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Help Hot Line (U.S. only): 1-800-530-9960
6-15
D-620605-0-20 Rev A
CONFIDENTIAL
Fusion SingleStar Installation Procedures
6.4.2
Installing RAUs
CAUTION:
Install RAUs in indoor locations only. Do not con-
nect an antenna that is installed in an outdoor location to an RAU.
Installing RAUs
Mount all RAUs in the locations marked on the floor plans.
Considerations:
• Install iDEN and 850/1900 MHz RAUs so that their antennas will be separated by
enough space to reduce signal interference between the two bands. Refer to
Section , “800/850 MHz Isolation Requirements,” on page 6-15 for recommended
distance between antennas.
• You can place the unit, without its fastening hardware, on a flat surface, such as a
shelf, desk, cabinet, or any other horizontal surface that allows stable placement
with the mounting base facing down to the mounting surface. For mounting to
other locations ( that is, walls, ceilings, poles) the RAU must be securely mounted
using the 4 sloted mounting holes provided with #6 diameter fasteners. This
method of mounting must securely hold a minimum of 7 lbs. load.
• Attach the RAU securely to a stationary object (that is, a wall, pole, or ceiling tile).
• For proper ventilation:
• Keep at least
76 mm (3 in.)
clearance around the RAU to ensure proper venting.
• Do not stack RAUs on top of each other.
• Always mount the RAU with the solid face against the mounting surface.
Installing Passive Antennas
Refer to the manufacturer’s installation instructions to install passive antennas.
Location
Passive antennas are usually installed below the ceiling. If they are installed above
the ceiling, you must consider the additional loss due to the ceiling material when
estimating the antenna coverage area.
800/850 MHz Isolation Requirements
When deploying any RF system, give special attention to preventing receiver block-
ing or desensitization by out-of-band transmitters. Typically, sharp filters in the
receiver front-end will reduce the interfering transmitters to tolerable levels. In select
cases, the interferers may occupy a frequency band that is directly adjacent to the
receiving band and cannot be adequately rejected by filtering. The only recourse in
these situations is to provide sufficient isolation by physically separating the interfer-
ing transmitters and receivers.
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