Set-top Box Solutions Satellite Advanced Modulation Demodulator and Turbo FEC Decoder CX24114 Low-power advanced modulation demodulator for worldwide satellite set-top box applications Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enables the digital home and information network. The CX24114 advanced modulation turbo FEC decoder provides increased satellite system throughput by up to 35 percent utilizing existing bandwidth. The CX24114 demodulator converts incoming analog signals from a tuner into a digital format, assesses the signal for errors, and then outputs a digital data transport stream to an audio/video decoder chip. The CX24114 can decode DVB, DSS QPSK/BPSK signals at 15-30 MSps. It is fully compliant with DVB and DSS specifications and is designed to work with existing and next-generation transponders. It has two 8-bit A/D converters that are required for high-performance operation. The low power consumption and dissipation, combined with a small footprint, increases reliability and lowers overall cost. Distinguishing Features • DVB/DSS/DCII compliant • 8PSK/QPSK/BPSK demodulation • Symbol rates A unique feature of the CX24114 is an automatic acquisition algorithm that searches and acquires the carrier within ±10 MHz range during initial - DVB: 15-30 MSps acquisition and performs a smart search to reacquire during fade condition. - Turbo QPSK: 15-30 MSps The CX24114 has an on-chip microcontroller for acquisition, Es/No frequency - 8PSK: 15-30 MSps estimation, and system monitoring. The CX24114 is a DiSEqC 2.x compliant demodulator that enables two-way communication between the Set-top Box (STB) and peripheral satellite • Advanced modulation rates - Turbo QPSK: 1/2, 2/3, 3/4, 5/6, 7/8 - 8PSK: 2/3, 3/4, 4/5, 5/6, 8/9 equipment such as low-noise block (LNB) converters and switches. The • Automatic acquisition CX24114 has integrated signal-to-noise ratio (SNR) and bit error rate (BER) • DiSEqC 2.x compliant monitors for channel-performance measurements to simplify production testing. Conexant’s advanced modulation front-end solution enables satellite STB TM • Power down mode • Integrated SNR and BER monitor providers to deliver cost-effective, digital STBs that support a wide range of consumer video services, such as transmitting additional channels and providing HDTV viewing preferences. Part Number CX24114 Description Advanced Modulation Demodulator and Turbo FEC Decoder Set-top Box Solutions Satellite CX24114 Features • Dual Integrated 8-bit ADCs • Serial/parallel output data I/F • Carrier tracking: ± sample frequency/8 • Supply voltage: 1.2 V • Internal carrier and bit timing recovery • Ambient temperature: 0–85º C • ±10 MHz acquisition range • 100-pin TQFP ������������ ���������� ����������� ������������ ���� � ��� ���� ���� ����������� � ���� ���� ��������� ���� ������ ���������� � ������ ������������ ����� ��������� ��������� ������� ��� ������������ ��������� ����� ��������� �������������� ��������� ���� ����������� CX24114 Advanced Modulation Demodulator and Turbo FEC 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. 04-1073 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# 102361A