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5.2 Donor Antenna Installation Guidelines
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Accurately determine the azimuth to the donor site. Obtain the donor site information and
approval from the service provider/carrier.
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Ensure that the radiation path to the donor site is unobstructed.
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Mount the donor antenna at or toward the edge of the roof, in the direction of the donor
site. Avoid having the RF signal from the donor pass above the location(s) of the service
antennas. Normally, the service antennas are installed behind and below the donor antenna,
as viewed from above. This approach helps avoid interference and feedback to and from the
service antennas.
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Normally, mounting the donor antenna higher will allow a less obstructed path to the donor
site. However, in high traffic metro areas, avoid mounting the donor antenna higher than
necessary, as the quality of the donor signal may become less stable and it is more likely to
encounter adjacent channel interference.
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When possible, shield the rear of a donor antenna by locating it so that any HVAC units
and/or penthouse structures are behind the antenna, relative to the donor cell site location.
5.3 Indoor Antenna Installation Guidelines
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Use omnidirectional antennas (see section 2.4. Optional Accessories) indoors and locate
them centrally with respect to the intended coverage area to minimize signal leakage to the
outside. Only use directional antennas indoors in special cases when higher gain and
directionality would be helpful and RF exposure limits will not be exceeded.
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To avoid Signal Booster uplink overload and gain limiting, mount the indoor antennas away
from areas where mobile subscribers frequently use their phones / radios, such as desks or
dispatch areas.
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To determine the quantity and locations of indoor antennas, measure Received Signal
Strength Indication (RSSI) using DM Tool software to determine areas of weak signals. These
are the approximate areas where indoor antennas may be needed.
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Be aware that the signal from an indoor antenna, in most cases, can be expected to
penetrate approximately two standard sheet rock walls to reach users. If the signal must
travel through more than two walls, or if the walls are made of materials other than sheet
rock, it may be necessary to split the available signal and add more antennas.
©2017 Westell Technologies
1.877.844.4274
CAUTION
Close proximity to the donor or server antennas with the Signal
Booster in operation may expose users or installers to RF fields that
exceed FCC limits for human exposure.
Turn power to the Signal Booster off when connecting or disconnecting
cables.
PS71090 Product Manual
March 2017, Rev G
WESTELL.COM
March 2017; Doc No. CS14702802UM rG
Page 26 of 50
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