By Bruce Alexander
802.11 instant community web site Surveying and install starts with an creation to WLAN architectures and definitions after which strikes directly to website survey methodologies, assisting you investigate and deal with your site's particular wishes. The booklet delves into the deploy strategy for WLAN gear, together with the foundations and laws to which WLANs needs to adhere, a number of stumbling blocks that come up whilst fitting WLAN apparatus, and how one can attach WLAN items to the stressed community. 802.11 instant community website Surveying and install is your entire advisor to appearing a WLAN web site survey and effectively fitting your 802.11 instant network.This e-book is a part of the Networking know-how sequence from Cisco Press, which bargains networking execs important details for developing effective networks, figuring out new applied sciences, and construction winning careers.
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Extra resources for 802.11 wireless network site surveying and installation
Horizontally polarized (linear) antennas have their electric field parallel to the Earth's surface. WLANs seldom use horizontally polarized antennas, except in certain outdoor, point-to-point systems. Antenna Examples You can choose from a wide variety of antennas for use with WLAN equipment. The use of different antennas can simplify the installation of a WLAN system, and in some cases reduce the overall cost of the system. A thorough understanding of different antenna types available will enable the survey engineer and installer to provide a WLAN that not only provides adequate coverage but also helps to stay within budgetary constraints.
Frequency is a characteristic that relates to the physical relationship of the transmitted signal and time, whereas modulation deals with how information is carried on that signal. Signal strength and RF power are parameters that determine the energy level that is being received or transmitted. Frequency Back in 1864, the Scottish theoretician James Clerk Maxwell first developed the idea that electromagnetic waves arose as an electric current and changed direction. In the 1880s, Heinrich Hertz used this idea to develop the first RF device that sent and then received electromagnetic waves over the air.
A spread-spectrum transmitter is designed to send out (or emit) an RF signal. This (or any radio transmitter for that matter) is known as an intentional radiator. Intentional radiators emit signals that are wanted (or intended for emission). 11 transmitting devicesin other words, the radio energy produced to transmit informationcertain regulations refer to unintentional radiators. Practically any electronic device also emits unintentional RF emissions of some level of energy that can impact the operation of other devices.
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