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1.7.4.2
Base Radio Power Amplifier
The Power Amplifier (PA) in conjunction with the exciter provides the transmitter functions for the Base
Radio. The PA accepts the low-level modulated RF signal from the exciter and amplifies the signal for
transmission through the RF output connector.
1.7.5
Power Supply Unit
Depending on the configuration, the MTS includes one or two Power Supply Units (PSUs).
The PSU allows the MTS to operate in any of the following configurations:
•
DC power supply
•
AC power supply
•
AC power supply with a DC backup battery
1.7.5.1
Backup Battery
The PSU handles the automatic switchover to a backup battery in the event of an AC power supply
failure. The MTS charges the backup battery during normal AC operation. A temperature sensor
monitors the backup batteries temperature to ensure optimum charging.
NOTICE: The recommended batteries to be used are a Valve Regulated Lead Acid (VRLA)
recombination type, with -48 VDC nominal. Such as Enersys Power safe VFT type.
1.7.6
Cooling Fans
One or more fan modules generate an airflow through the MTS cabinets to manage their temperature.
Each module is comprised of two fans. Revolution of the fans is monitored by a sensor. In the event of
a failure, an alarm will be generated.
NOTICE: Low-power configurations of MTS LiTE and MTS 2 can be operated without cooling
fans.
6802800U74-AN
Chapter 1: MTS Overview
11
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Troubleshooting
