Heya Jeremy, Use a known gain antenna (I don't know what the ns2 is), get to where you are looking right into the main beam of their antenna exactly 1 mile (or two or whatever, but an exact distance in even miles) away. Send me the rssi value and I'll run the calcs to figure out what their eirp is.
You might want to try this with a couple of different radios as these signal levels don't hardly seem possible. If I figure a 30dB (1 watt) transmitter into a 15dB omni (pretty common screw up) I still only get -38 at .5 miles to a 15dB cpe antenna. 32 watts of output vs. the 4 watts that a base station can legally have. He'd have to be in excess of 64 watts if my assumptions are right. Here's one of the problems these days. I've got, waiting for me to try it, a 30dB tx power radio. That's a LOT of tx power. But it's what the manufacturers are shipping these days. Even the xr2 defaults to 28dB in a MT radio. I ALWAYS turn them down. Usually to the 17 to 20 dB range. They system works much much better that way. Many people still treat RF like horsepower though. If a little is good, more is better. Yet you don't drive your car at wide open throttle all of the time, even in a racing situation. Why does anyone think it's a good idea on the radios? Hope that helps, marlon ----- Original Message ----- From: "Jeremy Parr" <jeremyp...@gmail.com> To: "WISPA General List" <wireless@wispa.org> Sent: Tuesday, October 13, 2009 12:39 PM Subject: Re: [WISPA] Competitor at -40 > 2009/10/13 Jeremy Parr <jeremyp...@gmail.com>: >> Gotta love it. Picking up another wisps overamped Omni at -40 with a >> 16dbi panel, pointed *away* from them. I thought this was supposed to >> be a fun job? > > And a NS2 about 1/2 mile away from their omni, aimed 25* off and > separated by a few sparse trees is seeing it at -33. Oh joy. > > > -------------------------------------------------------------------------------- > 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/
