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عنوان
MWJD300
گروه
فرستنده های موج متوسط
توضیحات
Technical Specifications of JAHAD Broadcast Transmitters
Model MWJD300
Configuration 288 AM Power Modules
Power Output (Rated) 300000 Watts, (Capable) 330000 Watts
Three preset power levels between 30000 and 330000
Watts are selectable.
RF Frequency Range 522 (KHz) to 1710 (KHz)
RF Termination Impedance 50 Ω Unbalanced
Audio Frequency Response +0.2 dB to -0.8 dB , 30 - 10000 Hz
Audio Harmonic Distortion Better than 1.2% @ 90% Modulation, 50-7500 Hz
Better than 1.5% @ 90% Modulation, 7500-10000 Hz
Modulation Capability 125% Positive Peak Modulation
Carrier Shift Not exceeding 1%
RF Harmonics 60 dB or more below 300 kW
Spurious Output 60 dB or more below 300 kW
Noise and Hum 60 dB or more below 100% modulation @ 300 kW
Audio Input 600 Ω active balanced +10 dBm nominal (adjustable
0-12dBm for 100% modulation)
Power Input High Voltage: 20000 Volts 50 Hz three -phase
(~600KW)
Low Voltage: 380 - 400 Volts 50 Hz three -phase 4-
Wire (~50KW)
Permissible Power Supply
Variation ±10% voltage, ±10% frequency, (output power is
compensated against input voltage variations)
Power Consumption 375 kW maximum at 300 kW, 0% modulation
563 kW maximum at 300 kW, 100% continuous sine
wave modulation
Power Factor 0.95 typical @ 300 kW
Overall Efficiency Better than 85%
Metering Forward power,
Reflected power,
DC input current and voltage,
Modulation Monitor
Monitoring Status of critical parameters
Protection VSWR,
RF Drive,
Over / under voltage,
Over current (on each power module and main input
dc current),
Over heating (on each power module and output
filter),
Line phase sequence,
Internal Lock,
External Lock
Ambient Temperature -10oC -- +45oC at sea level 12
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