Enterasys-networks ROAMABOUT RBT-1602 Manuel d'utilisateur télécharger pdf (Page 19)

Determining the Antenna Locations

RoamAbout Antenna Site Preparation and Installation Guide 1-7

Other Factors That Can Reduce Antenna Range

Largereflectingsurfacesthatareparallelorpartlyperpendiculartotheradiosignalcause

reflectionsoftheradiosignal(s ee Figure 1‐3).Exam plesofreflectingsurfacesarebuildingswith

low‐emissivity(low‐e)glass,crowdedparkinglots,water,moistearth,moistvegetation,and

above‐groundpowerortelephonelines.

Becausesurrounding

objects,suchastrees,powerlines,andotherantennas,seriouslyreduce

efficiencyoftheantenna,itisveryimportanttomounttheantennaashighandclearofobstacles

aspossible.

Figure 1-3 Large Reflecting Surfaces

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 91 92

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Enterasys-networks ROAMABOUT RBT-1602 Manuel d'utilisateur Page 19