Pdu Installation - ADC ClearGain User Manual

2.2.3 Installing Coaxial Cables
Caution: Before connecting any coaxial cables, ensure that the BTS transmitter output is
turned off and that precautions are taken to ensure that the transmitter cannot be activated
during the equipment installation.
Two short coaxial jumpers should be pre-made. One will connect the BTS port to the hardline
and the other will connect the ANT port to the antenna.
Most installations require two good quality flexible coax jumpers, normally terminated with
7/16DIN-7/16DIN plug connectors. Check gender of hardline and check if Antenna pigtail is
present, adjust accordingly for a correct match.
The coaxial feeder that runs from the base station should be hooked to the BTS port of the MHU
using a jumper cable. The reason for the jumper cable is to ensure that mechanical forces caused
by temperature change will not damage the MHU connectors. Tighten the connectors to 25–30
Nm (18.43–22.13 ft-lbs.) torque.
To improve the reliability of the connection, the connector joint can be protected. This can be
done, for example, by installing specific weatherproof tape over the cable connectors.
Loose cable should be fixed to the tower using cable brackets.
2.3

PDU Installation

2.3.1 Mechanical Attachment of PDU
Warning: Never install the Power Distribution Unit in a wet location or during a lightning
storm. When installing or modifying communication lines, disconnect lines at the interface
before working with uninsulated lines or terminals to prevent electrical shock.
The PDU should be mounted in accordance with local code using appropriate hardware (customer
provided). The PDU has two mounting holes on either side, as shown in
guidelines for standard wall mount, masonry wall mount, and rack mount of the PDU.
2.3.1.1 Standard Wall Mount
When mounting the PDU on a wooden or metal surface, it is recommended that it be installed
on pressure-treated plywood (customer provided) with a minimum thickness of 1.9 cm. The
plywood should be firmly secured to the wall studs.
2.3.1.2 Masonry Wall Mount
When mounting the PDU on a masonry surface, it is important that the bolts (especially the
upper bolts) be located as close as possible to the center of bricks or blocks. Masonry mounting
screws are not provided.
ADCP-75-154 • Issue 3 • August 2006
Figure 7. Below are
© 2006, ADC Telecommunications, Inc.
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