Explain the roof thing. I've personally done hundreds of satellite and wisp installs on metal roofs. I know wisps that ONLY install on metal roofs.
Use proper lags, proper multi-lag foot pads, a good impact driver, and a butyl based sealant. Have decent insurance. On Dec 20, 2016 2:44 PM, "Ken Hohhof" <af...@kwisp.com> wrote: > In this case it’s 3.65 and at the SM due to using a dish. > > > > Long story behind this install, but it’s a grain elevator where we ran > into problems with the belt housing obstructing one of the 4 APs and we > didn’t get it in before harvest and then January came early and of course > some guy calls wanting an install that should be on the missing sector but > only 13 degrees beyond the 90 degree coverage for the neighboring sector. > So rather than put him on the old 2.4 FSK we used a dish and 3.65 on the > adjacent sector. Oh, and he neglected to mention he had put a metal roof > on his ranch house so the installer had to put the dish lower than I like. > No way we’re lagging through a metal roof unless it’s on a crappy barn. > > > > Bottom line is we’re only getting 4X and I’m trying to speculate what > happens when we get the missing sector up, if it will pop to 8X or still be > poor. It doesn’t sound like too high signal level is the cause of the > problem. There are several other possibilities, I guess we won’t know > until we put up that 4th AP which won’t be until nicer weather. > > > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *George Skorup > *Sent:* Tuesday, December 20, 2016 2:17 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Cambium 450 can signal be too hot? > > > > ...at the cost of somewhat high probability of interfering with the > opposite sector on the same freq. Been there, done that. Note than -52dBm > is the default SM target receive level for SM Tx power control. I usually > try to back this off to -55 or -57. > > And yes, I have short range SMs receiving at -45 to -50dBm. These will > sometimes see the opposite sector. 30+dB of f/b ratio is great, but in this > instance, it's not enough to achieve 256QAM. So you need to be very careful > about what you're doing with customers close to sites. Some of these we've > moved to an omni (yeah I know) at 5.4 dedicated to short range customers. > > On 12/20/2016 1:58 PM, Matt Mangriotis wrote: > > -55 dBm is a perfectly acceptable target level.� In fact, sometimes, > you�ll want to set the target slightly higher (like -52 dBm) to overcome > higher noise levels. > > >
