Motorola BT100 User Manual

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 preferable to have a full complement of channels 
available for balancing, you can adjust the BT100 adequately with a limited number of 

channels. 

You can install the BT100 housing on a messenger strand (aerial) or on a pedestal. The 

following subsections provide details on each application. 

The housing is normally mounted horizontally below the strand, with the electronics chassis 

removed, 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. 

1.65" Max.

1.50" Min.

 

To install the unit: 

Power down the cable before you install the housing. This avoids blown fuses, tripped circuit 

breakers, and possible personal injury. 

Mount the housing, and torque the two 5/16-inch messenger clamp bolts, located on the long 
sides of the housing (illustrated in Figures 2-5 and 2-7) to 12 ft-lbs.  

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 screw driver. An 

alternative 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 

six captive bolts. Torque to 18 to 22 in-lbs. 

7