The MVD cable modulator J83B core is a drop-in module that includes the following functions :
• Input data framer from DVB-SPI source (MPEG-TS flow)
• J83B modulator
- Checksum
- Reed-Solomon encoder
- Interleaver
- Trellis Coded Modulation
• Output for complex DAC (2 x 8 bits)
The MVD cable modulator J83B core is delivered for baseband output to be natively connected to AD9789 DAC from Analog Devices but can be used in Intermediate Frequency application (for Analog Devices (AD9744)) or in RF application when espectively connected to our UPSAMPLER or our PCONVERTER core (for Analog Devices (AD9739A) or Maxim RF DACs (MAX5881))
Cable Modulator J.83 Annex B
Overview
Key Features
- ITU-T J.83 Annex B Compliant baseband transmitter for Cable Modem Termination Systems (CMTS)
- Drop-in module for Spartan-6™, Virtex-6™, Artix-7™, intex-7™, Virtex-7™ FPGAs and Zynq™
- Single clock (up to 160 MHz)
- Robust SPI input (discarding incorrect input packets)
- PCR re-stamping
- Supports 5.056941 & 5.360537 symbol rates
- Programmable 64 and 256 QAM Symbol Mapping
- All interleaver modes can be implemented as internal memory
- Complex baseband outputs (2 x 8 bits) @ Fsymbol rate
- Fully synthesizable RTL VHDL design (not delivered) for easy customization
- Design delivered as Netlist
- MER > 42dB
Block Diagram
Applications
- Cable modulator J83B may be used in applications related to cable transmission, typically at the cable head end.
Deliverables
- Datasheet
- Netlist for core generation
- VHDL top file
- VHDL source code : can be delivered as an option under NDA and other specific clauses
Technical Specifications
Availability
Available