CONEXANT CX24116 Dvb-s2 demodulator and forward error correction decoder Datasheet

Set-top Box Solutions
Satellite
DVB-S2 Demodulator and Forward Error
Correction Decoder
CX24116
Conexant’s portfolio includes a comprehensive suite of semiconductor
solutions for broadband communications, enterprise networks, and the
digital home. The CX24116 is based on an open DVB-S2 standard and
offers an alternate path for service providers to use advanced modulation
(8PSK) with LDPC/BCH FEC. This will realize increased satellite throughput
that can be used to offer additional programming and services.
The CX24116 can demodulate and decode signals transmitted in
accordance with the new DVB-S2, DVB-S and DIRECTV specifications.
It has an automatic acquisition algorithm that searches and acquires the
carrier within a ±10 MHz range during initial acquisition and performs
a smart search to reacquire under fade condition. The CX24116 has an
on-chip microcontroller for fast-signal acquisition, Es/No estimation, and
system monitoring. In addition, the on-chip microcontroller saves software
Distinguishing Features
integration time by minimizing the external driver code. The CX24116 has
• 8PSK/H-8PSK/QPSK/BPSK
integrated signal-to-noise ratio (SNR) and bit error rate (BER) monitors for
• DVB-S/DSS backward compatible
channel-performance measurements that simplify production testing.
The CX24116 can be used in conjunction with the Conexant’s CX24118 Tuner
RF IC to create a complete satellite AMC front-end solution.
Conexant’s advanced modulation front-end solution enables satellite STB
providers to deliver cost-effective, digital STBs that support a wide range of
consumer video services, such as transmitting additional local channels and
high-definition television (HDTV) channels.
• Nonbackward-compatible mode
- Symbol Rates
• QPSK/LDPC/BCH: 20-30 Msps
• 8PSK/LDPC/BCH: 10-30 Msps
- Code Rates
• QPSK: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
• 8PSK: 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
• Automatic acquisition
• ±10 MHz acquisition range
• Internal microcontroller
• Serial/parallel output data intermediate
frequency (IF)
• Integrated SNR and BER monitor
• DiSEqC™ 2.x compliant
• Power-down mode
• 1.2-V core voltage
• 3.3-V I/O voltage
• 100-pin exposed thin quad flat pack (ETQFP)
Part Number CX24116
Description
DVB-S2 Demodulator
and FEC Decoder
Set-top Box Solutions
Satellite
The company’s broad portfolio of semiconductor products
and reference designs, Conexant offers a suite of networking
also includes client-side digital subscriber line (DSL) and cable
components that includes solutions for applications based on
modem solutions, home network processors, broadcast video
HomePlug® and HomePNA . Additional products include a
encoders and decoders, digital STB components and systems
complete line of asymmetric and symmetric DSL central office
solutions, and dial-up modems. In addition to its IEEE 802.11a/b/g-
solutions, which are used by service providers worldwide to deliver
compliant wireless local area network (WLAN) chipsets, software,
broadband data, voice, and video over copper telephone lines.
SM
DVB/DSS FEC
Viterbi/RS
Decoder
I
BPSK
QPSK
8PSK
H-8PSK
Dual
A/D
Q
Demodulator
QPSK/BPSK
Mode
Selection
MPEG/Data
Stream
Output
Processing
QPSK/8PSK/ H-8PSK
LDPC & BCH
FEC Decoder
Tuner
Interface
Microprocessor
CX24116 DVB-S2 Demodulator and Forward Error Correction Decoder
© 2004, Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant
logo are registered trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
04-1284
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters – Newport Beach
4000 MacArthur Blvd, P.O. Box C
Newport Beach, CA 92660-3095
Order# 102473B
MPEG
Transport
Sream
or
Data
Stream
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