UHF Analog Driver/Transmitter/Translator
Table of Contents
LX Series, Rev. 3
March 2, 2005
iii
TABLE OF CONTENTS - (Continued)
SECTION
PAGE
4.6 Exciter PA Module used in 10-100Watt Xmitters. or Drivers above 2kW .....4-19
4.6.1 1 Watt Amplifier Module Assembly ............................................4-20
4.6.2 1 Watt UHF Amplifier Board .....................................................4-20
4.6.3 40 Watt UHF Amplifier Assembly...............................................4-20
4.6.4 UHF Module Assembly, RF Module Pallet.....................................4-21
4.6.5 Coupler Board Assembly .........................................................4-21
4.6.6 Amplifier Control Board...........................................................4-22
4.6.6.1 Schematic Page 1..........................................................4-22
4.6.6.2 Schematic Page 2..........................................................4-22
4.6.6.3 Current Monitoring Sections of the Board ...........................4-23
4.6.6.4 Schematic Page 3 Aural, Visual. Aural Power Detectors .........4-23
4.6.7 Bandpass and Trap Filters .......................................................4-24
OR 4.7 Driver Amplifier Module Assembly used in 1kW or 2kW transmitters ....4-24
4.7.1 1-Watt Amplifier Module Assembly ............................................4-24
4.7.2 1-Watt UHF Amplifier Board .....................................................4-24
4.7.3 40 Watt UHF Amplifier Assembly...............................................4-26
OR 4.7.3.1 250 Watt UHF Amplifier Assembly ................................4-26
4.7.4 Coupler Board Assemb ly .........................................................4-26
4.7.5 Amplifier Control Board...........................................................4-26
4.7.5.1 Schematic Page 1..........................................................4-27
4.7.5.2 Schematic Page 2..........................................................4-27
4.7.5.3 Current Monitoring Sections of the Board ...........................4-28
4.7.5.4 Schematic Page 3 Aural, Visual. Aural Power Detectors .........4-28
CHAPTER 5 DETAILED ALIGNMENT PROCEDURES
5.1 Module Replacement........................................................................ 5-1
5.1.1 Initial Test Setup.................................................................... 5-1
5.2 LX Series Exciter/Amplifier Chassis Assembly ........................................ 5-2
5.2.1 (Optional) Receiver Module Assembly ......................................... 5-2
5.2.2 Modulator Module Assembly...................................................... 5-2
5.2.3 IF Processor Module Assembly .................................................. 5-3
5.2.4 VHF/UHF Upconverter Assembly ................................................ 5-4
5.2.5 Setting up the Drive Level of the Transmitter Procedure ................. 5-4
5.2.6 Changing the Transmitter Channel Procedure ............................... 5-4
5.2.7 Linearity Correction Adjustment ................................................ 5-5
5.2.8 Frequency Response Delay Equalization Adjustment ...................... 5-6
5.2.9 Calibration of Output Power & Reflected Power of Transmitter ......... 5-6
5.3 Bandpass Filter Assembly ................................................................. 5-7
5.4 UHF Trap Filter Assembly .................................................................. 5-8
5.4.1 Effects of Tuning the Output Trap Filter....................................... 5-9
APPENDICES
APPENDIX A LX SERIES SPECIFICATIONS
APPENDIX B LX SERIES DRAWINGS AND PARTS LISTS
APPENDIX C TRANSMITTER LOG SHEET
