Are these all clear LOS shots with good Fresnel clearance and no multipath? If not, the variation may be normal.
From: Kurt Fankhauser Sent: Friday, January 23, 2015 6:34 PM To: [email protected] Subject: Re: [AFMUG] pmp450 chain signal ratio variation Yea i am running 13.2 on eveything, and yes I know the ones with 20db varition probably have been idle. I have even seen them get full speed linktests while they showed the 20 db difference, i think it was a software glitch on the sessions page. Sent from my iPhone Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110 On Jan 23, 2015, at 7:13 PM, Ken Hohhof <[email protected]> wrote: The ones that are 20 dB difference, I would first run a couple linktests through them to see if some data makes them read right, it might just be cosmetic. I would also makes sure you are on 13.2 (final) FW at both AP and SM. I have experienced strange things with mismatched 450 FW between AP and SM. Also at some point, I forget exactly where, I believe Cambium did something to get the numbers and/or tone alignment to work better on a link with no data flowing. From: Kurt Fankhauser Sent: Friday, January 23, 2015 3:43 PM To: [email protected] Subject: [AFMUG] pmp450 chain signal ratio variation I have a 3.65ghz 450 AP with a 120 degree KPP sector that I suspect I have a significant chain variation between Chain A and Chain B. What is more likely to be the issue? A bad pigtail or a problem with the KPP sector? The AP has been up for 6 months and it has had this problem since day 1 but lately it seems to becoming worse. Most of the subs are only getting about half what they should be getting on the link tests with the exception of some clients that are more towards the center of the sector beam width they are getting about 75% on the linktest. I attached a screenshot of my sessions page with power levels. Any thoughts? I would replace the pigtails first but the weather isn't exactly fit for climbing this particular tower. Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110
