Outline
QPSK digital TV modulator adopts advanced digital signal processing technology, of which receiving port can directly use digital satellite receiver for receiving, thus fully complying DVB-S standard. Not only can it gain relatively high frequency spectrum usage ratio, having very strong anti-interference and relatively high price performance ratio, but also it can well comply analogue FM microwave equipment.
QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution coding, and pre-modulating baseband shaping processing, etc. all these contribute a high guarantee to the data transmitting performance.
QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution coding, and pre-modulating baseband shaping processing, etc. all these contribute a high guarantee to the data transmitting performance.
Features
• Interface comply with ASI standard
• Comply with DVB-SETS300-421 QPSK modulating standard
• Frequency output range 950-2150MHz(it can be set as users' needs)
• Out Interface to connect 10M oscillator
• Big input stream
• Support input system efficient rate real time detect display and alarm display
• Output level is adjustable from 0-20dB,0.5db/step through adjust the panel.
• Capacity stable and reliable, strong anti-jamming
• RF level output delay
• Adopt DDS, high stabilization of output frequency, narrow frequency step, low phase noise
Specifications
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Modulate mode
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QPSK
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Input port
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ASI standard
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Output port
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50Ω N head
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Input TS level
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(800±10)mV
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Frequency output range
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(1238~1278)MHz
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Output frequency adjustable step
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Wide:125KHz, narrow:5Hz
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10M oscillator input level
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≥10dBm
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Max Output level
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≥0dBm
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Output level adjustable range
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0~20dB(0.5 dB step)
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Symbol rate
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3~10MBauds
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FEC
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1/2,2/3,3/4,5/6,7/8 for random option
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Miscellaneous
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Dimension
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482mm×330mm×45mm
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Temperature
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0~45°C(work);-20~80°C(storage)
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Power
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110~220VAC±10%,50/60 Hz,25W
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Installation hole distance
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460mm
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