cx24110 Conexant Systems, Inc., cx24110 Datasheet

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cx24110

Manufacturer Part Number
cx24110
Description
Qpsk/bpsk Demodulator
Manufacturer
Conexant Systems, Inc.
Datasheet

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QPSK/BPSK
Demodulator lC
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
solution capable of operating from 1 to 45 Msps in the most
demanding satellite environments.
The CX24110 is a QPSK/BPSK demodulator IC with internal dual
analog-to-digital converters, digital demodulation, and forward-error
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.
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 com-
pensated 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.
C X 2 4 1 1 0
d i g i t a l
D i s t i n g u i s h i n g F e a t u r e s
• 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
i n f o t a i n m e n t
p r o d u c t s

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cx24110 Summary of contents

Page 1

... 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 ...

Page 2

... CX24110 block diagram Ordering Information Model Number Package CX24110 100-pin PQFP CX24110 EVK Evaluation Kit Product Features Product Specifications • QPSK/BPSK demodulation • External crystal frequency: 10 MHz • DVB/DSS compliant • Sampling frequency: 45,60,80,90 MHz • Symbol rates Msps • ...

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