FM250 BROADCAST TRANSMITTER - Crown Broadcast
FM250 BROADCAST TRANSMITTER - Crown Broadcast
FM250 BROADCAST TRANSMITTER - Crown Broadcast
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High-6-12-18Low2Expand2Compress1020RF PowerSWRALCPA DC VoltsPA DC AmpsPA TemperatureSupply DC VoltsVoltmeterSWRLockInputPA DCPA TempOver1009080706050403020PilotFM <strong>BROADCAST</strong> <strong>TRANSMITTER</strong>OFFGeneralGainReduction/ExpansionIndicatorsDigital MultimeterInnovative Technology for <strong>Broadcast</strong> ConfidenceModulationIndicatorsMultimeter SelectCarrier SwitchSpecificationsFrequency Range……………………………………………………………….. 87 to 108 MHz (75 to 90 MHz Option Available)RF Power………………………………………………………………………. 20 to 250 watts with front panel adjustmentRF Output Impedance………………………………………………………….. 50 Ohms unbalancedVSWR…………………………………………………………………………. 1.7:1 Maximum with automatic fold-back at higher VSWRFrequency Stability……………………………………………………………. Better than +/-250 Hz over operating temperature rangeModulation Type………………………………………………………………. Direct Frequency Modulation of CarrierModulation Capability…………………………………………………………. +/- 75 KHzModulation Indication………………………………………………………….. LED Indicators with Peak indicatorsFM S/N Ratio (FM Noise)……………………………………………………… Better than 60 dB (70 to 80 dB typical)Asynchronous AM S/N Ratio………………………………………………….. Better than 55 dB with 100% modulation @ 400 Hz, no de-emphasis, noFM modulation (typically > 60 dB)Synchronous AM S/N Ratio……………………………………………………. Better than 55 dB with 100% modulation @ 400 Hz, no de-emphasis, FMmodulation = 75 KHz @ 400 Hz (typically > 60 dB)RF Harmonics/Spurious Products……………………………………………… Better than -70 dB (-80 dB typical)RF Bandwidth………………………………………………………………….. +/-120 KHz, better than -35 dB; +/-240 KHz, better than -45 dBOperating Environment………………………………………………………… Temperature: 0 to 50 degrees CHumidity: 0 to 80% @ 20 degrees C (non-condensing)Maximum Altitude: 3000 metersAC Power……………………………………………………………………….. 100 to 120 or 220 to 240 volts AC +/-10%, 50 to 60 HzPower Factor……………………………………………………………………. Greater than 97% (lagging)DC Power………………………………………………………………………. 36 to 62 Volts (62 Volts required for full output)Power Consumption…………………………………………………………….. 560 VA @ full RF power outputRegulatory Type Notification for FCC part 73 & 74……….………………… Meets FCC, DOC, and CCIR requirementsRF Output Connector…………………………………………………………. Standard Type N, 50 OhmChassis Dimensions…………………………………………………………… 5.25 x 16.5 x 17.5 inches (13.4 x 41.9 x 44.5 cm) exclusive of rackmounts, but inclusive of connectorsWeight…………………………………………………………………………. 35 pounds (15.9 Kg)Shipping weight = 41 pounds (18.6 Kg)RF Output RF Output MonitorCompositeInputAudio MonitorsAudio InputsAudio InputHigh BandWide Band+6 dB +12 dBStereoFaultModulationCarrierPower1SCA IN COMPOSITE IN MONITORRLREMOTE I/O2 3RIGHTLEFT/MONOInput GainProcessingMonoRF OutputFUSECIRCUITBREAKER+–BATTERY36 VDCAudio Processor Processing Control Stereo/Mono Relative RFInput LevelSwitchIndicators Input GainVoltage OutSwitchesFault IndicatorsPower SwitchAC Power InSCA InputsPower Amplifier Remote I/ODC CircuitBreakerDC Power InWide-band Composite OperationComposite Inputs……………………. 1Composite Input Level………………. 3.5 Vp-p for +/-75 KHz deviationComposite Total HarmonicDistortion + Noise……………………. Less than 0.05% from 50 Hz to 15 KHz(0.03 typical)Subcarrier Inputs…………………….. 3Subcarrier Input Level…………………3.5 Vp-p for 7.5 KHz deviationSubcarrier Amplitude Response……… +/-0.3 dB from 40 Hz to 100 KHzStereo Operation with Built-in Audio Processor & Stereo GeneratorMonaural Operation with Built-inAudio ProcessorAudio Input Impedance……………… 50 Kohms bridging, balancedAudio Input Level…………………… -10 dBm to +10 dBm selectablefor 75 KHz deviation @ 400 HzAudio Frequency Response…………. Conforms to 75 uS pre-emphasiscurve for +/-0.25 dB from 50 Hzto 15 KHzPre-emphasis...………………………. Selectable for 25, 50, 75 uS, or FlatAudio Input Impedance……………………………………………… 50 Kohms bridging, balancedAudio Input Level…………………………………………………… -10 dBm to +10 dBm selectable for 75 KHz deviation @ 400 HzFrequency Response…………………………………………………. +/-0.3 dB from 50 Hz to 10 KHz, +/-1.0 dB from 10 Hz to 15 KHzTotal Harmonic Distortion + Noise………………………………….. 0.4 % or less @ 15 KHz (0.2 typical)Stereo Separation……………………………………………………. Better than 40 dB from 50 Hz to 15 KHzLinear Cross Talk…………………………………………………… Main to Sub and Sub to Main, -40 dB or better from 50 Hz to 15 KHz38 KHz Subcarrier Suppression……………………………………… 50 dB below +/-75 KHz deviationPilot Stability…………………………………………………………. +/-0.5 Hz @ 9% modulationThe <strong>FM250</strong> complies with FCC part 73 and part 74 operation and has built in FSK keying for unattended operationC2001, IREC 25166 Leer Drive, P.O. Box 2000, Elkhart, IN 46515-2000 Printed in U.S.A.