Mts Modules; Rf Distribution System; Preselector - Motorola DIMETRA MTS 4 Installation, Configuration, And Service Manual

Applicant: Motorola Solutions
The modules that comprise the Expansion Cabinet vary based on the type of configuration chosen. A typical
configuration includes the following modules:
• RX Splitter(s)
• Cavity Combiner(s)
• eXpansion HUB (XHUB)
• Base Radios
• Power Supply Unit(s)
The door of the cabinet has a lock to prevent unauthorized opening. Unauthorized opening of the door generates an
alarm.
For a complete description of each module, refer to the appropriate chapter. Each chapter provides an overview, a
description of switches, indicators and test connectors, and a functional description of each module. Troubleshooting
and removal/replacement procedures are also included for modules having Field Replaceable Units (FRUs).

MTS Modules

Each MTS comprises of a number of modules. Some of these modules consist of subcomponents.
MTS modules include:
• RF Distribution System (RFDS) module
• RF Filter module
• Site controller module
• XHUB module
• Base Radio module
• Power supply module
• Cooling fans module

RF Distribution System

The RF Distribution System (RFDS) module has the following subcomponents:
• Preselector (MTS LiTE, MTS 2 and MTS 4 prime only)
• Duplexer (MTS LiTE, MTS 2 and MTS 4 prime only)
• Post Filter (MTS 4 prime only)
• Cavity Combiners (CC) (MTS 4 and Expansion Cabinet only)
• Hybrid Combiner (HC) (MTS 2 and MTS 4 Prime Cabinet only)
• Rx Splitter (Expansion Cabinet Only)
Note: The Preselector types and Duplexer types used in MTS LiTE and MTS 2 are different from the types
used in MTS 4.

Preselector

The Preselector is a bandpass filter, which allows only the receiver signals to pass. The Preselector incorporates a
Receiver Multicoupler (RMC).
For 400 MHz, the filters bandwidth is 5 MHz, and it is designed to block transmitter frequencies as close as 5 MHz
from its band edges.
Equipment Type: ABZ89FC5827 / 109AB-5827
6802800U74-AD | September 2014 |
MTS Overview | 47
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