UBS-Axcera LHV60ATD Manual Do Utilizador
Digital VHF HB Driver/Transmitter
Table of Contents
w/Axciter Modulator
LX Series, Digital, Rev. 0
November 15, 2007
ii
TABLE OF CONTENTS - (Continued)
SECTION
PAGE
4.1.4 Switching Power Supply Assembly..................................................4-4
4.2 Driver Power Amplifier Module Assembly, VHF, DTV ..................................4-4
4.2.1 25 Watt VHF Pallet Assembly.........................................................4-5
4.2.2 200 Watt VHF Amplifier Pallet Assembly .........................................4-5
4.2.3 Coupler Board Assembly ...............................................................4-5
4.2.4 VHF Amplifier Control Board ..........................................................4-5
4.2.4.1 Schematic Page 1................................................................4-6
4.2.4.2 Schematic Page 2................................................................4-6
4.2.4.3 Schematic PG 2, Current Monitoring Sections of the Board ......4-7
4.2.4.4 Schematic Page 3................................................................4-7
4.3 Power Amplifier Module Assembly, DTV/DVB, VHF ....................................4-8
4.3.1 25 Watt VHF Pallet Assembly.........................................................4-8
4.3.2 200 Watt VHF Amplifier Pallet Assembly .........................................4-8
4.3.3 Coupler Board Assembly ...............................................................4-8
4.3.4 VHF, DVB Amplifier Control Board ..................................................4-8
4.3.4.1 Schematic Page 1................................................................4-9
4.3.4.2 Schematic Page 2................................................................4-9
4.3.4.3 Schematic PG 2, Current Monitoring Sections of the Board ....4-10
4.3.4.4 Schematic Page 3..............................................................4-10
CHAPTER 5 DETAILED ALIGNMENT PROCEDURES
5.1 System Preparation ...............................................................................5-1
5.1.1 Module Replacement.....................................................................5-1
5.2 Initial Test Set Up of the Transmitter .......................................................5-1
5.3 Setting Up the Output Power of the Transmitter using Axciter ....................5-2
5.3.1 Adjusting Forward Power Readings.................................................5-2
5.3.2 Setting Up of AGC ........................................................................5-2
5.3.2.1 Setting Up of AGC 1 ............................................................5-2
5.3.2.2 Setting Up of AGC 2 ............................................................5-3
5.3.3 Setting Up of Overdrive Threshold..................................................5-3
5.3.4 Axciter Relay Sample Values .........................................................5-3
5.3.5 Upconverter/Downconverter Adjustment ........................................5-4
5.4 System Calibration of Forward & Reflected w/Driver/Amplifier LCD Display..5-4
5.4.1 Forward Power Calibration.............................................................5-4
5.4.2 Reflected Power Calibration ...........................................................5-4
APPENDIX
APPENDIX A DRAWINGS
APPENDIX B SPECIFICATIONS