VESTEL 17MB35, Service Manual

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Japanese DBS systems require a transport stream multiplex frame (TSMF) layer to
carry digital signals over cable systems. When the recovered transport stream is a
multiplex frame, the STV0297E post-processes it to extract a single transport stream.
Automatic detection of the TSMF layer is provided. The chip integrates an analog-to-
digital converter that delivers the required performance to handle up to 256-QAM signals
in a direct IF sampling architecture, thus eliminating the need for external
downconversion.
7.2. Features

Decodes ITU-T J.83-Annexes A/C and DVB-C bit streams

Processes Japanese transport stream multiplex frame (TSMF)

High-performance integrated A/D converter suitable for direct IF architecture in all
QAM (quadrature amplitude modulation) modes

Supports 16, 32, 64, 128 and 256 point constellations

Small footprint package: (10 x 10 mm²)

Very low power consumption

Full digital demodulation

Variable symbol rates

Front derotator for better low symbol rate performance and relaxed tuner
constraints

Integrated matched filtering

Robust integrated adaptive pre and post equalizer

On-chip FEC A/C with ability to bypass individual blocks

10 programmable GPIO

Two AGC outputs suitable for delayed AGC applications (sigma-delta outputs)

Integrated signal quality monitors, plus lock indicator and interrupt function
mapped to GPIO pin

Improved signal acquisition

System clock generated on-chip from quartz crystal

Low frequency crystal operations 4, 16, 25 - 30 MHz

4 I2C addresses

Easy control and monitoring via 2-wire fast I2C bus
7.3. Absolute Maximum Ratings