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Platinum HT EL 2000LS
Harris Platinum HT EL 2000LS Manuals
Manuals and User Guides for Harris Platinum HT EL 2000LS. We have
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Harris Platinum HT EL 2000LS manual available for free PDF download: 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
Equipment Required for Unloading
20
Unpacking, Equipment Inventory and Inspection
20
Factory Test Data Sheets
21
Cabinet Placement and Leveling
21
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
POWER SUPPLY FAULT DISPLAY and INTER- FACE 1A11A6
44
SUPPLIES 1A11A1 and 1A11A5
45
Logic Supply 1A11A3
45
Maintenance and Alignments
47
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
Power Supply Meter Calibration
49
PS CURRENT Calibration
49
PS VOLTS Calibration
49
Exciter RF Output Meter Calibration
49
Exciter Aural Power Calibration
49
Exciter Visual Power Calibration
49
Transmitter Aural Forward Power Calibration
50
Transmitter Aural Reflected Power Calibra
50
Transmitter Visual Forward Power Calibra
50
Transmitter Visual Reflected Power Calibra
50
VSWR Fault and Foldback Adjustments
50
AURAL HIGH VSWR Adjustment
50
Aural VSWR Foldback Adjustment
50
Initial Setup for Adjustment
50
Visual High VSWR Adjustment
50
Visual VSWR Foldback Adjustment
50
Visual Power Reduction
51
Aural AGC
51
Aural Power Reduction
51
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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