A 44 dB antenna (yes, they make them). Some radios can be set to negative dB, so if a radio could be set as far as -14 and was certified with it...
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com -------------------------------------------------- From: "Jerry Richardson" <[email protected]> Sent: Saturday, October 31, 2009 1:52 PM To: "WISPA General List" <[email protected]> Subject: Re: [WISPA] Backhaul Questions > 40 miles @ 5.4? > > How is that possible with a 30dB EIRP max limit? Sure you could use a 36dB > dish but I can't see how you can turn the power down enough to stay in > compliance. > > Jerry > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Mike Hammett > Sent: Saturday, October 31, 2009 11:45 AM > To: WISPA General List > Subject: Re: [WISPA] Backhaul Questions > > Well, depending on what the radio was certified with, you could > theoretically go 40 miles in 5.4 GHz. I'm not sure I'd put those antennas > on a Rohn 25, though. :-p > > MT 20 MHz can go 35 megs or so, depending on board HP and RF conditions. > > > ----- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > > > -------------------------------------------------- > From: "Eric Rogers" <[email protected]> > Sent: Saturday, October 31, 2009 8:30 AM > To: "WISPA General List" <[email protected]> > Subject: [WISPA] Backhaul Questions > >> Ok guys...Looking for both Mikrotik experience and others. We currently >> have a Mikrotik backhaul between each of our towers using NStreme and we >> have been extremely happy with the performance. We recently upgraded a >> tower because we were hitting 15M or so during peak times and was afraid >> it couldn't handle much more. We upgraded that backhaul to a Motorola >> PTP for future capacity. >> >> >> >> The questions: >> >> >> >> MT Gurus: >> >> Each backhaul ranges in distance, each ranges from 3 miles (3 backhauls) >> and the rest are about 12 miles (5 backhauls). Since we have been using >> Mikrotik, I have reliably seen up to 10 Meg, and I am afraid 15 Meg is >> pushing the envelope on a 20 MHz channel. >> >> >> >> How much capacity can I reliably push on a 20 MHz channel using NStreme? >> >> >> >> Other Gurus: >> >> I understand the following are loaded questions, but budget is around >> $1000-3000 range and the capacity needs to be around the 60Meg mark (30 >> each way or without a defined 1:1 guarantee, capability to flex and be >> able to push 30M each way). >> >> >> >> If I start upgrading to larger backhauls on busy links, what type of >> equipment should I look at? >> >> What can support VoIP? >> >> Anything that GPS times for frequency reuse? >> >> Anything work in the 5.4GHz range at a 12 mile distance? >> >> >> >> Eric Rogers >> >> Precision Data Solutions, LLC >> >> (317) 831-3000 x200 >> >> >> >> >> >> -------------------------------------------------------------------------------- >> 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/ > > > -------------------------------------------------------------------------------- > 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/
