Working principle

MKQA-610 QAM modulator with DVB-C standard television signals by MPEG-II coding and other data stream rehabilitation to deal with, and then into the QAM modulator, QAM coding is based on the DVB technical specifications, such as cutting, RS FEC Coding, and so on. The IF frequency to deal with later on TV channels, in order to HFC, MMDS microwave transmission network, can be used for digital TV, data broadcasting, video-on-demand, Internet, video conference and other digital broadband applications.

  Main features

1.It’s  work in the QPSK ﹑ 16 QAM, 32QAM, 64QAM, 128QAM, 256QAM way
2.Inputs:ASI/API
3.Effective input data bit rate range: 2 Mbaud / s ~ 56MBaud / s
4.The output data bit rate range: 2 Mbaud / s ~ 56Mbaud / s
5.The output signal bandwidth (BW) range: 1.15 MHz ~ 8.05MHz
6.Output data symbol rate range: 1 MBaud / s ~ 7MBaud / s
7.LCD display panels used
8.A remote management and control interface (optional)
9.Power-down with memory function

  Technical specifications

  Data interface

  ASI interface（asynchronous serial interface）

  Inputs

1.Socket:BNC
2.Impedance:75Ω
3.Package format:188 or 204 bytes
4.Channeldata rate:270Mbps
5.Standards:the DVB standrd

  SPI inputs（synchronous parallel inputs）

1.Socket:DB-25 female
2.Package foemat:188 or 204 bytes
3.Standards: DVB-compatible, LVDS work methods

  RF output

1.Connector：BNC
2.Impedance：75Ω
3.Center frequency：36MHz、36.15MHz、35.25MHz
4.IF bandwidth：≤8MHz
5.Reflection loss：≥18dB

  RF output

1.Connector：F head（metric）
2.Impedance：75Ω
3.Center frequency：47MHz—860MHz
4.IF bandwidth：≤8MHz
5.Reflection loss：≥ 18dB
6.Maximum output level：100dBuV
7.Level adjustment range：10 dBuV

  Channel signal coding

1.Modulation ways：QPSK，16QAM，32QAM，64QAM，128QAM，256QAM
2.Access code:the DVB standard RS coding
3.MER：≤2.5％(RMS)
4.SNR(band)：≥40dB

  System control and Fault alarm

1.Signal input interface options（ASI/SPI）
2.Stream is not locked alarm
3.Overflow alarm
4.Data collection rate warning

  Power

1.Voltage    187V～253V AC
2.Frequency   50×(12%) Hz
3.Power    15W

  Working environment

1.Ambient temperature   ＋5C～45C
2.Storage temperature   -20C～+80C