DTMB Modulator
1.Support all the modes of GB20600-2006
2. Support SFN and MFN modes
3. modulation and channel encoding
Digital TV Headend DTMB Modulator
Outline
JXDH-6405 DMB-TH Modulator is a high performance modulator in accordance with our country terrestrial wireless transmission TV signal.This modulator completely complies all the 330 kinds modes of EN50083 standards,which supply 1pps and 10MHz input, Built-in time synchronization module, as well as the SIP packet remote configuration modulation parameter.
*Comply with EN50083 ASI standard
* Support all the 330 modules of the 20600-2006 standard
* With two ASI inputs,support hot reserve input mode
* Support SFN and MFN mode
* Support packet and burst mode of transport stream
* High reliability of amplitude output
* SFN mode: time offset setting,time synchronization, bit rate synchronization, frequency synchronization
* MFN mode: bitrate adaption, NIT update, PCR adjustment
Specifications
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Output level
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0dBm
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MPEG-TS Input
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complying EN 50083 ASI standard
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support 188/204 Bytes packet mode
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bit rate
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4.813Mbps ~ 32.486Mbps
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interface
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BNC with resistance 75Ω
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RF output
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with adjustable center frequncy 470MHz-862MHz, Stepping
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1KHz
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major level
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0dBm
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attenuation
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10dB–0dB
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Stepping
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0.5dB
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test output
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-30 dB
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return loss
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>15dB
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stability
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±0.1dB/10℃
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I/Q phase balance error
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< 0.05%
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I/Q phase error
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< 0.05°
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MER
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>38dB
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shoulder frequency
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>50dB @ ± 4.2MHz
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noise
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>50dB
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connector
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N-type,resistance as 75Ω
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MIP process
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synchronization information,remote setting for modulation parameters
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TPS option
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support all the modes of GB20600-2006
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network mode
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SFN mode:time offset setting,time synchronization,bit rate synchronization,frequency synchronization
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MFN mode
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bitrate adaption, NIT update,PCR adjustment
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number of modulation carrier(FFT)
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3780
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guard interval
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1/4(945),1/7(595),1/9(420)
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FEC outer
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BCH
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FEC inner
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LDPC
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encode mode
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0.4, 0.6, 0.8
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modulation mode
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4QAM-NR ,4QAM,16QAM,32QAM,64QAM
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bandwidht
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8MHz
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Clock Synchronization
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outer clock with 10MHz (GPS)
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Input level: -15dBm~ +15dBm
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Input connector: BNC socket,resistance as 75Ω
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inner clock with 10MHz
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stability: 0.5ppm(classic); 3.0 ppm(maximum)
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level: 0dBm ± 3dBm
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outer 1pps clock(GPS)
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Input reference level: TTL level –5 KΩ
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Input reference minimum pulse width: 1μs
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Input connector: BNC socket, resistance as 75Ω
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**For more detailed information, please contact our salesmen.