Digital Headend
Terrestrial Processor
Satellite Decoder
MPEG Encoder
Digital Modulator
Digital Controller
Media Converter
Analog Headend
Network
Accessory

Digital Modulator

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8-VSB Mediaplex
DVM-1904ML

ITD, IRD, Encoder, PSIP/SI Server등에서 출력된 Transport Stream 신호를 4채널까지 Remultiplexing 처리하여 하나의 TS신호로 출력하는 Remultiplex와 DTV전송에 적합한 8-VSB 방식으로 변조하여 DTV방송에 적합한 주파수 대역으로 출력하는 Modulator를 결합한 8VSB Mediaplex이다. Digital CATV System 구성함에 있어 다 채널 전송 및 구성을 Compact화 하는데 매우 효과적인 제품이다.

* 4 ASI Input Remultiplexing
* 8-VSB Modulation or QAM Modulation (Option)
* PID filtering/Re-mapping (채널별)
* Monitoring of the incoming PSI/SI
* PCR Re-stamping
* DVB compliant scramble (Option)
* 1RU, 표준형 19” Rack Mount Type
* 조정상태를 VFD Display Monitoring
  · Input Mode Setting
  · Data, Bit Rate Setting
  · Output CH (Frequency) 가변 및 표기
  · Output Level 증감 조절 및 측정
  · TV/CATV Band Select
* NMS를 위한 Ethernet SNMP기능
  ITEM CHARACTER
ASI Input Input Channel 4 Port
Connector BNC
Impedance 75 Ω
Packet Format 188 Byte
Bit Rate 19.393 Mbps
Syntax SPTS or MPTS
ASI Output Transport Stream 2 Port
Connector BNC
Impedance 75 Ω
Bit Rate 200 Mbps
Syntax SPTS or MPTS
RF Output Frequency Range 50~870 MHz
Impedance 75 Ω
Output Level 55 ± 5 dBmV
Level Control Range 0 ~ -15 dB
MER After Equalizer 42 dB
MER Before Equalizer 37 dB
Signal to Noise Ratio ≥ 50 dB
Phase Noise VHF -105 dB@20KHz
UHF -103 dB@20KHz
Adjacent Channel Carrier Attenuation Characteristic ≤ -45 dB (Out of band)
Spurious ≤ -63 dB
Return Loss ≥ 17 dB
Frequency Response ± 0.5 dB (5.38MHz)
Frequency Tolerance ± 2 ppm
Group Delay ± 20 ns (5.38MHz)
PCR Jitter ≤ ± 200 ns
Ethernet Connector RJ-45
Interface Type 10/100 Base-T
Protocols HTTP, SNMP, UDP
User Interface Java
General Power Requirements AC 90~230V, 60Hz
Power Consumption Max. 50 W
Weight 3.6 Kg
Dimensions (W x H x D) 482 x 44 x 337 mm
Material AL
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