DESCRIPTION
Based on the DVB-RC cable and DAVIC specifications, the VES 1848 allows interactive communication through HFC network between settop boxes and headends.

FEATURES
• Fully compliant ETS300800 and DAVIC 1.2
• Out-Off Band demodulation scheme :
    - On chip 7-bit ADC.
    - DQPSK demodulator.
    - Roll-off factor = 0.3 .
    - Direct IF sampling.
    - Variable bit rate from 1 to 12 Mbit/s (SAW @ 8MHz BW).
    - Automatic Gain Control PWM output.
    - Descrambler.
    - Frame synchronization.
    - Deinterleaver.
    - RS decoder (55,53) .
• In Band scheme :
    - Parallel or serial MPEG2 Transport Stream inputs.
    - MAC PID filtering.
    - DAVIC ATM cells transmission supported.
• Up-Stream synchronization.
• Up-Stream modulation scheme :
    - Burst QPSK/16QAM modulator.
    - Roll-off factor = 0.25/0.3 .
    - Programmable preamble value.
    - Programmable burst length.
    - Direct IF synthesys from 5 to 46 MHz.
    - I and Q base band outputs provided.
    - Variable bit rate from 256kbit/s to 16Mbit/s.
    - Programmable RS encoder.
    - Scrambler.
    - On chip 10 bit DACs.
• External MAC functionality.
• Package 208 MQFP.
• CMOS technology (0.35µm, 3.3V).

APPLICATIONS
• Cable modem.
• DVB interactive set-top box.
• DAVIC ATM cable physical layer.