UBS Axcera 420A Low Power Television User Manual Table of contents
UBS-Axcera Low Power Television Table of contents
Contents
Table of contents
100 Watt High Band VHF Transmitter Table of Contents
420A, Rev. 0 i
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
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 Warranty for Broadcast Products – Limited One-Year Warranty .......................1-3
CHAPTER 2 SYSTEM DESCRIPTION
2.1 420A System Overview...............................................................................2-1
2.1.1 Exciter Section..................................................................................2-1
2.1.2 Upconverter Section ..........................................................................2-2
2.1.3 Amplifier Section...............................................................................2-2
2.1.4 Bandpass Filter Assembly...................................................................2-3
2.1.5 Operational Voltages..........................................................................2-3
2.1.6 Configuration of the Power Entry Module AC Input ................................2-3
2.1.7 Control and Status.............................................................................2-4
2.1.8 Input and Remote Connections ...........................................................2-7
CHAPTER 3 INSTALLATION AND SETUP PROCEDURES
3.1 Site Considerations.....................................................................................3-1
3.2 Unpacking the Cabinets and Trays................................................................3-4
3.3 Installation of the Trays Not Supplied With the Cabinet...................................3-5
3.4 Setup and Operation Procedures ..................................................................3-7
CHAPTER 4 DETAILED ALIGNMENT PROCEDURES
4.1 Alignment of the 420A Transmitter...............................................................4-1
4.1.1 Baseband Section..............................................................................4-1
4.1.2 IF/Converter Section..........................................................................4-2
4.1.3 Amplifier Section of the Tray...............................................................4-2
4.1.4 Linearity Corrector Adjustment ...........................................................4-3
4.1.5 IF Phase Corrector Adjustment ...........................................................4-3
4.1.6 Calibration of the Output Power Level..................................................4-4
4.2 Board Level Alignment Procedures................................................................4-5
4.2.1 (Optional) 4.5 MHz Composite Input Kit...............................................4-5
4.2.2 Delay Equalizer Board........................................................................4-5
4.2.3 Composite 4.5 MHz Filter Board ..........................................................4-6
4.2.4 (Optional) 4.5 MHz Bandpass Filter Board ............................................4-5
4.2.5 IF Carrier Oven Oscillator Board..........................................................4-6
4.2.6 Sync Tip Clamp/Modulator Board ........................................................4-6
4.2.7 Aural IF Synthesizer Board, 4.5 MHz....................................................4-8
4.2.8 ALC Board (Part 1 of 2)......................................................................4-9
4.2.9 IF Phase Corrector Board .................................................................4-10
4.2.10 ALC Board, NTSC (Part 2 of 2) ........................................................4-10
4.2.11 Channel Oscillator Board ................................................................4-11
4.2.12 x4 Multiplier Board.........................................................................4-11
100 Watt High Band VHF Transmitter Table of Contents
420A, Rev. 0 ii
TABLE OF CONTENTS (continued)
4.2.13 Filter/Mixer Board..........................................................................4-11
4.2.14 Filter/Amplifier Board, High Output..................................................4-12
4.2.15 High-Band Amplifier Boards............................................................4-12
4.2.16 Frequency Adjustment of the High Band Amplifier Boards ..................4-12
4.2.17 Overcurrent Protection Board..........................................................4-13
4.2.18 Visual/Aural Metering Board............................................................4-13
4.2.19 +12 VDC/-12 VDC Power Supply Board............................................4-13
4.2.20 Output Coupler Board ....................................................................4-13
APPENDICES
APPENDIX A ASSEMBLY DRAWINGS
APPRNDIX B SUBASSEMBLY SCHEMATICS
100 Watt High Band VHF Transmitter Table of Contents
420A, Rev. 0 iii
LIST OF FIGURES
3-1 1 kW Minimum Ventilation Configuration................................................3-4
3-2 Chassis Trak Cabinet Slides ..................................................................3-5
3-3 Cabinet Mounting Diagram ...................................................................3-6
4-1 Waveform...........................................................................................4-7
100 Watt High Band VHF Transmitter Table of Contents
420A, Rev. 0 iv
LIST OF TABLES
2-1 Meters................................................................................................2-5
2-2 Switches.............................................................................................2-6
2-3 Adjustments .......................................................................................2-6
2-4 Control Indicators................................................................................2-7
2-5 Status Indicators.................................................................................2-7
2-6 Samples .............................................................................................2-7
2-7 Remote Interface Connections ..............................................................2-8
4-1 ALC Board LEDs ..................................................................................4-9