UBS Axcera 837B-5 5000-Watt UHF Translator User Manual 315942

UBS-Axcera 5000-Watt UHF Translator 315942

Table of Contents

4-6 kW UHF Translator Table of Contents 837B, Rev. 0 i February 24, 2003 TABLE OF CONTENTS CHAPTER 1 INTRODUCTION Section # Page # 1.1 Manual Overview................................................................................. 1-1 1.2 Assembly Designators .......................................................................... 1-1 1.3 Safety................................................................................................ 1-1 1.4 Maintenance ....................................................................................... 1-2 1.5 Material Return Procedure .................................................................... 1-2 1.6 Warranty for Axcera Products – Limited One-Year Warranty...................... 1-3 1.6 Introduction Material............................................................................ 1-4 CHAPTER 2 SYSTEM DESCRIPTION 2.1 System Overview ................................................................................ 2-1 2.1.1 UHF Exciter Assembly ................................................................. 2-1 2.1.2 2-3 kW Amplifier Arrays .............................................................. 2-2 2.1.2.1 (Optional) External Exhaust Kit ................................................. 2-4 2.1.3 Transmitter Output Assemblies .................................................... 2-4 2.2 Control and Status............................................................................... 2-5 2.2.1 UHF Exciter Tray ........................................................................ 2-6 2.2.2 UHF Amplifier Trays, LDMOS........................................................ 2-8 2.3 Input and Remote Connections ............................................................. 2-9 2.4 Main AC Input ....................................................................................2-13 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........................................................... 3-6 3.3.1 AC Connection to the UHF Exciter Cabinet ..................................... 3-6 3.3.2 AC Connection to the Amplifier Cabinets........................................ 3-6 3.3.2 AC Connection to the Amplifier Cabinets........................................ 3-6 3.3.2.1 Three Phase AC Connection to the Amplifier Cabinets ................... 3-6 3.3.2.2 Single Phase AC Connection to the Amplifier Cabinets .................. 3-7 3.3.3 Output Connections .................................................................... 3-7 3.4 Setup and Operation............................................................................ 3-8 CHAPTER 4 CIRCUIT DESCRIPTIONS 4.0 UHF Exciter Assembly .......................................................................... 4-1 4.0.1 Control and Status...................................................................... 4-1 4.0.2 RF, Baseband Input and Remote Connections ................................ 4-1 4.0.3 AC Input ................................................................................... 4-2 4.1 UHF/VHF Receiver Tray ........................................................................ 4-2 4.1.1 (A7) Filter.................................................................................. 4-3 4.1.2 Dual Stage Amplifier Assembly..................................................... 4-3 4.1.3 (A9) Channel Filter ..................................................................... 4-3 4.1.4 Downconverter Amplifier Assembly ............................................... 4-3 4.1.5 Channel Oscillator Assembly ........................................................ 4-3 4.1.6 (A5-A1) Multiplier Board.............................................................. 4-4 4.1.7 (A6) LO Filter............................................................................. 4-4 4.1.8 IF Filter/ALC Board ..................................................................... 4-4
4-6 kW UHF Translator Table of Contents 837B, Rev. 0 ii February 24, 2003 TABLE OF CONTENTS (continued) Section # Page # 4.1.9 (Optional) SAW Filter/Amplifier Board ........................................... 4-4 4.1.10 (Optional) IF Amplifier Board...................................................... 4-5 4.1.11 (Optional) IF Filter/Limiter Board ................................................ 4-5 4.1.12 (Optional) IF PLL Board ............................................................. 4-5 4.1.13 (Optional) IF Carrier Oven Oscillator Board .................................. 4-5 4.1.14 +12V(3A)/-12V Power Supply Board ........................................... 4-6 4.2 UHF Exciter ........................................................................................ 4-6 4.2.1 (Optional) Aural IF Synthesizer Board, 4.5 MHz.............................. 4-6 4.2.2 (Optional) Sync Tip Clamp/Modulator Board................................... 4-8 4.2.3 (Optional) Delay Equalizer Board .................................................4-11 4.2.4 (Optional) IF Carrier Oven Oscillator Board ...................................4-12 4.2.5 ALC Board, NTSC.......................................................................4-13 4.2.6 IF Phase Corrector Board............................................................4-19 4.2.7 Transmitter Control Board ..........................................................4-21 4.2.8 Channel Oscillator Assembly, Dual Oven.......................................4-26 4.2.9 (Optional) VCXO Assembly, Dual Oven .........................................4-26 4.2.10 (Optional) EEPROM FSK Identifier Board .....................................4-27 4.2.11 (Optional) Composite 4.5-MHz Filter Board .................................4-27 4.2.12 (Optional) 4.5-MHz Bandpass Filter Board...................................4-28 4.2.13 +12V(4A)/-12V(1A) Power Supply Board....................................4-29 4.2.14 x8 Multiplier Enclosure .............................................................4-29 4.2.15 x8 Multiplier Board...................................................................4-30 4.2.16 UHF Filters..............................................................................4-30 4.2.17 UHF Upconverter Board ............................................................4-30 4.2.18 Power Entry Module Assembly ...................................................4-32 4.3 Variable Gain/Phase Trays ...................................................................4-32 4.3.1 Variable Gain/Phase Board .........................................................4-32 4.3.2 Metering Board .........................................................................4-33 4.3.3 Power Entry Module Assembly.....................................................4-33 4.3.4 +15V/-12V Power Supply Board ..................................................4-33 4.4 Metering Panel ...................................................................................4-33 4.4.1 Splitter Board ...........................................................................4-34 4.4.2 Visual/Aural Metering Board........................................................4-34 4.4.3 Dual Peak Detectors ..................................................................4-34 4.4.4 Detector Threshold Board ...........................................................4-34 4.4.5 Power Entry Module Assembly.....................................................4-35 4.4.6 ±12V Power Supply Board ..........................................................4-35 4.5 AC Distribution Assembly.....................................................................4-36 4.6 2-3 kW Amplifier Arrays ......................................................................4-36 Main AC............................................................................................4-37 4.7 UHF Amplifier Trays, LDMOS ................................................................4-38 4.7.1 Variable Gain/Phase Board Enclosure ...........................................4-38 4.7.2 Variable Gain/Phase Board .........................................................4-39 4.7.3 1-Watt Amplifier Board Assembly ................................................4-40
4-6 kW UHF Translator Table of Contents 837B, Rev. 0 iii February 24, 2003 TABLE OF CONTENTS (continued) Section # Page # 4.7.4 1-Watt Amplifier Board...............................................................4-40 4.7.5 UHF Filter .................................................................................4-40 4.7.6 40 Watt UHF Amplifier Assembly .................................................4-40 4.7.7 Coupler Board Assembly.............................................................4-41 4.7.8 LDMOS Amplifier Assembly .........................................................4-41 4.7.9 4-Way Splitter Assembly ............................................................4-41 4.7.10 LDMOS Amplifier Assemblies .....................................................4-42 4.7.11 4-Way Combiner Assembly .......................................................4-42 4.7.12 Dual Peak Detector Enclosure....................................................4-43 4.7.13 Dual Peak Detector Board .........................................................4-43 4.7.14 Amplifier Protection Board ........................................................4-43 4.7.15 Amplifier Control Board ............................................................4-44 4.8 (Optional) External Exhaust Kit ............................................................4-46 4.9 Translator Output Assemblies...............................................................4-47 CHAPTER 5 DETAILED ALIGNMENT PROCEDURES 5.0 UHF/VHF Receiver Tray ........................................................................ 5-1 5.0.1 (A7) UHF Filter ........................................................................... 5-1 5.0.2 Dual Stage Amplifier Board .......................................................... 5-1 5.0.3 (A9) UHF Filter ........................................................................... 5-1 5.0.4 Channel Oscillator Assembly ........................................................ 5-2 5.0.5 Multiplier Board.......................................................................... 5-2 5.0.6 (A6) UHF Filter ........................................................................... 5-3 5.0.7 Downconverter/Amplifier Board.................................................... 5-3 5.0.8 IF Filter/ALC Board ..................................................................... 5-3 5.0.9 (Optional) SAW Filter/Amplifier Board ........................................... 5-4 5.0.10 ±12V Power Supply Board ......................................................... 5-4 5.0.11 (Optional) IF Carrier Oscillator Board .......................................... 5-4 5.0.12 (Optional) IF Filter/Limiter Board ................................................ 5-4 5.0.13 (Optional) IF PLL Board ............................................................. 5-4 5.0.14 (Optional) IF Amplifier Board...................................................... 5-4 5.1 Exciter Tray with (Optional) Baseband Video and Audio Inputs ................. 5-5 5.2 Exciter Tray with (Optional) 4.5-MHz Composite Input Kit........................ 5-5 5.3 Exciter Tray with Receiver Tray, Baseband or 4.5-MHz Composite Input .... 5-6 5.3.1 (Optional) Delay Equalizer Board .................................................. 5-6 5.3.2 (Optional) Composite 4.5-MHz Filter Board .................................... 5-7 5.3.3 (Optional) 4.5-MHz Bandpass Filter Board ..................................... 5-7 5.3.4 (Optional) IF Carrier Oscillator Board ............................................ 5-7 5.3.5 (Optional) Sync Tip Clamp/Modulator Board................................... 5-7 5.3.6 (Optional) Aural IF Synthesizer Board, 4.5 MHz.............................. 5-9 5.3.7 ALC Board (Part 1 of 2) ..............................................................5-10 5.3.8 IF Phase Corrector Board............................................................5-11 5.3.9 ALC Board ................................................................................5-11 5.3.10 UHF Upconverter Board ............................................................5-12 5.3.11 Channel Oscillator Board...........................................................5-12 5.3.12 x8 Multiplier Board...................................................................5-12 5.3.13 +12 VDC (4A)/-12 VDC (1A) Power Supply Board........................5-13 5.3.14 Transmitter Control Board ........................................................5-13
4-6 kW UHF Translator Table of Contents 837B, Rev. 0 iv February 24, 2003 TABLE OF CONTENTS (continued) Section # Page # 5.4 UHF Amplifier Trays, LDMOS ...............................................................5-13 5.4.1 Variable Gain/Phase Board .........................................................5-13 5.4.2 1-Watt UHF Amplifier Board ........................................................5-13 5.4.3 UHF Filter .................................................................................5-14 5.4.4 40 Watt Amplifier Module ...........................................................5-14 5.4.5 Coupler Board Assembly.............................................................5-14 5.4.6 LDMOS Amplifier Module ............................................................5-14 5.4.7 4-Way Splitter Assembly ............................................................5-14 5.4.8 LDMOS Amplifier Modules...........................................................5-14 5.4.9 4-Way Combiner Assembly .........................................................5-14 5.4.10 Circulator ...............................................................................5-14 5.4.11 Dual Peak Detector Board, Single Supply ....................................5-14 5.4.12 Amplifier Protection Board ........................................................5-14 5.4.13 Amplifier Control Board ............................................................5-14 5.4.14 +32V/2000W Switching Power Supply........................................5-14 5.4.15 Calibration of Output Power and VSWR Cutback of Tray................5-15 5.5 Phase and Gain Adjustment of the UHF Amplifier Trays...........................5-15 5.6 Calibration of Side A & B Amplifier Arrays Forward Output Power .............5-16 5.7 Calibration of Side A & B Amplifier Arrays Reflected Output Power ...........5-17 5.8 Phase and Gain Adjustment for the entire Amplifier Array .......................5-17 5.9 Calibration of the Forward Output Power of the Translator ......................5-18 5.10 Calibration of the Reflected Output Power of the Translator ....................5-18 5.11 Calibration of the Reject Output Power of the Translator ........................5-18 5.12 IF Phase Corrector Adjustment for the Translator..................................5-19 5.13 Linearity Corrector Adjustment of the Translator...................................5-20 APPENDICES APPENDIX A SAMPLE LOG REPORT SHEET APPENDIX B TYPICAL OPERATIONAL READINGS APPENDIX C BLOCK DIAGRAM / INTERCONNECT DRAWINGS APPENDIX D SUBASSEMBLY DRAWINGS APPENDIX E 837B SYSTEM SPECIFICATIONS
4-6 kW UHF Translator Table of Contents 837B, Rev. 0 v February 24, 2003 LIST OF FIGURES Figure # Page # 3-1 1kW Minimum Ventilation Configuration .......................................... 3-4 3-2 Chassis Trak Cabinet Slides ........................................................... 3-6 3-3 Typical Rigid coax Reconnection Drawing......................................... 3-8 5-1 Waveform at TP2.......................................................................... 5-8
4-6 kW UHF Translator Table of Contents 837B, Rev. 0 vi February 24, 2003 LIST OF TABLES Table # Page # 2-1 UHF Exciter Assembly Trays and Assemblies .................................... 2-1 2-2 Amplifier Array Trays and Assemblies.............................................. 2-3 2-3 UHF Exciter Tray Meters ................................................................ 2-6 2-4 UHF Exciter Tray Switches ............................................................. 2-7 2-5 UHF Exciter Tray Fault Indicators.................................................... 2-7 2-6 UHF Exciter Tray Samples ............................................................. 2-8 2-7 UHF Amplifier Tray Meters ............................................................. 2-8 2-8 UHF Amplifier Tray Status Indicators............................................... 2-9 2-9 UHF Amplifier Tray Control Adjustments .......................................... 2-9 2-10 UHF Amplifier Tray Sample ............................................................ 2-9 2-11 UHF Exciter Assembly Remote Control Interface Connections to the A/V Input and Remote Interface Assembly........................2-10 2-12 2-3 kW Amplifier Array Remote Control Interface Connections to the A/V Input and Remote Interface Assembly........................2-12 4-1 Fuses, Idling Currents, and Voltage Settings for the Class AB Amplifier Devices .......................................................4-44

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