At near the speed of light is the distance of a 20~40 miles really a factor?
Greg On Aug 31, 2010, at 5:32 PM, MDK wrote: > As the distances go up, the longer it takes for the packet to be transmitted > from one point to another, and the round trip time grows, which reduces the > throughput. > > My experience is, that it would be all but impossible to do two parallel > links in 5 ghz with UBNT stuff, as the antennas are not sufficiently > isolated from each other, and despite being on channels that don't overlap, > they still seem to have issues from strong nearby signals. And that would > be even more true, using 40 mhz channels, as the spectrum it's "listening" > to is so much wider. > > > Perhaps my early hardware hasn't the selectivity of later, but I haven't > heard there's significant differences. > > It was really my first thought, but so far I don't see it as viable unless > somehow I can physically isolate the two links so they don't hear the closer > transmitter. > > ++++++++++++++++++++++++++++++ > Neofast, Inc, Making internet easy > 541-969-8200 509-386-4589 > ++++++++++++++++++++++++++++++ > > -------------------------------------------------- > From: "Faisal Imtiaz" <fai...@snappydsl.net> > Sent: Tuesday, August 31, 2010 8:49 AM > To: "WISPA General List" <wireless@wispa.org> > Subject: Re: [WISPA] Suggestions for high bandwidth @ 25 miles. > >> >> On 8/31/2010 11:44 AM, MDK wrote: >>> Even when the radio rates stay up, throughput falls. >> >> >> Haven't seen that..... There are some issues as such due to alignment, >> firmware and Ack settings... that affect all links, medium range & long >> range. >> >> To get to higher end of the throughput / over the air rate, you will >> need to use 40meg channel / have a nice clean connection in the -60's... >> >> Faisal >> >> >> -------------------------------------------------------------------------------- >> 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/
