User Manuals: Broadcast Electronics FM-5T Transmitter

Manuals and User Guides for Broadcast Electronics FM-5T Transmitter. We have 1 Broadcast Electronics FM-5T Transmitter manual available for free PDF download: User Manual

Broadcast Electronics FM-5T User Manual (192 pages)

5 KILOWATT FM BROADCAST TRANSMITTERS

Brand: Broadcast Electronics | Category: Transmitter | Size: 4 MB

Important Information
2
Operating Hazards
3
High Voltage
3
Radio Frequency Radiation
3
Hot Surfaces
3
Introduction
4
Special Assembly
4
Installation
4
Transmitter Base Plate
4
Exciter Installation
5
Plate Choke Installation
5
High Voltage Transformer and Choke Installation
6
Rear Panel Connections
7
Table of Contents
8
List of Tables
10
List of Illustrations
11
General Information
12
Equipment Description
12
Transmitter Configurations
12
Equipment Specifications
13
Electrical Characteristics
13
Physical Characteristics
16
Unpacking
18
Environmental Requirements
18
Cooling Air Requirements
18
Primary AC Power
18
Equipment Placement
19
Component Installation
19
Acceptable AC Power Input Configurations
21
Remote Control
22
Remote Control Interfacing
23
Remote APC on Control
25
Remote Filament on Control
25
Remote High Voltage on Control
25
Remote High Voltage off Control
25
Remote Preset Power on Control
26
Remote Overload Reset Control
26
No Connection
26
APC on Indicator
26
Remote Overload Indicator
27
Remote Preset Power Indicator
27
Remote Failsafe Indicator
27
Remote Interlock Indicator
27
Wiring
28
Transformer Taps
28
Input Voltage Check
28
Optional Equipment Wiring
28
Transmitting Monitoring - Modem Connections
30
Transmitter Monitoring - Printer Connections
30
AC Power Connections
30
Initial Checkout
31
FM-5T Primary AC Wiring
32
Controller and Interlock Checkout
33
Blower Checkout
34
Exciter Checkout
35
Preliminary Operation and Tuning
35
Operation
39
Controls and Indicators
39
Turn on
39
Turn off
40
Tube Management Program
40
Indicator Checklist
46
Theory of Operation
47
Electrical Description
47
FM Exciter
47
Power Amplifier
47
Output Coupling
48
Plate Tuning
48
Neutralization
48
Second Harmonic Suppressor
48
Block Diagram
49
Automatic RF Output Level Control
50
VSWR Foldback Protection
50
Soft Start
50
Momentary Power Interruption
50
Metering
51
Exciter Metering
51
Power Supplies
51
Detailed Description
52
FM-5T Power Supply
52
Sequence of Operation
52
PA Plate Power Supply
52
PA Screen Grid Power Supply
53
PA Control Grid Power Supply
53
PA Filament Supply
53
Power Supply Simplified Schematic
54
PA Metering
59
Automatic Power Control
59
RF Circuit Simplified Schematic
60
PA Cavity
61
Maintenance
62
Safety Considerations
62
First Level Maintenance
63
Controller Battery
63
Air Filter
63
Blower Maintenance
64
Second Level Maintenance
64
PA Stage
64
Typical PA Efficiency Curve
65
AM Noise
66
Plate Current Meter Calibration
66
Synchronous am Noise
66
Asynchronous am Noise
66
Hum Null Control Location
67
Required Equipment
67
Second Harmonic Suppressor Coarse Setting
69
Neutralization Strap Coarse Setting
72
Transmitter Power Level Change
74
Transmitter Frequency Change Procedure
74
Troubleshooting
75
Coarse Tuning Adjustments
76
Typical Meter Indications
77
Typical Power Demand
77
Component Replacement on Circuit Boards
78
FM-5T Cabinet Component Locator, Front
80
Parts List
86
Drawings
100
Manufacturers Data
131
Replacement Parts
132
Magnetic Contactors
132
Technical Data
134
General Characteristics
134
Application
136
Mechanical
136
Electrical
136
Grid Operation
137
Screen Operation
137
Screen Current
137
Fault Protection
137
Typical Constant Current Characteristics
139
Extending Transmitter Tube Life
142
Headroom
142
Instrumentation
142
Transmitter Housekeeping
142
Filament Voltage Management
144
Transmitter Controller Theory of Operation
149
General Description
149
Functional Description
149
Transmitter Turn on
149
Transmitter Turn off
150
Remote Control Operation
150
Transmitter Controlled Block Diagram
151
Interlocks
152
Overload Operation
152
EMI I/O Circuit Board
152
AC Power Failure
153
Power Control Operation
153
Manual Power Control Operation
153
Automatic Power Control Operation
153
VSWR Foldback
154
Output Power Control
155
Preset Power
155
Controller Power Supply Module
155
Transmitter Controller Maintenance
156
Main Circuit Board Control Adjustments
156
Overload Controls
156
VSWR Overload Threshold Adjust
156
Plate Overload Adjustment
157
Controller Main Circuit Board Controls
158
Screen Overload Adjustment
159
Grid Overload Adjustment
160
Filament Warm-Up Adjustment
160
Cool-Down Adjustment
161
Recycle Adjustment
161
Warm-Up Defeat Adjustment
161
Forward Power Calibration
162
Output Power Meter Calibration
163
Reflected Power Calibration
163
AM Noise Test Receptacle Calibration
165
IPA Forward Power Calibration
165
Controller Reset
165
Customer Adjustments
165
Controller Component Locations
166
Main Circuit Board Power Supply Connector P5
166
Microprocessor Module
166
Power Supply Indicators
168

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User Manuals: Broadcast Electronics FM-5T Transmitter

Broadcast Electronics FM-5T User Manual (192 pages)

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