Keep in mind that this is not necessary true depending what chip set the card is using. For example the SR2 cards will always listen to 20Mhz even if they only transmit on 10MHz or even 5MHz. While for example a XR2 set in 10MHz mode will only listen to 10MHz.
/Eje CTO WISP-Router, Inc. Sent via BlackBerry from T-Mobile -----Original Message----- From: Scott Reed <scottr...@onlyinternet.net> Date: Sat, 02 May 2009 11:40:31 To: WISPA General List<wireless@wispa.org> Subject: Re: [WISPA] Sector separation/isolation Right now channel 1 uses channel 1, 2 and 3. Channel 6 uses 4-8. When you go to 10MHz channels 1 will use 1 and 2. 6 will use 5, 6 and 7. Therefore, you are no longer on adjacent channels, there is a gap of channels 3 and 4 between. Also, you will cut down on the amount of other noise you hear because you listen to only half as much spectrum. And, you will have more effective power so noise may be less of a problem. I am sure there are some RF savvy folks out there that can explain it better. Michael Baird wrote: > I can try that, can you tell me why that would make a difference though > with the AP's seeing each other at such signal levels? Will changing to > 10mhz channel width's cause the AP's to see each other at a lower RSSI? > > Regards > Michael Baird > >> Use 10mhz channels instead of 20mhz. >> >> Kurt Fankhauser >> WAVELINC >> P.O. Box 126 >> Bucyrus, OH 44820 >> 419-562-6405 >> www.wavelinc.com >> >> >> -----Original Message----- >> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >> Behalf Of Michael Baird >> Sent: Saturday, May 02, 2009 6:54 AM >> To: WISPA General List >> Subject: [WISPA] Sector separation/isolation >> >> We are still experimenting with aligning sector's on our towers. We are >> attempting to use 3 120 degree/13db/6.5 vb/7 degree downtilt, antennas >> to cover 360 degrees. I just inspected the towers myself, and noticed >> they are setup at 30 degrees/150 degrees/290 degrees (so they aren't >> right exactly). So the problem that caused me to inspect the tower was >> the signal level I can see the other AP's at. >> >> AP 30 can see AP 150 at -39 and AP 290 at -42. >> AP 150 can see AP 30 at -42 and AP 290 at -70. >> AP 290 can see AP 30 at -39 and AP 150 at -65. >> >> So I'm guessing that the reason 150/290 are much higher is because of >> the additional 20 degrees between them. These AP's are on channels >> 1/6/11, I'm wondering if I should worry about seeing the other AP's with >> such a hot signal, and if so what are some good ways to isolate them better. >> >> Regards >> Michael Baird >> >> >> ---------------------------------------------------------------------------- >> ---- >> 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/ > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.323 / Virus Database: 270.12.13/2091 - Release Date: 05/01/09 > 17:52:00 > > -- Scott Reed Sr. Systems Engineer GAB Midwest 1-800-363-1544 x4000 Cell: 260-273-7239 -------------------------------------------------------------------------------- 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/
