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7-23
D-620003-0-20 Rev J
CONFIDENTIAL
Unison Component Installation Procedures
7.4.2.2
Installing Expansion Hubs in a Multiple Operator System
Installing Expansion Hubs in a multiple operator system is the same as described in
Section 7.4.2 on page 7-18.
If rack-mounting the Expansion Hubs, we recommend mounting all multiple operator
system hubs in the same rack(s) or location, grouped by frequency or carrier. For
example, group the Expansion Hubs for iDEN together, then the 800 MHz cellular
bands, and so on.
7.4.3
Installing RAUs
CAUTION:
Install RAUs in indoor locations only. Do not connect
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 800 MHz Cellular RAUs so that their antennas are apart enough
to reduce signal interference between the two bands. Refer to Section , “800 MHz
Isolation Requirements,” on page 7-23 for recommended distance between anten-
nas.
• Attach the RAU securely to a stationary object (that is, wall, pole, 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, the additional loss due to the ceiling material must be considered when
estimating the antenna coverage area.
800 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
