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

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Document ID	80247
Application ID	4c+HKm7jMl4rg9yoqQg3Tw==
Document Description	Table of contents
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Microsoft Word - pdf
Filesize	1.97kB (24577 bits)
Date Submitted	2000-01-10 00:00:00
Date Available	2000-04-03 00:00:00
Creation Date	2001-05-03 07:57:45
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-05-03 07:57:46
Document Title	Table of contents

100 Watt High Band VHF Transmitter
Table of Contents
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
1.1
1.2
1.3
1.4
1.5
Manual Overview ........................................................................................1-1
Safety .......................................................................................................1-1
Maintenance ..............................................................................................1-2
Material Return Procedure ...........................................................................1-2
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
3.2
3.3
3.4
Site Considerations .....................................................................................3-1
Unpacking the Cabinets and Trays................................................................3-4
Installation of the Trays Not Supplied With the Cabinet...................................3-5
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
420A, Rev. 0
100 Watt High Band VHF Transmitter
Table of Contents
TABLE OF CONTENTS (continued)
4.2.13
4.2.14
4.2.15
4.2.16
4.2.17
4.2.18
4.2.19
4.2.20
Filter/Mixer Board .......................................................................... 4-11
Filter/Amplifier Board, High Output.................................................. 4-12
High-Band Amplifier Boards ............................................................ 4-12
Frequency Adjustment of the High Band Amplifier Boards .................. 4-12
Overcurrent Protection Board.......................................................... 4-13
Visual/Aural Metering Board............................................................ 4-13
+12 VDC/-12 VDC Power Supply Board............................................ 4-13
Output Coupler Board .................................................................... 4-13
APPENDICES
APPENDIX A ASSEMBLY DRAWINGS
APPRNDIX B SUBASSEMBLY SCHEMATICS
420A, Rev. 0
ii
100 Watt High Band VHF Transmitter
Table of Contents
LIST OF FIGURES
3-1
3-2
3-3
1 kW Minimum Ventilation Configuration................................................3-4
Chassis Trak Cabinet Slides ..................................................................3-5
Cabinet Mounting Diagram ...................................................................3-6
4-1
Waveform...........................................................................................4-7
420A, Rev. 0
iii
100 Watt High Band VHF Transmitter
Table of Contents
LIST OF TABLES
2-1
2-2
2-3
2-4
2-5
2-6
2-7
Meters................................................................................................2-5
Switches.............................................................................................2-6
Adjustments .......................................................................................2-6
Control Indicators................................................................................2-7
Status Indicators .................................................................................2-7
Samples .............................................................................................2-7
Remote Interface Connections ..............................................................2-8
4-1
ALC Board LEDs ..................................................................................4-9
420A, Rev. 0
iv

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Page Count                      : 4

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