Outline
DVB-T/H Modulator supports DVB-T/H standard channel coding and modulation parameters. A/V signals compressed and coded via MPEG-II and be multiplexed and processed together with other data stream, then send to DVB-T/H modulator. Modulator channel coding process is full according to DVB-T/H technical specifications and achieve energy proliferation, interweave, FEC coding, RS coding, symbol mapping, filter matching etc. After that modulated by COFDM and output IF. IF through built in up-converter generate the required RF output. Widely used for terrestrial digital television broadcasting, mobile data broadcast and digital broadband applications.
Main Feature
Meet EN300744 standard; support 6MHz/7MHz/8MHz band width
Error correction follows DVB-T standard
Operable in QPSK, 16QAM, 64QAM mode
Support 2K/8K carrier-wave operating mode
FEC encode supports 1/2、2/3、3/4、5/6 and 7/8
Secure time interval supports 1/4、1/8、1/16、1/32
Input interface: ASI and SPI（DS3/E3 optional）
Input bit rate::1.5～31.67Mbps
Output band width：6/7/8MHz
RF output：48～860MHz
Output level：105dBuV～115dBuV(step adjustable)
188 and 204 packet automatic identification; shows real-time data format
Adopt high capability buffer; ASI interface supports burst and equality TS, while re-construct equality TS.
Advance output TS efficiency
Capable of NIT mapping and sending; supports over 44 NIT mapping frequency
Holds 10 groups of PID filtering and re-mapping function
Support all PSI/SI data abstraction, modification and analysis
Capable of swiSVhing/inserting SI data
Null packet filtering and filling
Performs multiple PCR correction simultaneously
Monitor and test real-time enter/valid bit rate
Self-adjust filter circuit design in order guarantees superb SNR (out of band)
-20dB RF test output is available (IF output is also available)
Failure alarming
LCD display
With RJ45, actualize central NMS, distant upgrade/maintenance (NMS software is optional)
Power off memory
Technical Specification
Data Interface
ASI Interface (Asynchronous Serial interface)
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Input
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Connector
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BNC
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Impedance
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75Ω
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Packet format
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188 or 204 bits (without channel coding）
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Access data rate
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270Mbps
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Max valid bit rate
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31.67Mbps
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DVB standard
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supports burst and equality TS
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Loop output
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Connector
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BNC
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Impedance
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75Ω
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SPI input interface (Synchronous Parallel interface)
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Connector
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DB-25 female
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Packet format
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188 or 204 bits（without channel coding）
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DVB Standard
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LVDS
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IF interface
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IF input
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Connector
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BNC
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Impedance
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50Ω
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IF frequency
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36MHz/35.25/36.15/44MHz（optional）
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IF Bandwidth
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≤8MHz
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Reflect loss
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≥18dB
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Input level
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95dBuV(rms)
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IF loop output
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Connector
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BNC
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Impedance
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50Ω
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IF frequency
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36MHz/35.25/36.15/44MHz（ optional ）
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IF Bandwidth
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≤8MHz
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Reflect loss
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≥18dB
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Output level
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95dBuV(rms)
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RF interface
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RF output
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Connector
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BNC
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Impedance
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75Ω
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Output Frequency
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48MHz～860MHz（in segment）
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Reflect loss
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≥15dB
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Output level
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105dBuV～115dBuV(adjustable)
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Carrier rejection
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>55dB
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MER
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≥42dB
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SNR（out of band）
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≥50dB
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RF output for test
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Connector
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BNC
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Impedance
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75Ω
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Output level
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85dBuV～95dBuV(adjutable)
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Channel signal encoding
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Constellation
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QPSK，16QAM，64QAM
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Channel encoding
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RS encode, DVB standard
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FEC encoding
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1/2、2/3、3/4、5/6、7/8
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RS encoding
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204byte mode
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IFFT
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2K/8K
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Secure time interval
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1/4、1/8、1/16、1/32
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MER
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≥44dB
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SNR(out of band)
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≥50dB
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Network management interface
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ETHERNET
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IEEE802.3 ETHERNET, RJ45 interface
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Software protocol
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SNMP protocol
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Power supply
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Voltage
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165V～265VAC or 85V～265VAC
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Frequency
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50Hz±2%
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Power consumption
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40W
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Operation environment
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Operation temperature
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＋5°C～45°C
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Storage temperature
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－25°C～+55°C
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Relative humidity
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10～75%
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Radiation and safety Up to GB13837-92 and GB8898-88
Mechanic characteristics Dimension: 44.5mm(1U)*483mm*(19”)*400mm
Weight 6kg
E3 /DS3 Interface (optional)
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Input
（G.703 standard）
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Connector
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BNC
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Impedance
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75Ω
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Packet format
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188/204 bits
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Bit rate
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E3/DS3 No-frame format (34.368Mbps/44.736Mbps)
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Output（loop）
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Connector
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BNC
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Impedance
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75Ω
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Warm tips:
Specification and picture are for reference only, the actual item is the standard, welcome to contact our seller.
Digital Headend System
