Crown FM300 Manuals

Manuals and User Guides for Crown FM300. We have 1 Crown FM300 manual available for free PDF download: User Manual

Crown FM300 User Manual

Crown FM300 User Manual (110 pages)

Broadcast transmitter

Brand: Crown | Category: Transmitter | Size: 3.36 MB

Table of Contents

Important Notices
2
Table of Contents
3
Section 1-Getting Acquainted

7
- Your Transmitter
  8
- Applications and Options
  9
- Stand Alone
  10
- Backup
  10
- Exciter
  10
- Translator
  11
- Satellator
  12
- Nearcasting
  12
- Transmitter/Exciter Specifications
  13
- Receiver Specifications
  16
- Safety Considerations
  16
- Dangers
  16
- Warnings
  16
- Cautions
  16
Section 2-Installation

17
- Operating Environment
  18
- Power Connections
  18
- AC Line Voltage Setting
  18
- Fuses
  20
- Battery Power
  21
- Frequency (Channel) Selection
  21
- Modulation Compensator
  23
- Receiver Frequency Selection
  24
- RF Connections
  28
- Audio Input Connections
  29
- SCA Input Connections
  30
- Composite Input Connection
  30
- Audio Monitor Connections
  31
- Pre-Emphasis Selection
  31
- Program Input Fault Time-Out
  32
- Remote I/O Connector
  32
Section 3-Operation

35
- Initial Power-Up Procedures
  36
- Power Switches
  38
- DC Breaker
  38
- Power Switch
  38
- Carrier Switch
  38
- Front Panel Bar-Dot Displays
  39
- Audio Processor Input
  39
- Highband and Wideband Display
  39
- Modulation Display
  39
- Input Gain Switches
  40
- Processing Control
  40
- Stereo-Mono Switch
  40
- RF Output Control
  41
- Digital Multimeter
  41
- Fault Indicators
  42
Section 4-Principals of Operation

43
- Part Numbering
  44
- Stereo Generator Circuit
  45
  - Stereo Generator Section
    46
  - Rf Exciter Circuit
    48
- Metering Circuit Board
  49
- Motherboard
  50
- Display Circuit Board
  52
- Voltage Regulator Circuit Board
  53
- Power Regulator Circuit Board
  54
- RF Driver/Amplifier (FM30)
  54
- RF Driver (FM150/FM300)
  55
- RF Amplifier
  55
- Chassis
  56
- RF Output Filter & Reflectometer
  56
- Receiver Circuit Board Option
  57
Section 5-Adjustments and Tests

59
- Audio Processor Adjustments
  60
- Pre-Emphasis Selection
  60
- Pre-Emphasis Adjustment
  60
- Stereo Generator Adjustments
  60
- Separation
  60
- Composite Output
  61
- Using a Modulation Monitor
  61
- 19Khz Level
  61
- 19Khz Phase
  61
- Frequency Synthesizer Adjustments
  61
- Frequency (Channel) Selection
  61
- Modulation Compensator
  62
- Frequency Measurement and Adjustment
  62
- Metering Board Adjustments
  62
- Power Calibrate
  62
- Power Set
  62
- SWR Calibrate
  63
- PA Current Limit
  63
- Display Modulation Calibration
  63
- Voltage Regulator Adjustment
  64
- Bias Set (RF Power Amplifier)
  64
- Performance Verification
  65
- Audio Proof of Performance Measurements
  65
- De-Emphasis Input Network
  65
- Carrier Frequency
  66
- Output Power
  66
- RF Bandwidth and RF Harmonics
  66
- Pilot Frequency
  66
- Audio Frequency Response
  66
- Audio Distortion
  67
- Modulation Percentage
  67
- FM and am Noise
  67
- Stereo Separation
  67
- Crosstalk
  67
- Main Channel into Sub
  67
- Sub Channel into Main
  67
- 38Khz Subcarrier Suppression
  68
- Additional Checks
  68
  - Spare Parts
    96
  - Factory Service Instructions
    99
  - Transmitter Output Efficiency
    100

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