Motorola BLE*/* - Manual (Page 40)

BLE*/* Installation and Operation Manual
Section 5
Installation
The field installation procedures presented in the following subsections assume that the
amplifier was previously tested and bench aligned. Cable power and RF signal must be
available on the system. Although it is desirable to have a full complement of channels available
for balancing, you can adjust the BLE*/* adequately with a limited number of channels.
You can install the BLE-HSG/15 on a messenger strand (aerial) or on a pedestal. The following
subsections provide details on each application.
Aerial Installation
The housing is normally mounted without the electronics chassis to avoid possible damage
during installation. Connections are made using standard pin-type connectors with a nominal
center-conductor diameter of 0.067 inches. The minimum length of the center-conductor pin is
1.5 inches and the maximum length is 1.65 inches. Longer pins can extend past the
center-conductor seizure mechanism and degrade the match. Extremely long pins can result in a
short circuit.
Figure 5-1
Center-conductor pin length
1.65" Max.
1.50" Min.
To install the unit:
1 Power down the cable before you install the housing. This avoids blown fuses, tripped circuit
breakers, and possible personal injury.
2 Mount the housing, and torque the two 5/16-inch messenger clamp bolts (illustrated in
Figure 2-5) to 10 to 12 ft-lbs.
3 Form the customary expansion loops and make all cable connections according to system
design.
4 Tighten the center-conductor seizure screw using a Phillips-head screwdriver. An alternate
method is to use a 3/16-inch socket and a torque wrench. The recommended torque is
12 in-lbs. maximum.
5 To avoid water ingress, ensure that aluminum connectors are torqued to the specifications
recommended by the connector manufacturer.
6 If previously removed, re-install the electronics chassis and fasten it to the housing with the
four captive bolts. Torque to 18 to 22 in-lbs.
7 Remove the input pad ( JXP - IN ) to avoid damage to the hybrids.
8 Apply power to the unit and allocate a few minutes for warm up.