Jerry Richardson Sent Mobile
On Aug 4, 2010, at 12:58 PM, "Fred Goldstein" <[email protected]> wrote: > At 8/4/2010 03:37 PM, Jerry Richardson wrote: >> It will not work. >> >> But you would be surprised how well these run at 5 or 10 MHz >> channels. > > With how much spacing between them? If I could put them on adjacent > 10 MHz center frequencies, that would solve a lot of problems, and > even 5 MHz channels with 10 MHz spacing (and thus a 5 MHz guard band) > would be reasonable. But 20 MHz spacing is problematic. > > How much throughput can a quarter-channel get? The Rocket data sheet > is not very complete; it doesn't even mention subchannel > support. The RM5 spec sheet says that MCS12 has -84 dB > sensitivity. That gets 78 Mbps in a full 20 Mbps channel, 162 in a > double-wide, and a bit more with the short guard interval. If I > could share 15 Mbps among the sector users, in 5 MHz, I think > everyone should be happy. And I'd expect -89 to -90 sensitivity. > >> Jerry Richardson >> Sent Mobile >> >> On Aug 4, 2010, at 12:33 PM, "Fred R. Goldstein" >> <[email protected]> wrote: >> >>> If I have a site with, say, Ubiquiti Rocket M5 radios plugged into >>> 120 degree sector antennas, with Airmax (TDMA) turned on, do they >>> have to be on separate frequencies, or can they coexist on one? The >>> 5.8 GHz band is kind of crowded to be having three access >>> frequencies >>> plus two or more backhaul frequencies... thanks. >>> > > -- > Fred Goldstein k1io fgoldstein "at" ionary.com > ionary Consulting http://www.ionary.com/ > +1 617 795 2701 > > > > --- > --- > --- > --- > -------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > --- > --- > --- > --- > -------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
