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CX24110

Conexant Systems
Part Number CX24110
Manufacturer Conexant Systems
Description Qpsk/bpsk Demodulator ic
Published Dec 14, 2005
Detailed Description digital infotainment products QPSK/BPSK Demodulator lC CX24110 High-Performance, Low-Power Broadband Satellite Front-...
Datasheet PDF File CX24110 PDF File

CX24110
CX24110

Overview
digital infotainment products QPSK/BPSK Demodulator lC CX24110 High-Performance, Low-Power Broadband Satellite Front-End Solution Combining Conexant’s experience in broadband systems and mixed-signal integrated circuit design, the CX24110 is the ideal solution for a wide variety of applications in DVB/DSS set-top and PC receivers, digital VCRs, and single/multiple-channel per carrier receivers.
When combined with the CX24108 satellite tuner RF IC, the CX24110 provides a complete broadband satellite front-end demanding satellite environments.
The CX24110 is a QPSK/BPSK demodulator IC with internal dual w analog-to-digital converters, digital demodulation, and forward-error w correction (FEC).
The demodulator IC provides digital derotation, digital filtering, equalization, and Viterbi/Reed-Solomon FEC.
The CX24110 is compliant with the DVB (ETS 300-421) specification for satellite transmission.
w .
D Distinguishing Features • QPSK/BPSK demodulation • DVB/DSS compliant • Symbol rates: 1 to 45 Msps • Automatic acquisition • Adaptive (FIR) equalizer • Internal Viterbi and Reed-Solomon FEC • Internal SNR and BER monitors • DiSEqC™ Level 1.
1 LNB control The CX24110 provides many advanced features that enhance overall system performance.
The demodulator IC automatically corrects for external quadrature gain/phase imbalances and for DC offsets.
The input signal level variations (e.
g.
, due to rain fade) are compensated for the Automatic Gain Control, and frequency offsets due to inexpensive consumer LNBs are corrected by a robust-carrier tracking loop.
A unique feature of the CX24110 is an automatic acquisition algorithm which searches and acquires the carrier during initial acquisition, and performs a smart search to reacquire the carrier during fade conditions.
The CX24110 has integrated SNR and BER monitors for channel-performance measurements.
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