User's Manual - Crown Broadcast

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Section 3-Operation 3-13.1 Initial Power-up Procedures 3-23.2 Power Switches 3-43.2.1 DC Breaker 3-43.2.2 Power Switch 3-43.2.3 Carrier Switch 3-43.3 Front Panel Bar-Dot Displays 3-53.3.1 Audio Processor Input 3-53.3.2 Highband and Wideband Display 3-53.3.3 Modulation Display 3-53.4 Input Gain Switches 3-63.5 Processing Control 3-63.6 Stereo-Mono Switch 3-63.7 RF Output Control 3-73.8 Digital Multimeter 3-73.9 Fault Indicators 3-8Section 4-Principals of Operation 4-14.1 Part Numbering 4-24.2 Audio Processor Circuit 4-34.3 Stereo Generator Circuit 4-44.4 RF Exciter Circuit Board 4-64.5 Metering Circuit Board 4-84.6 Motherboard 4-94.7 Display Circuit Board 4-104.8 Voltage Regulator Circuit Board 4-114.9 Power Regulator Circuit Board 4-124.10 RF Driver/Amplifier (FM30) 4-124.11 RF Driver (FM150/FM300) 4-134.12 RF Amplifier (FM150/FM300 4-134.13 Chassis 4-144.14 RF Output Filter & Reflectometer 4-144.15 Receiver Circuit Board Option 4-15iv
Section 5-Adjustments and Tests 5-15.1 Audio Processor Adjustments 5-25.1.1 Pre-Emphasis Selection 5-25.1.2 Pre-Emphasis Adjustment 5-25.2 Stereo Generator Adjustments 5-25.2.1 Separation 5-25.2.2 Composite Output 5-2Using a Modulation Monitor 5-35.2.3 19kHz Level 5-45.2.4 19kHz Phase 5-45.3 Frequency Synthesizer Adjustments 5-45.3.1 Frequency (Channel) Selection 5-45.3.2 Modulation Compensator 5-45.3.3 Frequency Measurement and Adjustment 5-45.3.4 FSK Balance Control 5-55.4 Metering Board Adjustments 5-55.4.1 Power Calibrate 5-55.4.2 Power Set 5-55.4.3 SWR Calibrate 5-55.4.4 PA Current Limit 5-65.5 Motherboard Adjustments 5-65.6 Display Modulation Calibration 5-65.7 Voltage Regulator Adjustment 5-65.8 Bias Set (RF Power Amplifier) 5-75.9 Performance Verification 5-75.9.1 Audio Proof of Performance Measurements 5-75.9.2 De-Emphasis Input Network 5-75.10 Carrier Frequency 5-85.11 Output Power 5-85.12 RF Bandwidth and RF Harmonics 5-85.13 Pilot Frequency 5-85.14 Audio Frequency Response 5-95.15 Audio Distortion 5-95.16 Modulation Percentage 5-95.17 FM and AM Noise 5-95.18 Stereo Separation 5-95.19 Crosstalk 5-95.19.1 Main Channel Into Sub 5-105.19.2 Sub Channel Into Main 5-105.20 38kHz Subcarrier Suppression 5-105.21 Additional Checks 5-10v
Page 2 and 3: Revision ControlRevisionPrint DateI
Page 6 and 7: Section 6-Reference Drawings 6-16.1
Page 8 and 9: 1.1 Your TransmitterThe FM30, FM150
Page 10 and 11: 1.2.1 Stand-AloneIn the standard co
Page 12 and 13: 1.2.5 SatellatorOne additional opti
Page 14 and 15: Subcarrier Suppression50dB below ±
Page 16 and 17: 1.4 Receiver SpecificationsMonaural
Page 18 and 19: 2.1 Operating EnvironmentYou can in
Page 20 and 21: 2.2.2 FusesThe fuse holders are loc
Page 22 and 23: 2. Use small flat blade screwdriver
Page 24 and 25: 2.4 Receiver Frequency SelectionIf
Page 26 and 27: Freq. 74-90 Freq. 88-108 SW1 SW2 Fr
Page 28 and 29: 2.5 RF ConnectionsConnect the RF lo
Page 30 and 31: 2.7 SCA Input ConnectionsYou can co
Page 32 and 33: 2.11 Program Input Fault Time-outYo
Page 34 and 35: Notes:2-18 FM30/FM150/FM300 User’
Page 36 and 37: 3.1 Initial Power-up ProceduresThes
Page 38 and 39: 3.2 Power Switches3.2.1 DC BreakerT
Page 40 and 41: 3.4 Input Gain SwitchesThe “+6 dB
Page 42 and 43: PA DC Volts—Supply voltage of the
Page 44 and 45: 4.1 Part NumberingAs this section r
Page 46 and 47: Q1 (Q2) is a recover/expansion gate
Page 48 and 49: 4.3 RF Exciter CircuitThis circuit
Page 50 and 51: 4.6 MotherboardThe motherboard is t
Page 52 and 53: 4.7 Display Circuit BoardThe front-
Page 54 and 55:
4.9 Power Regulator Circuit BoardTh
Page 56 and 57:
4.13 ChassisThe AC power supply com
Page 58 and 59:
When a stereo signal is present, LE
Page 60 and 61:
5.1 Audio Processor Adjustments5.1.
Page 62 and 63:
5.3.2 Modulation CompensatorRefer t
Page 64 and 65:
5.7 Voltage Regulator AdjustmentsJP
Page 66 and 67:
5.10 Carrier FrequencyCarrier frequ
Page 68 and 69:
5.20 38-kHz Subcarrier SuppressionW
Page 70 and 71:
6.1 ViewsGainReduction/ExpansionInd
Page 72 and 73:
Notes:6-4FM30/FM150/FM300 User’s
Page 74 and 75:
747455223344557766223344557766Board
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Board Layouts and SchematicsIllustr
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232112123Board Layouts and Schemati
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Board Layouts and Schematics1 2 3 4
Page 82 and 83:
21122129876543219876543219876543219
Page 84 and 85:
6543211357924683211+8Board Layouts
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Board Layouts and SchematicsF1 2 3
Page 88 and 89:
Board Layouts and Schematics1 2 3 4
Page 90 and 91:
Board Layouts and SchematicsEP1 2 3
Page 92 and 93:
Board Layouts and SchematicsF1 2 3
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321321tt97531864213123456xxxxxxxxx1
Page 96 and 97:
7.1 ServiceThe product warranty (se
Page 98 and 99:
The following lists describe the sp
Page 100 and 101:
AppendixTransmitter Output Efficien
Page 102 and 103:
Notes:A-3FM30/FM150/FM300 User’s
Page 104 and 105:
AFALCAMBandwidthBCDBFOBNCBroadbandC
Page 106 and 107:
RFSCAS/NSpurious productsStabilityS
Page 108 and 109:
DDC. See Power: inputDe-emphasis 2-
Page 110:
S (continued)Stand alonetransmitter
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User's Manual - Crown Broadcast

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