Outline
During the digital TV program broadcasting, QAM modulator mainly completes the QAM modulation and uplink frequency conversion of code stream for mulitilevel transmission and broadcasting
digital service.
QAM modulator mainly used in the head-end digital TV broadcasting, it is composed by two modules (QAM modulator and digital up-frequency conversation). Firstly, the QAM modulator module modulate the input serial or parallel TS stream to IF frequency, and then pass the up-frequency conversation module to frequency transform, into standard channel or supplement channel which meet demand. Finally mixed enter into CATV network, and received by the terminal STB.
Features
• Error correct encode compelety meet DVB-C standard
• Can be work under 16 QAM, 32QAM, 64QAM, 128QAM, 256QAM
• Input interface:ASI and SPI
• Input data rate:1.5-51Mbps
• Output data rate:2-56Mbps
• LCD screen display
• Real time inspectand display for the efficient TS stream
• Adaptable itself to filtering circuit design to ensure the excellent suppress capability out of band
Specifications
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Modulating mode
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16,32,64,128,256 QAM
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Symbol rate
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3-7Mbaud/s
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Correction coding
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RS Coding188/204
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Input data rate
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1.5-51Mbps
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Channel data rate
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20-56Mbps
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MBR
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>33dB
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BER
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0
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Input interface
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ASI
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DVB standard
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SPI
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||
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Output
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IF Frequency
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36/36.15/36.65/44/70MHz(Optional)
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RF Frequency
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47-870Mhz
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Output Level
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≥115dBμV
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Output Level adjustable
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0-16dB(0.5dB stepping)
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Impedance
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75Ω
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Output return loss
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≥12dB
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Miscellaneous
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Dimension
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44mmx482mmx410mm
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Temperature
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0-45°C(Operating) -20-80°C(Storage)
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Power
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70-220VAC±10%,50Hz, 25W
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