I should think the opposite is true. Halve the signal, improve signal to noise 3 dB. Half it again and the improvement is 6 dB signal to noise. Should give you way more margin. My tests prove that out.
At 08:44 PM 11/22/2009, you wrote: >IIRC, 5MHz and 10MHz is more sucepstible to interference than 20MHz. > >On Sun, Nov 22, 2009 at 7:38 PM, Israel Lopez-LISTS < >ilopezli...@sandboxitsolutions.com> wrote: > > > I'm gonna have to set up the environment again. Only thing I cant > > simulate right now is distance. > > > > As long as it wasnt some voodoo config setting that made it work better, > > I might have to play with the Mobile NS2's settings for it to play nicely. > > > > OT: What is CCQ? > > > > -Israel > > > > Josh Luthman wrote: > > > It is very weird isn't it? > > > > > > Vi is better the Emacs. > > > > > > On 11/22/09, Mike <m...@aweiowa.com> wrote: > > > > > >> Josh: > > >> > > >> I thought that too. I have a handful of customers on a 5 MHz > > >> sector. Winbox shows this: > > >> > > >> Emacs! > > >> > > >> > > >> Mike > > >> > > >> At 07:32 PM 11/22/2009, you wrote: > > >> > > >>> I believe when you half the channels the rates also get halved - from > > >>> 54mbit > > >>> to 27mbit max (that is from 20mhz to 10mhz channels). > > >>> > > >>> I also can't see why you're voice would be having problems in half or > > >>> quarter channels unless there is a software bug. It should only > > improve > > >>> unless you're using all available bandwidth. > > >>> > > >>> Josh Luthman > > >>> Office: 937-552-2340 > > >>> Direct: 937-552-2343 > > >>> 1100 Wayne St > > >>> Suite 1337 > > >>> Troy, OH 45373 > > >>> > > >>> "The secret to creativity is knowing how to hide your sources." > > >>> --- Albert Einstein > > >>> > > >>> > > >>> On Sun, Nov 22, 2009 at 8:08 PM, Chuck Hogg <ch...@shelbybb.com> > > wrote: > > >>> > > >>> > > >>>> 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! 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