Acclaim Lighting Dyna Accent User Manual

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Acclaim Lighting Dyna Accent User Manual Manual pdf 20 page image

18 www.acclaimlighting.comOPTIMIZING SIGNAL STRENGTH VIA CHANNEL SELECTIONAria™ wireless transceivers use radio frequencies contained within the Industrial Scientificand Medical (ISM) band that runs between 2.4GHz and 2.5GHz. As one of the few license-free radio bands agreed upon in most countries, many other devices also use this band,most notably WiFi. Aria units use the ISM band in a different manner than WiFi and the twocan coexist. However, where distances between Aria units are great and WiFi access pointsare reasonably close, then interference can become an issue.WiFi uses the IEEE802.11 standard, which divides the ISM band into 13 (sometimes 14)channels, each of which is 22MHz wide. However, the channels overlap and so cannot allbe used simultaneously. Hence, most WiFi access points settle upon channels 1, 6 and 11 toavoid any overlap:124126243743 132 12 141 110 10985 6 75MHz3MHz112462Aria radio channelsWiFi2.4GHz 2.5GHz2.4GHz 2.5GHz2241712412WiFi(IEEE802.11)channels ChannelMid frequency3242242427524326243722MHz7244282447924521024571124621224671324722.4GHz 2.5GHzAria uses the IEEE802.15.4 standard, with channels that are 3MHz in width and do notoverlap. Many Aria channels do, however, coincide with the common WiFi channels. Thenotable exceptions are Aria channels 4, 9 and 14, which fall into the gaps between the mostcommonly used WiFi channels:Where interference is suspected, a radio frequency survey may provide useful indications.If you have control over the nearest WiFi access points, it is suggested that you lock themdown to one or more of the common channels (to prevent them from roaming) and selectAria channels that sit comfortably alongside.Note: The Aria channel notations (0 to 14) are directly equivalent to the IEEE802.15.4 channels 11to 25, inclusive.