User's Manual

Digital UHF Driver/Transmitter Table of Contents
LX Series, Rev. 1 April 29, 2008
i
TABLE OF CONTENTS
CHAPTER 1: INTRODUCTION
SECTION PAGE
1.1: Manual Overview..................................................................................1-1
1.2: Assembly Designation Numbers.............................................................1-1
1.3: Safety.................................................................................................1-2
1.4: Contact Information ........................................................................ 1-2
1.5: Material Return Procedure.....................................................................1-2
1.6: Limited One Year Warranty for Axcera Products.......................................1-3
CHAPTER 2: SYSTEM DESCRIPTION & REMOTE CONTROL CONNECTIONS
2.0: System Overview ................................................................................2-1
2.1: Exciter Amplifier Chassis Assembly ........................................................2-1
2.1.1: IF Processor Module ....................................................................2-2
2.1.2: LO/Upconverter Module ...............................................................2-4
2.1.3: Control & Monitoring/Power Supply Module....................................2-6
2.1.4: Driver Amplifier Module ...............................................................2-7
2.2: RF Output Assemblies...........................................................................2-9
2.3: Control and Status ...............................................................................2-9
2.3.1: Front Panel LCD Display Screen....................................................2-9
2.4: System Operation ................................................................................2-9
2.4.1: Principles of Operation.................................................................2-9
2.5: Maintenance......................................................................................2-11
2.6: Customer Remote Connections...................................................... 2-11
CHAPTER 3: SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES
3.1: Site Considerations...............................................................................3-1
3.2: Unpacking the Chassis w/Modules..........................................................3-5
3.3: Installing the Chassis w/Modules ...........................................................3-5
3.4: AC Input .............................................................................................3-7
3.5: Setup and Operation ............................................................................3-7
3.5.1: Input Connections.......................................................................3-7
3.5.2: Initial Turn On ............................................................................3-9
3.5.2.1: DM8-R Digital Modulator Tray LEDs on Front Panel ................3-9
3.5.2.2: IF Processor Module LEDs on Front Panel..............................3-9
3.5.2.3: LO/Upconverter Module LEDs on Front Panel.........................3-9
3.5.2.4: Controller Module LEDs on Front Panel .................................3-9
3.5.2.5: Driver Module LEDs on Front Panel ......................................3-9
3.5.3: Front Panel Screens for the Driver/Amplifier Chassis Assembly ......3-10
3.5.4: Operational Procedure ...............................................................3-17
CHAPTER 4: CIRCUIT DESCRIPTIONS
4.1: IF Processor Module .............................................................................4-1
4.1.1: IF Processor Board......................................................................4-1
4.1.1.1: DM8 Modulator Selected .....................................................4-1
4.1.1.2: External Modulated IF Selected ...........................................4-1
4.1.1.3: Main IF Signal Path (Part 1 of 3)..........................................4-1
4.1.1.4: Input Level Detector Circuit ................................................4-2
4.1.1.5: Pin Diode Attenuator Circuit................................................4-3
4.1.1.6: Main IF Signal Path (Part 2 of 3)..........................................4-3