DVB-C Modulator J.83 Annex A/C Core
 
    Description

The MVD DVB-C Modulator J.83 Annex A/C core is a drop-in module that includes the following functions:
  • Input data framer from DVB-SPI source (MPEG-TS flow)
  • J83AC modulator
    • Energy dispersal
    • Reed Solomon encoder
    • QAM symbol mapper
  • Programmable RRC filter for annex A and C
  • Flexible Digital Up Converter
  • Modulator for FI output
  • Output for simple DAC (14 bits) or complex DAC (2x16bits)

Companion cores:

Complete application fits into 3S500E and/or 3S400A depending on selected options.

    
           
    Features
  • ITU-T J.83 Annex A/C, DVB-C (ETS 300 429) compliant baseband transmitter for Cable Modem Termination Systems (CMTS)
  • Drop-in module for Spartan™-3/E/A, Virtex-4™ and Virtex-5™ FPGAs
  • Single clock (up to 140 MHz+ for Spartan-3™,  180 MHz+ for Virtex-4™ and Virtex-5™)
  • Robust SPI input (discarding of incorrect input packets)
  • PCR re-stamping
  • Supports programmable symbol rates
  • Programmable 16, 32, 64, 128 and 256 QAM Symbol Mapping
  • Intermediate frequency output for single DAC (14 bits) or complex DAC (2 x 16 bits)
  • Single channel - support for multiple channels
  • Full synthetizable RTL VHDL design (not delivered) for easy customization
  • Design delivered as Netlist
  • MER > 43 dB
    
    Applications

The DVB-C Modulator J.83 Annex A/C Core may be used in applications related to cable transmission, typically at the cable head end.		    
           
           
                       
      For an IF output a low cost DAC can be used for an IF frequency ranging from 10 to almost 60 MHz. 

For an RF output there are two kinds of solutions :

  • Using an RF DAC (for example Analog Devices AD9789 (2 GHz DAC) or Maxim MAX5881 (4 GHz DAC).
    MVD cores can be adapted for working with any one of those RF DACs.
  • Using an analog Up Converter module (Microtune MT5100F). With this module the channel number can easily be changed without doing anythin in the FPGA.
    
      Documentation

    Contacts

 
Sales informations : info_cores@mvd-fpga.com
Technical support : support_cores@mvd-fpga.com