User's Manual Part 1

System Description - 30 -
®
Affinity LBD-200C-N1 Transmitter
Product Manual
6 General System Description
The Thales Affinity® LBD-200C-N1 low power solid-state DVB-H transmitter is intended to
provide maximum flexibility for site layout and installation. The Affinity® transmitter contains
integrated modular assemblies that were designed to fit into EIA standard 19” rack units. The
transmitter consists of several of these rack units that house, with the exception of the
Downconverter Module, RF filter and HVAC unit, the major components that make up the
transmitter system. This module design allows operators of the transmitter to easily install,
operate and maintain the equipment.
The basic topology of the Affinity® LBD-200C-N1 transmitter configuration is as follows:
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Site Management System
Satellite Receiver and
Remultiplexer
Sirius DVB-H Exciter
Front-End Power Supply
Driver Section
o Power Supply Module
o Upconverter Module
o Downconverter Module
Power Amplifier (PA)
Segments
UPS system
RF Filter
Phone System Interface
HVAC Unit
The low power microwave
transmission system transmits a
digitally modulated average power
signal on a single 1670-1675MHz
channel. The LBD-200C-N1
generates 200 watts average power using a COFDM modulation scheme.
Digital transmission techniques provide superior performance over analog methods with
reduced susceptibility to noise and co-channel interference. COFDM modulation provides
exceptional throughput and spectral efficiency, while meeting the needs of mobility. The system
architecture is based on: advanced transistor technology, low-loss power combining, and
distributed control and power conversion. Some unique advantages of this new design are:
flexibility/scalability, lower downtime, and lower operating costs. The modular structure of this