UBS Axcera 420A Low Power Television User Manual Table of contents

UBS-Axcera Low Power Television Table of contents

Table of contents

100 Watt High Band VHF Transmitter Table of Contents420A, Rev. 0 iTABLE OF CONTENTSCHAPTER 1 INTRODUCTION1.1 Manual Overview........................................................................................1-11.2 Safety .......................................................................................................1-11.3 Maintenance ..............................................................................................1-21.4 Material Return Procedure ...........................................................................1-21.5 Warranty for Broadcast Products – Limited One-Year Warranty .......................1-3CHAPTER 2 SYSTEM DESCRIPTION2.1 420A System Overview...............................................................................2-12.1.1 Exciter Section..................................................................................2-12.1.2 Upconverter Section ..........................................................................2-22.1.3 Amplifier Section...............................................................................2-22.1.4 Bandpass Filter Assembly...................................................................2-32.1.5 Operational Voltages..........................................................................2-32.1.6 Configuration of the Power Entry Module AC Input ................................2-32.1.7 Control and Status.............................................................................2-42.1.8 Input and Remote Connections ...........................................................2-7CHAPTER 3 INSTALLATION AND SETUP PROCEDURES3.1 Site Considerations.....................................................................................3-13.2 Unpacking the Cabinets and Trays................................................................3-43.3 Installation of the Trays Not Supplied With the Cabinet...................................3-53.4 Setup and Operation Procedures ..................................................................3-7CHAPTER 4 DETAILED ALIGNMENT PROCEDURES4.1 Alignment of the 420A Transmitter...............................................................4-14.1.1 Baseband Section..............................................................................4-14.1.2 IF/Converter Section..........................................................................4-24.1.3 Amplifier Section of the Tray...............................................................4-24.1.4 Linearity Corrector Adjustment ...........................................................4-34.1.5 IF Phase Corrector Adjustment ...........................................................4-34.1.6 Calibration of the Output Power Level..................................................4-44.2 Board Level Alignment Procedures................................................................4-54.2.1 (Optional) 4.5 MHz Composite Input Kit...............................................4-54.2.2 Delay Equalizer Board........................................................................4-54.2.3 Composite 4.5 MHz Filter Board ..........................................................4-64.2.4 (Optional) 4.5 MHz Bandpass Filter Board ............................................4-54.2.5 IF Carrier Oven Oscillator Board..........................................................4-64.2.6 Sync Tip Clamp/Modulator Board ........................................................4-64.2.7 Aural IF Synthesizer Board, 4.5 MHz....................................................4-84.2.8 ALC Board (Part 1 of 2)......................................................................4-94.2.9 IF Phase Corrector Board .................................................................4-104.2.10 ALC Board, NTSC (Part 2 of 2) ........................................................4-104.2.11 Channel Oscillator Board ................................................................4-114.2.12 x4 Multiplier Board.........................................................................4-11
100 Watt High Band VHF Transmitter Table of Contents420A, Rev. 0 iiTABLE OF CONTENTS (continued)4.2.13 Filter/Mixer Board..........................................................................4-114.2.14 Filter/Amplifier Board, High Output..................................................4-124.2.15 High-Band Amplifier Boards............................................................4-124.2.16 Frequency Adjustment of the High Band Amplifier Boards ..................4-124.2.17 Overcurrent Protection Board..........................................................4-134.2.18 Visual/Aural Metering Board............................................................4-134.2.19 +12 VDC/-12 VDC Power Supply Board............................................4-134.2.20 Output Coupler Board ....................................................................4-13APPENDICESAPPENDIX A ASSEMBLY DRAWINGSAPPRNDIX B SUBASSEMBLY SCHEMATICS
100 Watt High Band VHF Transmitter Table of Contents420A, Rev. 0 iiiLIST OF FIGURES3-1 1 kW Minimum Ventilation Configuration................................................3-43-2 Chassis Trak Cabinet Slides ..................................................................3-53-3 Cabinet Mounting Diagram ...................................................................3-64-1 Waveform...........................................................................................4-7
100 Watt High Band VHF Transmitter Table of Contents420A, Rev. 0 ivLIST OF TABLES2-1 Meters................................................................................................2-52-2 Switches.............................................................................................2-62-3 Adjustments .......................................................................................2-62-4 Control Indicators................................................................................2-72-5 Status Indicators.................................................................................2-72-6 Samples .............................................................................................2-72-7 Remote Interface Connections ..............................................................2-84-1 ALC Board LEDs ..................................................................................4-9

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