User's Manual - Crown Broadcast

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5.20 38–kHz Subcarrier SuppressionWith no modulation, but in the Stereo mode, the 38–kHz subcarrier, as indicated on an FMmodulation monitor, should be down at least 40 dB.5.21 Additional ChecksIn addition to the tests and adjustments mentioned in this section, the following checks ensurea complete performance appraisal of the transmitter:1. Perform a physical inspection, looking for visible damage and checking that the chassishardware and circuit boards are secure.2. Check the functionality of switches and processing control.3. Verify that all indicators function.4. Check the frequency synthesizer lock at 80 MHz and 110 MHz.5. Measure the AC line current with and without the carrier on.6. Perform a functional test of the SCA input, Monitor outputs, and the monitor and controlfunction at the 15–pin, D-sub connector.7. Test the functionality of the FSK circuit.8. Check the operation and timing of the automatic carrier-off circuitry associated with programfailure.9. Check all metering functions.10. Test ALC action with PA current overload, SWR, and PLL lock.NOTE:FCC type acceptance procedures call for testing the carrier frequency over the temperaturerange of 0–50 degrees centigrade, and at line voltages from 85% to 115% of rating. (SeeFCC Part 2.1055.)5-10 FM30/FM150/FM300 User’s <strong>Manual</strong>
Section 6—Reference DrawingsThe illustrations in this section may be useful for making adjustments,taking measurements, troubleshooting, or understanding the circuitry ofyour transmitter.Reference Drawings6-1
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Revision ControlRevisionPrint DateI
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Section 3-Operation 3-13.1 Initial
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Section 6-Reference Drawings 6-16.1
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1.1 Your TransmitterThe FM30, FM150
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1.2.1 Stand-AloneIn the standard co
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1.2.5 SatellatorOne additional opti
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Subcarrier Suppression50dB below ±
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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 70 and 71: 6.1 ViewsGainReduction/ExpansionInd
Page 72 and 73: Notes:6-4FM30/FM150/FM300 User’s
Page 74 and 75: 747455223344557766223344557766Board
Page 76 and 77: Board Layouts and SchematicsIllustr
Page 78 and 79: 232112123Board Layouts and Schemati
Page 80 and 81: Board Layouts and Schematics1 2 3 4
Page 82 and 83: 21122129876543219876543219876543219
Page 84 and 85: 6543211357924683211+8Board Layouts
Page 86 and 87: 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
Page 94 and 95: 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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