Description
The MVD Cable modulator J83B 4-channel
core is a drop-in module for FPGA that
includes the following functions:
- Input data framer from DVB-SPI
source (MPEG-TS flow)
- J83B modulator
- Energy dispersal,
- Reed Solomon encoder
- Interleaver
- QAM symbol mapper
- Programmable RRC filter
- Flexible Digital Up Converter
- Modulator for FI output
- Output for simple DAC (14 bits)
or complex DAC (2x16bits)
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Features
- ITU-T J.83 Annex B compliant
baseband transmitter for Cable
Modem Termination Systems (CMTS)
- Drop-in module for
Virtex-5™, Virtex-4™
and Spartan™-3/E/A FPGA
- 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 5.056941 & 5.360537
symbol rates
- Programmable 64 and 256 QAM
Symbol Mapping
- All interleaver modes supported
thanks to external Synchronous
SRAM
- Intermediate frequency output for
single DAC (14 bits) or complex
DAC (2 x 16 bits)
- 4 independant channels
- Full synthetizable RTL VHDL
design (not delivered) for easy
customization
- Design delivered as Netlist
- MER > 41dB
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J.83 Annex B cable
modulator - 4-channel
