Crown FM150, User Manual

Page: 5 / 110

Section 5-Adjustments and Tests 5-1
5.1 Audio Processor Adjustments 5-2
5.1.1 Pre-Emphasis Selection 5-2
5.1.2 Pre-Emphasis Adjustment 5-2
5.2 Stereo Generator Adjustments 5-2
5.2.1 Separation 5-2
5.2.2 Composite Output 5-2
Using a Modulation Monitor 5-3
5.2.3 19kHz Level 5-4
5.2.4 19kHz Phase 5-4
5.3 Frequency Synthesizer Adjustments 5-4
5.3.1 Frequency (Channel) Selection 5-4
5.3.2 Modulation Compensator 5-4
5.3.3 Frequency Measurement and Adjustment 5-4
5.3.4 FSK Balance Control 5-5
5.4 Metering Board Adjustments 5-5
5.4.1 Power Calibrate 5-5
5.4.2 Power Set 5-5
5.4.3 SWR Calibrate 5-5
5.4.4 PA Current Limit 5-6
5.5 Motherboard Adjustments 5-6
5.6 Display Modulation Calibration 5-6
5.7 Voltage Regulator Adjustment 5-6
5.8 Bias Set (RF Power Amplifier) 5-7
5.9 Performance Verification 5-7
5.9.1 Audio Proof of Performance Measurements 5-7
5.9.2 De-Emphasis Input Network 5-7
5.10 Carrier Frequency 5-8
5.11 Output Power 5-8
5.12 RF Bandwidth and RF Harmonics 5-8
5.13 Pilot Frequency 5-8
5.14 Audio Frequency Response 5-9
5.15 Audio Distortion 5-9
5.16 Modulation Percentage 5-9
5.17 FM and AM Noise 5-9
5.18 Stereo Separation 5-9
5.19 Crosstalk 5-9
5.19.1 Main Channel Into Sub 5-10
5.19.2 Sub Channel Into Main 5-10
5.20 38kHz Subcarrier Suppression 5-10
5.21 Additional Checks 5-10
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