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عنوان
MWJD50
گروه
فرستنده های موج متوسط
توضیحات
Technical Specifications of JAHAD Broadcast Transmitters
Model MWJD50
Configuration 48 AM Power Modules
Power Output (Rated) 50000 Watts, (Capable) 55000 Watts
Three preset power levels between 5000 and 55000
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 50 kW
Spurious Output 60 dB or more below 50 kW
Noise and Hum 60 dB or more below 100% modulation @ 50 kW
Audio Input 600 Ω active balanced +10 dBm nominal (adjustable
0-12dBm for 100% modulation)
Power Input 380 - 400 Volts 50 Hz three -phase 4-Wire
Permissible Power Supply
Variation ±10% voltage, ±10% frequency, (output power is
compensated against input voltage variations)
Power Consumption 64.9 kW maximum at 50 kW, 0% modulation
97.4 kW maximum at 50 kW, 100% continuous sine
wave modulation
Power Factor 0.95 typical @ 50 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 15
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