User's Manual

350-Watt Digital VHF LB Transmitter Table of Contents
DT325B, Rev. 0 i September 12, 2008
TABLE OF CONTENTS
Section Page
CHAPTER 1 INTRODUCTION
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 Warranty for Axcera Products – Limited One-Year Warranty.......................1-3
CHAPTER 2 SYSTEM DESCRIPTION
2.1 System Overview ..................................................................................2-1
2.2 Exciter Driver Chassis Assembly Description.............................................2-1
2.2.1 Control & Monitoring Power Supply Module Assembly.......................2-2
2.2.2 Upconverter and Downconverter Module.........................................2-2
2.2.3 Adaptive Equalization Circuits........................................................2-3
2.3 VHF Low Band Amplifier Tray..................................................................2-3
2.4 Control and Status.................................................................................2-6
2.4.1 Front Panel Display Screen............................................................2-6
2.5 System Operation..................................................................................2-6
2.5.1 Principals of Operation..................................................................2-6
2.6 Maintenance .........................................................................................2-8
2.6 Module Replacement .......................................................................2-8
2.7 Customer Remote Connections ...............................................................2-9
CHAPTER 3 INSTALLATION AND SETUP PROCEDURES
3.1 Site Considerations................................................................................3-1
3.2 Unpacking and Installation of the Cabinet and Trays .................................3-4
3.3 Input and Output Connections to the Transmitter .....................................3-5
3.3.1 Main AC Connection to the Transmitter System ...............................3-5
3.3.2 Input Connections to the Transmitter System..................................3-5
3.4 Setup and Operation Procedures.............................................................3-7
3.4.1 Driver/Amplifier Modules front panel LEDs ......................................3-7
3.4.1.1 Axciter Upconverter Sled Module front panel LEDs..................3-8
3.4.1.2 Controller Module front panel LEDs .......................................3-8
3.4.2 Front Panel LCD Screen for Driver/Amplifier Chassis Assembly..........3-8
CHAPTER 4 CIRCUIT DESCRIPTIONS
4.1 Control Monitoring/Power Supply Module .................................................4-1
4.1.1 Power Protection Board.................................................................4-1
4.1.2 System Controller Board ...............................................................4-2
4.1.2.1 Schematic Sheet 1 ..............................................................4-2
4.1.2.2 Schematic Sheet 2 ..............................................................4-3
4.1.2.3 Schematic Sheet 3 ..............................................................4-3
4.1.2.4 Schematic Sheet 4 ..............................................................4-3
4.1.2.5 Schematic Sheet 5 ..............................................................4-4
4.1.3 LCD w/Switches Board..................................................................4-4
4.1.4 Switching Power Supply Assembly .................................................4-5
4.1.5 RF Output of Driver/Amplifier Chassis Assembly ..............................4-5