Harris Platinum HT EL 2000LS Manuals

Manuals and User Guides for Harris Platinum HT EL 2000LS. We have 1 Harris Platinum HT EL 2000LS manual available for free PDF download: Technical Manual

Harris Platinum HT EL 2000LS Technical Manual

Harris Platinum HT EL 2000LS Technical Manual (90 pages)

Television transmitter

Brand: Harris | Category: Transmitter | Size: 1 MB

Table of Contents

Table of Contents
10
Section I

13
- Control and Monitoring
  13
- Cooling
  13
- Introduction
  13
  - General Description
    13
Introduction/Specifications

13
- Power Supplies
  13
- RF Amplifier Modules
  13
- RF Output System
  13
Installation

19
- Signal Flow through the System
  13
- Electrical Installation Planning
  19
  - Power Requirements
    19
  - Circuit Breaker Selection
    19
  - AC Mains Disconnect Location
    20
- Mechanical Installation Planning
  19
  - Space Requirements
    19
  - Approximate Shipping Weights
    19
  - RF System Layout
    19
  - Air System
    19
- Test Equipment Requirement Planning
  19
- Unloading and Unpacking
  20
- Electrical Installation
  22
  - Grounding
    22
  - Primary Wiring
    22
  - Setting Transformers Taps
    23
  - Input Signals
    23
  - Setup Jumpers
    23
  - Backup Battery
    23
  - RF Output Coax Connections
    23
  - Interlocks
    23
- Transmitter Check out
  23
  - Pre-Turn on Checks
    23
  - Initial Turn-On Sequence
    23
  - Module Installation
    23
  - Control System Check out
    24
  - Initial Application of RF Power
    24
  - Visual
    24
  - Aural
    24
- Remote Control Input and Output
  24
  - Command in 1A12J21
    24
  - 1A12J22: Status Outputs
    24
  - Status Functions 1A12J22
    25
  - Analog Outputs 1A12J23
    25
Sectioniii

35
Operation

35
- Controls and Indicators
  35
- Introduction
  35
- Local Turn-On and Turn-Off
  35
- Remote Control/Extended Operation
  35
  - Theory of Operation
    39
- Video Controlled Operation
  35
- Exciter, Meter and Control Board
  39
  - A/D & Displays
    39
  - Bar Graph Display
    39
  - Analog Multiplexers
    39
  - Meter Selector
    39
  - Loss of Video Delay Detector
    40
  - Override/Normal Selection
    40
  - Clock Circuits
    40
  - Battery (Bat) Supply Voltage
    40
  - Visual Power Control
    40
  - Aural Power Control
    40
  - Power up Reset
    40
  - Jp2 & Jp3
    40
  - Freq Unlock
    40
  - Vis_Clk_Gate U18 & Aur_Clk_Gate U19
    41
  - Functional Descriptions
    41
    
    METER_CLK_GATE U20 Functional de
    41
  - METER_SEL U17 Functional Descriptions
    41
    
    Vis_Up/Dwn_Pwr_Ctrl U26 & U27
    41
  - Visual DAC U25
    41
  - Visual Foldback Control
    41
  - Aur_Up/Dwn_Pwr_Ctrl U29 & U30
    41
- Introduction
  39
- System Overview
  39
- Interface Logic Module
  42
  - Peak Detectors
    42
  - Foldback Circuits
    42
  - High VSWR
    43
  - Command Input Logic PAL U8 (917-2321-004)
    43
    
    Xmtr Ctrl Pal U15
    43
    
    Air Fault
    44
- Ac Breakers
  44
  - Main Breaker
    44
  - Ac Control Breaker
    44
  - Logic Supply Breaker
    44
- Power Module 1A11
  44
- Introduction
  47
  - Section V
    47
- Preventive Maintenance
  47
  - Air Filter Maintenance
    47
  - Mov's
    48
  - Semiconductors
    48
    
    Capacitors
    48
    
    Fixed Resistors
    48
    
    Relays
    48
    
    Transformers
    48
- Station Records
  47
  - Transmitter Logbook
    47
  - Maintenance Logbook
    47
  - Safety Precautions
    47
- Adjustments
  48
- Performance Checks
  48
- RF Power Measurements
  48
  - Through-Line Meters
    48
  - Visual Peak-Sync to Average Power Conversion for
    49
- Transmitter Metering and Control Calibration
  49
- Component Replacement on Circuit Boards
  51
  - Troubleshooting
    53
- Introduction
  53
- Returns
  53
  - Parts List
    55
- Section VIII
  
  67
  - RF Amplifier Modules, Platinum Series
    67
- Appendix A
  
  67
  - Troubleshooting Assistance
    53
  - General Information
    67
    
    Factory Module Repair
    67
    
    Local Module Repair
    67
  - RF Amplifier Modules Theory of Operation
    67
    
    Driver Module, High Band
    68
    
    Driver Module, Low Band
    68
    
    Low Band Quarter Module
    70
    
    PA Module
    70
    
    RF Quarter Modules
    70
    
    High Band Quarter Module
    71
    
    Protection, Control and Monitor Subsystem
    71
    
    Quarter Module Bias
    71
    
    Module Status Leds
    72
    
    Red LED Fault Blink Codes
    72
  - Module Troubleshooting
    72
    
    Platinum™ TV Module Test Fixture (992-8556-002
    73
    
    Troubleshooting Based on Module Blink Codes
    73
    
    Troubleshooting Based on Module Swapping
    73
    
    Isolating Other Failures
    76
    
    DC Resistance Test
    77
    
    Idle Current Test
    77
    
    Locating Failed RF Fets
    77
  - Parts Replacement Procedures
    78
    
    Soldering Precautions
    78
    
    Quarter Module Replacement
    79
    
    RF FET Replacement
    79
    
    Pass FET Replacement
    80
    
    Testing and Replacing Isolation Resistors
    80
    
    Chip Cap Replacement
    81
  - Test Procedure Solid State TV Modules
    81
    
    Application of Drive
    81
    
    Gain Check
    81
    
    Idle Current Check
    81
    
    Initial Power up
    81
    
    Over/Under Voltage Check
    81
    
    Pre-Operational Checks
    81
    
    RF Testing
    81
    
    Alternate Method for Measurement under Program Conditions
    82
    
    ISO Volts Check
    82
    
    Overdrive Check
    82
    
    VSWR Check
    82
- Appendix B Air Conditioning Considerations
  
  87
  - Air Conditioning
    87
  - Heat Load Estimate Guide
    87
- Appendix C Surge and Lightning Protection and Grounding Consid
  
  89
  - Surge and Lightning Protection
    89
  - System Grounding
    89
    
    AC Ground
    89
    
    Ground Wires
    89
    
    DC Ground
    90
    
    Earth Ground
    90
    
    RF Ground
    90

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