Service Manual

268
6802800U74-AN
Chapter 7: Radio Frequency Distribution System
Duplexer
DC
RX
BR1
LNA
RX
DC
RX
BR2
7V DC supply
Antenna
VSWR
Coupler
Detector
TX
To Hybrid o
A/D
CAN Bus
Ctrl
DC
CAN Bus
2xCAN Bus
7V DC supply
NOTICE: Unused RX outputs should be terminated.
The receiver LNA and splitter provides multiple receive signal ports. An amplified output is provided for
connection to the other cabinet in an expansion configuration.
The digital power monitor (DPM) is a directional coupler that measures forward and reverse Power.
Power and VSWR information can be read through the CAN bus.
Figure 144: Schematic Diagram of MTS LiTE / MTS 2 Duplexer
r BR
NOTICE: Unused RX outputs should be terminated.
7.2.3.1
Replacing the MTS LiTE / MTS 2 Duplexer
For a list of available FRUs, see Field Replaceable Units (FRUs) on page 446.
Process:
1 Remove the Duplexer, see Removing the MTS LiTE / MTS 2 Duplexer on page 269.
2 Insert the Duplexer into the filter tray, see Inserting the MTS LiTE / MTS 2 Duplexer into the
Filter Tray on page 269.
3 Update the mapping list with the new unit TrackID, see Updating the Mapping List with the New
Unit TrackID on page 269.