900mhz is a good solution to get a lot of coverage into an area you are building into and then you come in later and put up more towers to get people switched off of it and on a LOS technology and then maybe you still will only need the 900 sectors to cover a couple directions from the tower so you can take all the sectors down but 1 or 2.
On Tue, Nov 22, 2016 at 10:36 AM, Josh Reynolds <[email protected]> wrote: > Considering 900mhz is only going to get worse in almost every location, > why would one continue throwing money at this? Is the time and money even > expected to be recovered? Equipment costs, installation, configuration, > constant tweaking, etc... Only to find out that in the very near future you > will have to go a different route. > > What am I missing? > > On Nov 22, 2016 9:29 AM, "Bill Prince" <[email protected]> wrote: > >> Could also use a 2-way splitter, and only lose about 3db. Then put two up >> with an ABAB configuration. You'd still be using 2 APs, but the performance >> would be quite a bit better. >> >> >> bp >> <part15sbs{at}gmail{dot}com> >> >> >> On 11/22/2016 7:24 AM, Adam Moffett wrote: >> >> Maybe he's the one guy with no noise in 900mhz. We don't know that from >> back here. >> >> You could use a cheaper V+H antenna on the AP as long as you use V+H >> antennas on the CPE. >> >> You could also build an array of four sector antennas with a four-way >> splitter. You lose at least 6db on the splitter, but if you're looking at >> 5dbi and 7dbi omnis then it's probably in the same ballpark. The good >> thing is you could set a different tilt angle in different directions and >> if load required it in the future you could go to two 2-way splitters and >> two APs. >> >> ------ Original Message ------ >> From: "Kurt Fankhauser" <[email protected]> >> To: [email protected] >> Cc: [email protected] >> Sent: 11/22/2016 10:12:13 AM >> Subject: Re: [AFMUG] Dual-slant 900mhz omni (for PMP450) ordering group >> >> >> You are wasting you time with omni's on 900mhz. So your sacrificing a lot >> of gain to get 360 degree coverage which in turn will result in higher >> overall noise floor and lower signal when this 450 product really starts to >> shine you need 25db+ SNR at the client side to get the higher modulation >> connections. So even if you got the Omni you'd going to be lucky to get >> 8-10db SNR to the client which means your only going to be running at 2x >> speed and getting 10mbps download which will probably be intermittent. I >> had a lot of omnis on FSK 900 and I can tell you that after having used the >> cambium slant sector on 450 I am a firm believer in sectors only for 900 >> from here on out. I have connections that are 3-4 miles out running 10mhz >> channels and getting 40mbps down/10mbps up. You will never get that with an >> Omni unless you have LOS and if you have LOS then why aren't you using >> another frequency band? >> >> On Tue, Nov 22, 2016 at 2:03 AM, Colin Stanners <[email protected]> >> wrote: >> >>> I've been looking for dual-slant 900mhz omni options that would allow >>> lower-cost PMP450 900mhz deployment on middle-of-the-woods towers where >>> there are only a small number of customers (and low noise). I know that >>> "omnis suck compared to sectors", but having nothing at all sucks more. >>> Due to the difficulty of designing dual-slant antennas and the small >>> market, options are very few. >>> >>> Commscope has the CH360QS, only 5dbi gain at ~900mhz... and it's a >>> cellular base station omni with all the fancy doodads: 1800-2200Mhz band >>> that WISPs can't use, internal GPS antenna, internal diplexer, >>> remote-controlled signal tilt on the upper band, etc. At $3500 per >>> antenna I hope that it makes your breakfast too. >>> >>> Alpha has the best design that I found at present, the AW3464. ~7dbi >>> gain http://alphaantennas.com/products/small-cells/aw3464/ . It's >>> ~$1200 USD which is still inexpensive compared to any other NLOS options. >>> >>> But currently those antennas cannot be bought - I spoke with Crossover >>> Distribution and Alpha, they haven't received enough POs to make a >>> production run, need 50 orders at a bare minimum. So if anyone else is >>> really interested in one or more of these antennas, ready to buy for sure >>> if they are available, e-mail me "If available, I will buy x number of the >>> Alpha AW3464 at $1200/USD each from Crossover." and I'll make a list, once >>> it hits 50+ antennas I'll speak with Crossover and see if it can happen. >>> >>> >> >>
