio > > again yesterday, and today, I'm back in the same boat. > The radio in the > > AP keeps going out. I had the climbers check the > grounding, and we > > actually ran a dedicated ground yesterday off the water > tank. My knee > > jerk feeling today is that maybe the radios are too > close together, and > > the 2450 is burning up the 900. Could this be the case? > Any ideas? > > Here is an example of what happens. Customers that run > signals -47 to > > -57 become -70 to -75 and those who's signals were -70 > and up fall clear > > off. Swap the radio, and everything goes back to > normal. This is now > > three radios that have gone, each lasting a much shorter > time than the > > previous. (this one did not make it 24 hours). > > I can't completely rule out lightning - the tower is in > a very wooded > > area. But usually you burn up the NIC in that case - > not weaken the radio. > > Thoughts? > > Interesting mystery! Clearly you don't want to blow more > radios this way. > > Any more clues about what may have happened right before > the failures? > I'm wondering about weather events. Did it fail after a > rain storm? > Water coming in to the radio or corroding the antenna > connectors might > result. And if the antenna's connector is flaky, > re-attaching it to a > new radio might be a temporary fix, but reattaching it to > an old radio > might "fix" it too (temporariy). Have you examined the > broken radios in > the shop? > > -- > Fred R. Goldstein fred "at" interisle.net > <http://interisle.net> > Interisle Consulting Group > +1 617 795 2701 > _______________________________________________ > Wireless mailing list > [email protected] <http://mc/[email protected]> > http://lists.wispa.org/mailman/listinfo/wireless > > > > -----Inline Attachment Follows----- > > > _______________________________________________ > Wireless mailing list > [email protected] <http://mc/[email protected]> > http://lists.wispa.org/mailman/listinfo/wireless > > > _______________________________________________ > Wireless mailing list > [email protected] <mailto:[email protected]> > http://lists.wispa.org/mailman/listinfo/wireless > > > > > _______________________________________________ > Wireless mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/wireless _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
