User's Manual Part 3

Backplane/Interface Boards - 126 -
®
Affinity LBD-200C-N1 Transmitter
Product Manual
16.6 Master Support Interface Board
Overview
The Master Support Interface (MSI) Board assembly performs several functions within the
Affinity transmitter.
x Interface to external management
system.
x Control and monitoring of the plug-in
modules, via communication and
electrical interfaces
x Management (control, fault
notification) of modulator
x On-board Master Reference Oscillator
(optional, for DVB-H applications)
x Fast response PA module (Amplifier
plug-in) protection
Hardware systems
The MSI hardware performs various hardware functions and provides a platform for the
management of the internal transmitter components. The circuitry contains a primary
microcontroller (Main MCU), a primary programmable logic device, or CPLD (Main CPLD), and
an MCU and CPLD dedicated to an auxiliary serial port provided by the transmitter (Port MCU
and Port CPLD). Other key circuitry includes a Master Reference Oscillator system, Power
Amplifier Segments manager, Fast ALC Reduction circuit, and Remote and Local serial busses.