Digital Set-top Box Solutions
Satellite
CX24123 Features
• DVB/DSS/DCII-compliant
• Symbol rates 1 to 45 Msps
• Internal PLL, only a single low-frequency
crystal or clock is required
• 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
• External symbol clock reference
• Internal SNR and BER monitors
• DiSEqC
™
level 2.x two-way Low-Noise Block Converter
(LNB) control
• Power-down mode
• Quadrature equalization compensation
– ±3.0 dB gain imbalance
– ±13-degree phase offset
CX24123 Applications
• DVB/DSS/DCII set-top box and PC receivers
• Residential gateways
Deinterleaver
Descrambler
I
Q
Dual
A/D
I soft
VDATA
QPSK/BPSK
Viterbi
Demodulator Q soft Decoder VDATA_CLK
RS_DATA[7:0]
RS_CLOCK
Reed-
Solomon
Tuner
Interface
Microprocessor
Interface
Auto
Acquisition
CX24123 Block Diagram
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are owned by their respective owners. Although Conexant strives for accuracy
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CONEXANT [ CONEXANT SYSTEMS, INC ]
