Interference protection is exactly why I went with 90*. Not that there's much to be worried about where I am, but I figured it a better decision to overbuild. That and extra capacity, something most WISPs don't engineer for.
The omnis are only for small areas, of a half mile or less. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com -------------------------------------------------- From: "Jack Unger" <jun...@ask-wi.com> Sent: Wednesday, January 07, 2009 1:34 PM To: "WISPA General List" <wireless@wispa.org> Subject: Re: [WISPA] Typical Sector count > Mike, > > Just my 2 cents worth (after 50 years of RF experience). > > In many cases, four 90-degree sectors is a waste of money. You will have > more sector overlap than need. Three 120-degree sectors is just as > effective and costs less. > > A single omni is normally a bad idea. You have no protection from > interference coming in from any direction. > > jack > > > Mike Hammett wrote: >> Since Patrick posed that question about cost for a typical 3 sector >> tower, I ask the following question: >> >> How many sectors is typical for you? >> >> My answer is 4x 90*, unless it's a small area repeater, which is then a >> single omni, or different as that situation requires. >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> >> -------------------------------------------------------------------------------- >> 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/ >> >> >> >> > > -- > Jack Unger - President, Ask-Wi.Com, Inc. > Serving the Broadband Wireless Industry Since 1993 > Cisco Press Author - "Deploying License-Free Wireless WANs" > WISPs - Do you know where your customers are? > For wireless coverage mapping see http://www.ask-wi.com/mapping > FCC Lic. #PG-12-25133 LinkedIn Profile > <http://www.linkedin.com/in/jackunger> > Phone 818-227-4220 Email <jun...@ask-wi.com> > > > > > -------------------------------------------------------------------------------- > 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/
