CX24123 CONEXANT [Conexant Systems, Inc], CX24123 Datasheet - Page 2

• Manufacturer Part Number: CX24123
• Description: Demodulator and FEC Decoder Low-power QPSK demodulator for worldwide satellite set-top box applications
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CX24123 Features
• DVB/DSS/DCII-compliant
• Symbol rates 1 to 45 Msps
• Internal PLL, only a single low-frequency
• Automatic acquisition
• ±10 MHz acquisition range
• Carrier tracking: ±5 MHz
• 6-bit Analog-to-Digital Converters (ADCs)
• 4-bit soft decision
• Digital matched filtering
• Multirate decimation filter
• Internal carrier and bit-timing recovery
• Boundary scan test function
• Serial or parallel output data interface
03-0746
Digital Set-top Box Solutions
Satellite
crystal or clock is required
© 2003, Conexant Systems, Inc. All Rights Reserved. Conexant and the
Conexant logo are 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.
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
special, indirect, incidental or consequential damages as a result of its use.
Q
I
Dual
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
A/D
Conexant shall not be liable for any
Demodulator
QPSK/BPSK
Interface
Tuner
CX24123 Block Diagram
Q soft
I soft
Microprocessor
Decoder
www.conexant.com
General Information:
U.S. and Canada: [phone]
International: [phone]
Headquarters – Newport Beach
4311 Jamboree Rd, P .O. Box C
Newport Beach, CA 92660-3095
Order# 102134A
Interface
Viterbi
VDATA_CLK
VDATA
Acquisition
• External symbol clock reference
• Internal SNR and BER monitors
• DiSEqC
• Power-down mode
• Quadrature equalization compensation
CX24123 Applications
• DVB/DSS/DCII set-top box and PC receivers
• Residential gateways
(LNB) control
– ±3.0 dB gain imbalance
– ±13-degree phase offset
Auto
Solomon
Reed-
™
level 2.x two-way Low-Noise Block Converter
RS_DATA[7:0]
RS_CLOCK