User's Manual

Digital UHF Transmitter Table of Contents
DT835A, Rev. 1 i July 23, 2003
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
Section Page
1.1 Manual Overview..................................................................................1-1
1.2 Safety .................................................................................................1-1
1.3 Maintenance ........................................................................................1-2
1.4 Material Return Procedure .....................................................................1-2
1.5 Limited One-Year Warranty for Axcera Products.......................................1-3
CHAPTER 2 SYSTEM DESCRIPTION AND CUSTOMER REMOTE CONNECTIONS
2.1 System Overview .................................................................................2-1
2.1.1 Single UHF Exciter Assembly ........................................................2-1
2.1.2 (Optional) 10 MHz Reference Distribution Amplifier Tray..................2-2
2.1.3 DM8-R Modulator Tray.................................................................2-2
2.1.4 Amplifier Array Assemblies...........................................................2-2
2.1.5 Transmitter Output Assemblies.....................................................2-3
2.1.6 Control and Status ......................................................................2-3
2.1.7 Metering Panel ............................................................................2-4
2.1.8 UHF Exciter Tray .........................................................................2-5
2.1.9 Variable Gain/Phase Tray .............................................................2-6
2.1.10 UHF Amplifier Tray .....................................................................2-6
2.1.11 Modulator front panel menus and indicators ..................................2-7
2.1.12 Main AC Input ............................................................................2-8
2.1.13 Customer Remote Interface Connections.............................. 2-8
CHAPTER 3 INSTALLATION AND SETUP PROCEDURES
3.1 Site Considerations................................................................................3-1
3.2 Unpacking the Cabinets and Trays...........................................................3-4
3.3 Installing the Cabinets and Trays ............................................................3-4
3.3.1 DM8-R Modulator Installation ........................................................3-5
3.4 Main AC Inputs......................................................................................3-6
3.5 Output Connections ...............................................................................3-6
3.6 Setup and Operation Procedures .............................................................3-7
3.6.1 DM8-R Modulator Setup Procedures ...............................................3-8
CHAPTER 4 CIRCUIT DESCRIPTIONS
4.1 UHF Exciter Assembly ............................................................................4-1
4.1.1 Control and Status .......................................................................4-1
4.1.2 Digital Input and Remote Connections............................................4-1
4.1.3 AC Input .....................................................................................4-2
4.2 DM8-R Modulator Tray ...........................................................................4-2
4.2.1 DM8 Digital Modulator Board .........................................................4-2
4.2.2 DM8-R Front Panel Board..............................................................4-3
4.3 UHF Exciter Tray ..................................................................................4-3
4.3.1 UHF Filter ...................................................................................4-3
4.3.2 UHF Generator Board...................................................................4-4
4.3.3 (Optional) 10-MHz Reference Oscillator Board ................................4-4