First, you should have a better signal than -70 at <5Miles away with a 24dB/NS2 antenna and a B2HP/9dB omni. I get 65 or better with a 19dB panel.
Don't forget, 10MHz channel is 1/2 available bandwidth and 5MHz is 1/4 available bandwidth. Really, you will get about 7-10MBit aggregate (depending on how many customers) on a 5MHz channel connected at 54MBit, which requires signals at -74dBm with a good fade margin (10dB). Also, the TX power is significantly less for 54MBps (23dBm) vs 24MBps(28dBm), less than half. Likely, you are connecting at 48MBps or 36Mbps, which at that rate your total available "real case" bandwidth is as little as 4MBps, while at 20MHz you are at 15+. A narrower channel should not affect your transmission, likely will make signals better, roughly double (+3dBm) from 20-10, and double from 10-5(total +6dBm). Regards, Chuck Hogg Shelby Broadband 502-722-9292 ch...@shelbybb.com http://www.shelbybb.com -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of os10ru...@gmail.com Sent: Sunday, November 22, 2009 6:20 PM To: WISPA General List Subject: Re: [WISPA] 10MHz, 5MHz - unstable for voice? Well next time definitely bring more food! Beef jerky and granola bars. In my testing the narrower channels just made things slower. I was testing in a pristine area where there was no other 5.8GHz going on. >From what I hear if the environment had been polluted performance might have actually gone up with the narrower channels. >From what I've read narrower channels doesn't effect packet size or transport. But switching to WDS bridged does. Greg On Nov 22, 2009, at 6:15 PM, Israel Lopez-LISTS wrote: > Its not in the field, but it is sitting here in my bedroom looking cool :). > > I was thinking that using the 10/5MHz bandwidth required one to setup > something else. I'm not that familiar with the use of half/quarter rate > channels and how that affects the frame transport/packet size etc,. > > I wonder if it was environment based rather than > 'software/configuration' based. If I get some time this evening I might > setup the gear again for more focused testing (Testing in the field with > volunteers who are cold and hungry dont usually respond well to testing > plans). > > -Israel > > os10ru...@gmail.com wrote: >> Just for kicks I'd try WDS bridged. Do you have control from where you're at now? Is the equipment still set up? >> >> Greg >> >> On Nov 22, 2009, at 6:02 PM, Israel Lopez-LISTS wrote: >> >> >>> @Travis Johnson - Yes Upgraded to newest firmware for the two units >>> >>> @os10rules - Nope, Fixed was simple AP and Mobile was Station modes >>> >>> os10ru...@gmail.com wrote: >>> >>>> Running WDS bridged? >>>> >>>> Greg >>>> On Nov 22, 2009, at 5:37 PM, Israel Lopez-LISTS wrote: >>>> >>>> >>>> >>>>> Hey All, >>>>> >>>>> I did some field tests (for overseas volunteer project) with some >>>>> Ubituiti gear; Nanostation2 & Bullet2HP. >>>>> >>>>> One thing that was surprising was the performance degradation when >>>>> switching from 20MHz to 10MHz/5MHz. Our tests were Raw Bandwidth >>>>> Tests(AirOS), Video (VLC UDP Stream), Voice (Trixbox G711 Voice Call), >>>>> and MTR (Latency, Jitter) >>>>> >>>>> I still have data to collect and prepare a report for the tech team, but >>>>> we did notice that when we switched to 10 or 5MHz bandwidth our voice >>>>> calls was greatly degraded. Only one way; from Fixed to Mobile I could >>>>> hear the Fixed station easily. Mobile to Fixed the voice was choppy. >>>>> We started to get packet loss & massive jitter on 10MHz, just going back >>>>> to 20MHz made the links stable. >>>>> >>>>> Fixed Station: On a mountain side - HPOL 9dBI Omni Directional with a >>>>> Bullet2HP @400mW >>>>> Mobile Station: 8km away near large body of water - Bullet2HP @400mW w/ >>>>> 24dBi Directional (HPOL Alignment) -70dbm RSSI >>>>> >>>>> Any ideas? We are planning on using 10MHz channels & H-Pol to combat >>>>> any future spectrum pollution and voice calls over this network is expected. >>>>> >>>>> -Israel >>>>> >>>>> >>>>> ------------------------------------------------------------------------ -------- >>>>> 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! 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