User's Manual

Table Of Contents
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.
MTS Overview | 47
6802800U74-AD | September 2014 | Send Feedback
Applicant: Motorola Solutions
Equipment Type: ABZ89FC5827 / 109AB-5827
Exhibit D2