User's Manual

3300-Watt VHF Low Band Transmitter Table of Contents
335B, Rev. 0 i Oct 4, 2007
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
SECTION PAGE
1.1 Manual Overview...................................................................................1-1
1.2 Assembly Designation Procedure.............................................................1-1
1.3 Safety ..................................................................................................1-1
1.4 Contact Information...............................................................................1-2
1.5 Material Return Procedure ......................................................................1-2
1.6 Limited One-Year Warranty for Axcera Products........................................1-3
CHAPTER 2 SYSTEM DESCRIPTION, MAINTENANCE & REMOTE CONTROL
CONNECTIONS
2.1 System Overview ..................................................................................2-1
2.2 Control and Status of Transmitter ...........................................................2-4
2.2.1 VHF Exciter Tray ..........................................................................2-5
2.2.2 VHF Amplifier Tray .......................................................................2-7
2.3 Maintenance .........................................................................................2-8
2.4 Input Connections .................................................................................2-9
2.5 Customer Remote Control Connections ............................................ 2-9
CHAPTER 3 INSTALLATION AND SETUP PROCEDURES
3.1 Site Considerations................................................................................3-1
3.2 Unpacking the Cabinet and Trays ............................................................3-4
3.3 Installing the Cabinet and Trays..............................................................3-5
3.4 Setup and Operation Procedures .............................................................3-6
CHAPTER 4 CIRCUIT DESCRIPTIONS
4.1 Low-Band VHF Exciter............................................................................4-1
4.1.1 Aural IF Synthesizer Board, 4.5 MHz ..............................................4-1
4.1.2 Sync Tip Clamp/Modulator Board ...................................................4-3
4.1.3 Delay Equalizer Board...................................................................4-6
4.1.4 IF Carrier Oven Oscillator Board.....................................................4-7
4.1.4.1 IF VCXO Board....................................................................4-8
4.1.5 ALC Board, NTSC .........................................................................4-9
4.1.6 IF Phase Corrector Board ............................................................4-15
4.1.7 VHF Mixer/Amplifier Enclosure Assembly.......................................4-17
4.1.7.1 x2 Multiplier Board ............................................................4-17
4.1.7.2 VHF Filter/Mixer Board.......................................................4-18
4.1.7.3 Low Band VHF Filter/Amplifier Board ...................................4-18
4.1.8 Transmitter Control Board...........................................................4-19
4.1.9 Visual/Aural Metering Board ........................................................4-24
4.1.10 Channel Oscillator Assembly, Dual Oven .....................................4-25
4.1.10.1 VCXO Channel Oscillator Assembly, Dual Oven ...................4-26
4.1.11 (Optional) EEPROM FSK Identifier Board .....................................4-26
4.1.12 (Optional) IF Attenuator Board...................................................4-27
4.2 VHF Low-Band Amplifier Trays ..............................................................4-27
4.3 3 Way Combiner Assembly ..................................................................4-31