User's Manual

Digital UHF Transmitter Table of Contents
DT835A, Rev. 1 iii July 23, 2003
TABLE OF CONTENTS - (continued)
Section Page
CHAPTER 5 DETAILED ALIGNMENT PROCEDURES
5.1 DM8-R Modulator ..................................................................................5-1
5.1.1 DM8-R Modulator Board Configuration .........................................5-1
5.2 UHF Exciter Tray ...................................................................................5-2
5.2.1 Delay Equalization Adjustment......................................................5-3
5.2.2 IF Phase Corrector Adjustment .....................................................5-3
5.2.3 UHF Generator Board...................................................................5-3
5.2.4 10-MHz Reference Generator Board ..............................................5-4
5.2.5 PLL Board...................................................................................5-4
5.3 UHF Amplifier Trays...............................................................................5-4
5.3.1 Variable Gain/Phase Board ...........................................................5-4
5.3.2 1-Watt UHF Amplifier Board .........................................................5-4
5.3.3 UHF Filter ...................................................................................5-4
5.3.4 Single Stage Amplifier Assembly ...................................................5-4
5.3.5 Coupler Board.............................................................................5-4
5.3.6 Dual Stage Amplifier Assembly .....................................................5-5
5.3.7 4-Way Splitter Assembly..............................................................5-5
5.3.8 Dual Stage Amplifier Assembly .....................................................5-5
5.3.9 4-Way Combiner Assembly...........................................................5-6
5.3.10 Circulator...................................................................................5-6
5.3.11 Dual Peak Detector Board............................................................5-6
5.3.12 Amplifier Protection Board ...........................................................5-6
5.3.13 Amplifier Control Board ...............................................................5-6
5.3.14 Switching Power Supply ..............................................................5-6
5.3.15 Calibration of Output and Reflected Power and VSWR Cutback ........5-6
5.4 Phase and Gain Adjustment of the UHF Amplifier Trays in each Array..........5-7
5.5 Calibration of the Side A and Side B Arrays Forward Output Power .............5-7
5.6 Calibration of the Side A and Side B Arrays Reflected Output Power............5-7
5.7 Phase and Gain Adjustment for the entire Amplifier Array..........................5-8
5.8 Calibration of the Forward Output Power Level of the Transmitter...............5-8
5.9 Calibration of the Reflected Output Power Level of the Transmitter .............5-8
5.10 Calibration of the Reject Output Power Level of the Transmitter................5-9
APPENDICES
APPENDIX A SAMPLE LOG REPORT SHEET
APPENDIX B TYPICAL OPERATIONAL READINGS
APPENDIX C ASSEMBLY DRAWINGS AND PARTS LISTS
APPENDIX D SUBASSEMBLY DRAWINGS AND PARTS LISTS
APPENDIX E DT835A SYSTEM SPECIFICATIONS