User's Manual

Digital UHF Transmitter Table of Contents
DT835A, Rev. 1 ii July 23, 2003
TABLE OF CONTENTS
CHAPTER 4 CIRCUIT DESCRIPTIONS - Continued
Section Page
4.3.4 PLL Board...................................................................................4-5
4.3.5 Power Entry Module.....................................................................4-7
4.3.6 IF Phase Corrector Board .............................................................4-7
4.3.7 ALC Board ..................................................................................4-9
4.3.8 Visual/Aural Metering Board .......................................................4-15
4.3.9 UHF Upconverter Board..............................................................4-16
4.3.10 Transmitter Control Board .........................................................4-17
4.3.11 +12V(4A)/-12V(1A) Power Supply Board ....................................4-22
4.3.12 5-Section Delay Equalizer Board ................................................4-23
4.4 Variable Phase/Gain Tray ....................................................................4-23
4.4.1 Variable Gain/Phase Board ..........................................................4-23
4.4.2 Metering Board ..........................................................................4-24
4.4.3 Power Entry Module....................................................................4-24
4.4.4 +15V/-12V Power Supply Board ..................................................4-24
4.5 Metering Panel ...................................................................................4-24
4.5.1 Splitter Board ............................................................................4-25
4.5.2 Visual/Aural Metering Board ........................................................4-25
4.5.3 Dual Peak Detectors ...................................................................4-25
4.5.4 Detector Threshold Board............................................................4-26
4.5.5 Power Entry Module....................................................................4-26
4.5.6 +/-12V Power Supply Board ........................................................4-26
4.6 AC Distribution Assembly, UHF Exciter..................................................4-27
4.7 2-3kW Amplifier Array.........................................................................4-27
4.8 UHF Amplifier Trays............................................................................4-29
4.8.1 UHF Filter .................................................................................4-29
4.8.2 1-Watt Amplifier Board Assembly................................................4-29
4.8.3 1-Watt Amplifier Board ..............................................................4-30
4.8.4 Single Stage Amplifier Assembly .................................................4-30
4.8.5 Coupler Board...........................................................................4-34
4.8.6 Dual Peak Detector Enclosure .....................................................4-34
4.8.7 Dual Peak Detector Board ..........................................................4-34
4.8.8 4-Way Splitter Assembly............................................................4-35
4.8.9 4-Way Splitter Board .................................................................4-35
4.8.10 Dual Stage Amplifier Assembly...................................................4-35
4.8.11 Amplifier Protection Board .........................................................4-39
4.8.12 Amplifier Control Board .............................................................4-40
4.8.13 Variable Gain/Phase Enclosure...................................................4-42
4.8.14 Variable Gain/Phase Board ........................................................4-42
4.8.15 4-Way Combiner Assembly........................................................4-43
4.9 AC Distribution Assembly, Single Phase Amplifier Array ..........................4-44
4.10 AC Distribution Assembly, Three Phase Amplifier Array..........................4-45
4.11 Combiner Reject Load Assembly..........................................................4-45
4.11.1 Combiner Reject Load Board......................................................4-46