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L64767 Datasheet

  • L64767

  • L64767 SMATV QAM Encoder data sheet 4/97

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L64767
SMATV QAM Encoder
Datasheet
Introduction
LSI Logic鈥檚 L64767 SMATV QAM Encoder is a highly-integrated device
designed speci鏗乧ally for Satellite Master Antenna Television (SMATV)
applications. The L64767 is ideally suited to any application that requires
a low-power, highly integrated forward error correction (FEC)
transmission encoder. Typical applications include rooftop SMATV
systems, cable head-ends, and optical networks in 鏗乥er-deep networks.
Figure 1
shows a basic SMATV QAM system using the L64767. The
device can process input from either an MPEG-2 transport encoder, a
satellite receiver, or a transmission network.
Figure 1. L64767 SMATV QAM System
PLL
PLL
MPEG-2 Transport
MUX
Cable
Plant
D/A
Passive
Filter
Analog
Mod
QPSK Satellite Receiver
LSI Logic
L64704
I
L64767
Q
Transmission
Network
MD97.1
The L64767 simpli鏗乪s the design process for FEC and modulation
encoding systems by providing built-in signal processing capabilities and
a byte-parallel, power saving architecture. The L64767鈥檚 ease of use will
help system engineers create the next generation of time-to-volume
sensitive digital products. In contrast, previous solutions for these
systems forced system engineers to use many programmable and
discrete devices on large circuit boards. These end products were
expensive and power-intensive, both of which are unacceptable for
today鈥檚 SMATV applications.
April 1999
Copyright 漏 1995, 1996, 1997 by LSI Logic Corporation. All rights reserved.
1

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