QAM to 8-VSB Transmodulator

DMM-8624QV
  • LCD Display
  • SNMP Protocol

QAM to 8-VSB Transmodulator

Introduction

QAM(Quadrature Amplitude Modulation) 방식으로 변조된 Digital 신호를 ATSC 표준의 8-VSB RF 신호로 변환하여 디지털 방송 

서비스를 제공 하는 장비이며 4채널의 QAM 신호를 입력 받아 Remultiplexing된 DVB-ASI 신호를 8-VSB 신호로 변조하여 DTV 방송에 

적합한 RF 출력을 송출 할 수 있는 4Channel QAM to 8-VSB Modulator 이다.

Features

- RF QAM 4 Input, 8-VSB 4 Output

- ITU-T J.83 Annex B Support (Annex A/C Option) 

- PID Add-Drop Remapping

- PCR Re-stamping

- DDS(Direct Digital Synthesis) 변조방식 적용으로 뛰어난

  특성과 환경 변화에도 특성변화가 거의 없다.

- LCD Display에 의한 편리한 Control기능

  · QAM Input Mode Setting

  · QAM Modulation Setting (64,256QAM)

  · Interleave/Roll-Off/Spectrum Data Setting

  · Data Rate/Symbol Rate, Data Clock Setting

  · Output Frequency/Level Control

- SNMP Protocol을 이용한 NMS 지원

- 1RU, 표준형 19” Rack Mount Type

Specification

RF Input

  • Frequency Range
  • 54~1002 MHz
  • Impedance
  • 75 Ω
  • Channels
  • 1~4 ch

QAM Demodulator

  • Modulation
  • ITU-T J.83 Annex B (Annex A/C Option)
  • Monitoring
  • Power Level, MER

TS Processing

  • TS Remultiplexing
  • 4 Channel
  • PSI Regeneration
  • PID/Filtering/Remapping/Restemping
  • Monitoring of the Incoming PSI

ATSC Modulator

  • Modulation Standard
  • ATSC A/ 53
  • Constellation
  • 8 VSB
  • SNR (MER)
  • > 35 dB

RF Output

  • Channel
  • 1~4 adjacent RF channel configurable
  • RF Range
  • 54~1002 MHz
  • Output Level
  • 84 ~ 104 dbuV in 0.5db stepping (4 ch)
  • Spurious
  • <- 55 dB relative to output Level
  • Return Loss
  • >15 B
  • Phase Noise
  • <-98 dB / Hz

PSIP Generator (MGT, TVCT)

  • Major / Minor Channel Number
  • Null packet re-mux and PCR re-stamping for rate adaptation

Ethernet

  • Connector
  • RJ-45
  • Interface Type
  • 10/100 Base-T
  • Protocols
  • SNMP

General

  • Power Requirements
  • AC 90~230 V, 60 Hz
  • Power Consumption
  • 16 W
  • Weight
  • 9 Kg
  • Dimensions (W x H x D)
  • 482 x 44 x 630 mm
  • Material
  • AL
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