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عنوان
MWJD1200
گروه
فرستنده های موج متوسط
توضیحات
Technical Specifications of JAHAD Broadcast Transmitters
Model MWJD1200
Configuration 1152 AM Power Modules
Power Output (Rated) 1000000 Watts, (Capable) 1200000 Watts
Three preset power levels between 100000 and
1200000 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 No exceeding 1%
RF Harmonics 60 dB or more below 1000 kW
Spurious Output 60 dB or more below 1000 kW
Noise and Hum 60 dB or more below 100% modulation @ 1000 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
(~2MW)
Low Voltage: 380 Volts 50 Hz three -phase 4-Wire
(~100KW)
Permissible Power Supply
Variation ±10% voltage, ±10% frequency, (output power is
compensated against input voltage variations)
Power Consumption 1250 kW maximum at 1000 kW, 0% modulation
1875 kW maximum at 1000 kW, 100% continuous
sine wave modulation
Power Factor 0.95 typical @ 1000 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 9
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