Have two Have 4 on one tower, 2 in and 2 out, around 52-55meg tcp thoughput. But we are NOT using cross pol. Each link in the same direction uses both vertical or both horizontals on the two dual pols.
-----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Gino Villarini Sent: Wednesday, August 19, 2009 8:52 AM To: sc...@brevardwireless.com; WISPA General List Subject: Re: [WISPA] Bullet M5 HP Ever wondered why tcp troughput is so low vs udp on this mimo units? Cross pol interference ... that's why Try to run 2 mikrotik mimo setups on the same site.... then report back Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Scott Carullo Sent: Tuesday, August 18, 2009 10:51 PM To: sc...@brevardwireless.com; WISPA General List Subject: Re: [WISPA] Bullet M5 HP Tom, I believe there is a huge advantage to being able to use HPOL and VPOL at the same time with the same 20Mhz channel and get twice the bandwidth. Its sort of like your personal gps sync within the device. Realistically (for me anyway) I find that if there is strong noise on a give channel and its close enough (same tower / site) than changing the polarity won't help make the freq usable any way. Therefore I argue that MIMO (2x2) allows for BH use the actual more efficient use of spectrum. I do not compare that at all to the same as using two different 20Mhz chunks of spectrum and argue that you can indeed get twice the bandwidth out of the same 20Mhz (or 40Mhz if your environment allows) spectrum. I'm seeing it right now in my test gear or I'd be a skeptical as the bunch... I like what I see so far but my testing has been somewhat limited. I'll know a lot more this time next month. I'm sure this discussion will do nothing but get more interesting in the near future when the rubber hits the road. Scott Carullo Brevard Wireless 321-205-1100 x102 ------------------------------------------------------------------------ -------- WISPA Wants You! Join today! http://signup.wispa.org/ ------------------------------------------------------------------------ -------- WISPA Wireless List: wireless@wispa.org 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: wireless@wispa.org 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: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/