UBS Axcera LU1000AT 1000-Watt UHF Transmitter User Manual 379377

UBS-Axcera 1000-Watt UHF Transmitter 379377

Table of Contents Exciter

UHF Analog Driver/Transmitter Table of Contents LX Series, Rev. 0 October 31, 2003 iTABLE OF CONTENTS SECTION PAGE CHAPTER 1 INTRODUCTION 1.1 Manual Overview................................................................................. 1-1 1.2 Assembly Designation Numbers ............................................................ 1-1 1.3 Safety................................................................................................ 1-1 1.4 Maintenance ....................................................................................... 1-2 1.5 Material Return Procedure .................................................................... 1-2 1.6 Limited One-Year Warranty for Axcera Products ...................................... 1-3 CHAPTER 2 SYSTEM DESCRIPTION & REMOTE CONTROL CONNECTIONS 2.1 System Overview ............................................................................... 2-1 2.1.1 Modulator Module (not used in a translator system) ........................ 2-1 2.1.2 IF Processor Module.................................................................... 2-3 2.1.3 LO/Upconverter Module............................................................... 2-5 2.1.4 Control & Monitoring/Power Supply Module.................................... 2-7 2.1.5 Power Amplifier Module, 10-100W transmitter................................ 2-8 2.1.5.1 Driver Amplifier Module, used with high power transmitters .... 2-9 2.1.6 RF Output Assemblies ................................................................2-11 2.2 Control and Status..............................................................................2-11 2.2.1 Front Panel LCD Display Screen...................................................2-11 2.3 System Operation...............................................................................2-12 2.3.1 Principles of Operation ...............................................................2-12 2.4 Customer Remote Connections.............................................................2-14 CHAPTER 3 SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES 3.1 Site Considerations.............................................................................. 3-1 3.2 Unpacking the Chassis w/Modules, bandpass and trap filters..................... 3-4 3.3 Installing the Chassis w/Modules and filters ............................................ 3-4 3.4 AC Input ............................................................................................ 3-5 3.5 Setup and Operation............................................................................ 3-5 3.5.1 Input Connections ...................................................................... 3-5 3.5.2 Front Panel Screens for the Exciter/Amplifier Chassis Assembly ........ 3-7 3.5.3 Initial Turn On ..........................................................................3-14 CHAPTER 4 CIRCUIT DESCRIPTIONS 4.1 Modulator Module (not used in a translator system)................................. 4-1 4.1.1 Analog Modulator Board .............................................................. 4-1 4.2 IF Processor Module............................................................................. 4-6 4.2.1 IF Processor Board ..................................................................... 4-6 4.3 LO/Upconverter Module.......................................................................4-11 4.3.1 UHF Generator Board.................................................................4-12 4.3.2 UHF Filters................................................................................4-13 4.3.3 LO/Upconverter Board ...............................................................4-13 4.4 Control Monitoring/Power Supply Module...............................................4-17 4.4.1 Power Protection Board ..............................................................4-17 4.4.2 Control Board ...........................................................................4-18 4.4.3 Switch Board ............................................................................4-20 4.4.4 Switching Power Supply Assembly ...............................................4-20
UHF Analog Driver/Transmitter Table of Contents LX Series, Rev. 0 October 31, 2003 iiTABLE OF CONTENTS - (Continued) SECTION PAGE 4.5 Power Amplifier Module Assembly used in 10-100 Watt transmitters .........4-21 4.5.1 1-Watt Amplifier Module Assembly...............................................4-21 4.5.2 1-Watt UHF Amplifier Board ........................................................4-21 4.5.3 40-Watt UHF Amplifier Assembly .................................................4-21 4.5.4 UHF Module Assembly, RF Module Pallet .......................................4-22 4.5.5 Coupler Board Assembly.............................................................4-23 4.5.6 Amplifier Control Board ..............................................................4-23 4.5.7 Band-pass and Trap Filter...........................................................4-25 4.6 OR Driver Amplifier Module Assembly used in high power transmitters ......4-25 4.6.1 1-Watt Amplifier Module Assembly...............................................4-25 4.6.2 1-Watt UHF Amplifier Board ........................................................4-26 4.6.3 40-Watt UHF Amplifier Assembly .................................................4-26 4.6.4 Coupler Board Assembly.............................................................4-26 4.6.5 Amplifier Control Board ..............................................................4-27 CHAPTER 5 DETAILED ALIGNMENT PROCEDURES 5.1 Module Replacement............................................................................ 5-1 5.1.1 Initial Test Setup........................................................................ 5-1 5.2 LU Series Exciter/Amplifier Chassis Assembly.......................................... 5-2 5.2.1 Linearity Correction Adjustment ................................................... 5-3 5.2.2 Frequency Response Delay Equalization Adjustment ....................... 5-4 5.2.3 Calibration of Output Power and Reflected Power............................ 5-4 5.3 Alignment Procedure for the Bandpass Filter Assembly ............................. 5-5 APPENDICES APPENDIX A LX SERIES SPECIFICATIONS APPENDIX B DRAWINGS AND PARTS LISTS
UHF Analog Driver/Transmitter Table of Contents LX Series, Rev. 0 iiiLIST OF FIGURES FIGURE PAGE 3-1 1 kW Minimum Ventilation Configuration ......................................... 3-4 3-2 Front and Rear View Reconnection Drawing ..................................... 3-5 3-3 Rear View of LX Series Digital Transmitter ....................................... 3-6 4-1 40-Watt UHF Amplifier Module ......................................................4-22 4-2 UHF Amplifier Module, 250 Watts ..................................................4-23 4-3 40-Watt UHF Amplifier Module ......................................................4-27 5-1 Typical Red Field Spectrum............................................................ 5-4
UHF Analog Driver/Transmitter Table of Contents LX Series, Rev. 0 ivLIST OF TABLES TABLE PAGE 2-1 10-100W Analog LX Series Assemblies and Tray............................... 2-1 2-2 Modulator Front Panel Switch......................................................... 2-2 2-3 Modulator Front Panel Status Indicators .......................................... 2-2 2-4 Modulator Front Panel Control Adjustments...................................... 2-2 2-5 Modulator Front Panel Sample........................................................ 2-3 2-6 IF Processor Front Panel Switch...................................................... 2-4 2-7 IF Processor Front Panel Status Indicators ....................................... 2-4 2-8 IF Processor Front Panel Control Adjustments .................................. 2-4 2-9 IF Processor Front Panel Sample .................................................... 2-5 2-10 LO/Upconverter Front Panel Switch................................................. 2-6 2-11 LO/Upconverter Front Panel Status Indicators .................................. 2-6 2-12 LO/Upconverter Front Panel Control Adjustments ............................. 2-6 2-13 LO/Upconverter Front Panel Samples .............................................. 2-7 2-14 Controller/Power Supply Front Panel Display .................................... 2-7 2-15 Controller/Power Supply Front Panel Status Indicators ...................... 2-7 2-16 Controller/Power Supply Front Panel Control Adjustments.................. 2-7 2-17 Power Amplifier Front Panel Status Indicators .................................. 2-9 2-18 Power Amplifier Front Panel Control Adjustments.............................. 2-9 2-19 Power Amplifier Front Panel Sample................................................ 2-9 2-20 Driver Amplifier Front Panel Status Indicators .................................2-11 2-21 Driver Amplifier Front Panel Control Adjustments.............................2-11 2-22 Driver Amplifier Front Panel Sample...............................................2-11 2-23 UHF Television Frequencies...........................................................2-13 2-24 LX Series Chassis Customer Remote Connections ............................2-14 3-1 Rear Chassis Connections for LX Series Analog Transmitters .............. 3-6 3-2 Menu 01 Splash Screen #1 ............................................................ 3-7 3-3 Menu 02 Splash Screen #2 ............................................................ 3-7 3-4 Menu 10 Main Screen.................................................................... 3-7 3-5 Menu 11 Error List Screen ............................................................. 3-8 3-6 Menu 12 Transmitter Device Data Access Screen.............................. 3-8 3-7 Menu 13 Transmitter Configuration Access Screen ............................ 3-8 3-8 Menu 20 Error List Display Screen .................................................. 3-8 3-9 Menu 30 Transmitter Device Details Screen ..................................... 3-9 3-10 Menu 30-1 System Details Screens................................................. 3-9 3-11 Transmitter Device Parameters Detail Screens ................................. 3-9 3-12 Menu 40 Transmitter Set Up: Power Raise/Lower Screen ..................3-10 3-13 Menu 40-1 Transmitter Set Up: Model Select Screen........................3-10 3-14 Menu 40-2 Transmitter Set Up: Frequency Select Screen .................3-11 3-15 Menu 40-3 Transmitter Set Up: Frequency Table Select Screen .........3-11 3-16 Menu 40-4 Transmitter Set Up: IF Frequency Screen .......................3-11 3-17 Menu 40-5 Transmitter Set Up: Custom Frequency Select Screen......3-11 3-18 Menu 40-6 Transmitter Set Up: Xmtr. Set Up Serial Address Screen ..3-12 3-19 Menu 40-7 Transmitter Set Up: Station ID Screen ...........................3-12 3-20 Menu 40-8 Transmitter Set Up: System Visual Power Cal. Screen ......3-12 3-21 Menu 40-9 Transmitter Set Up: System Aural Power Cal. Screen .......3-12 3-22 Menu 40-10 Transmitter Set Up: System Rfltd. Power Cal. Screen .....3-13 3-23 Menu 40-11 Transmitter Set Up: Fwrd Pwr Fault Threshold Screen ....3-13 3-24 Menu 40-12 Transmitter Set Up: Refl Power Fault Threshold Screen ..3-13 3-25 Menu 40-13 Transmitter Set Up: Remote Commands Control Screen .3-13

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