User's Manual

APPLICANT: MOTOROLA SOLUTIONS EQUIPMENT TYPE: ABZ89FC5823B
109AB-5823B
User / Operational Manual
Functional Description / Operation of Modules (Draft)
EXHIBIT D1-6
Power Amplifier Input / Output Connections
There are three electrical connection assemblies on the power amplifier:
• RF output (front QN "quick-N" connector) on front of power amplifier module. This is cabled to the N-type female
bulkhead connection at the rear of the base radio housing
• DC power supply/control signal (backplane connection)
• RF input/feedback (backplane connection)
Power Amplifier (Backplane Connections)
Function of the Fan Module
The fan module provides intermittent forced air cooling for the power amplifier and transceiver modules. The fans are
controlled by a thermostat in the modules behind the fan module. The fan module houses two 119 mm axial fans which
deliver a total of approximately 160 cubic feet per minute of airflow. Nominal fan speed is 4100 revolutions per minute.
Each fan has a built-in speed sensor which turns on the red Fan Alarm LED if the fan speed for either fan falls below
30% of the rated speed.
If the fan module is used for the Power Efficiency Package, the following must be configured in the CSS in order to take
full advantage of the Power Efficiency Package:
• Optional fan holdover time (length of time the base radio/receiver fan stays ON after transmission).
• Disabling one of the fans within the fan module. See 9.3.1 How To Replace the Fan Assembly, page 9-11 for
instructions on how to disable one of the fans.
• Configuring the base radios Tx Power Out in the CSS should be limited to 50 W.
The fan module connects to the base radio backplane through a 4pin port on the front of the base radio chassis. The power
supply module has its own fan which provides independent airflow.
Fan Module