User manual

Reference ILX34-AENWG ♦ Point I/O Platform
User Manual Wireless POINT I/O Adapter
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Page192of209 ProSoftTechnology,Inc.
 September19,2011
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6.5.9 Antenna location, spacing, and mounting
Considerthefollowingpointsregardingantennalocation,spacing,andmounting:
 Whenplacingantennas,ensureaclearlineofsightbetweenthemasterradio'santennaand
alloftheotherradioantennas.
 Ifthesitebasecontainsobstructingterrainorstructures,mounttheantennaonatoweror
rooftopto
providealine‐of‐sightpath.Theline‐of‐sightconsiderationbecomesmore
importantasthetransmissionpathbecomeslonger.
 Mounttheantennasashighoffthegroundasispractical.Thehigheranantennaisabove
theground,thegreateritsrange.
 Mounttheantennasawayfrom
massivestructures.Radiosignalsbounceoffmetalwalls,for
example,whichcancompromiseaclearsignal.
 Mountantennastominimizetheamountofnearbymetalstructuresintheantennapattern.
 MounttheantennasandinstallradiosawayfromsourcesofRFinterference.
 Usetheshortestpossibleantennacable
length.Signalslosepoweroverthecable'sdistance.
 Chooseantennasthatareappropriateforthenetwork'sintendedfunction.
 Ifantennasareonradiosonthesamenetwork,mountthemsotheyhavethesamepolarity.
Iftheantennasareonseparatenetworks,mountthemsotheyhavea
differentantenna
polarity—forexample,mountoneantennaverticallyandtheotherhorizontally.
 Spaceradiosatleastthreefeet(onemeter)apartsotheydonotoverloadeachother.If
antennasmustbeneareachother:
o Mountomnidirectionalantennasdirectlyaboveeachother.
o Positiondirectionalantennassotheydonotpointatnearbyantennas.Placeantennas
sidebysideiftheypointinthesamedirection.Placeantennasbacktobackiftheypoint
inoppositedirections.
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