Set-top Box Solutions
Satellite
DVB-S2 Demodulator and Forward Error
Correction Decoder
CX24116
Conexant鈥檚 portfolio includes a comprehensive suite of semiconductor
solutions for broadband communications, enterprise networks, and the
digital home. The CX24116 is based on an open DVB-S2 standard and
offers an alternate path for service providers to use advanced modulation
(8PSK) with LDPC/BCH FEC. This will realize increased satellite throughput
that can be used to offer additional programming and services.
The CX24116 can demodulate and decode signals transmitted in
accordance with the new DVB-S2, DVB-S and DIRECTV specifications.
It has an automatic acquisition algorithm that searches and acquires the
carrier within a 鹵10 MHz range during initial acquisition and performs
a smart search to reacquire under fade condition. The CX24116 has an
on-chip microcontroller for fast-signal acquisition, Es/No estimation, and
system monitoring. In addition, the on-chip microcontroller saves software
integration time by minimizing the external driver code. The CX24116 has
integrated signal-to-noise ratio (SNR) and bit error rate (BER) monitors for
channel-performance measurements that simplify production testing.
Distinguishing Features
鈥?8PSK/H-8PSK/QPSK/BPSK
鈥?DVB-S/DSS backward compatible
鈥?Nonbackward-compatible mode
- Symbol Rates
鈥?QPSK/LDPC/BCH: 20-30 Msps
鈥?8PSK/LDPC/BCH: 10-30 Msps
- Code Rates
鈥?QPSK: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
鈥?8PSK: 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
鈥?Automatic acquisition
鈥?鹵10 MHz acquisition range
鈥?Internal microcontroller
鈥?Serial/parallel output data intermediate
frequency (IF)
鈥?Integrated SNR and BER monitor
鈥?DiSEqC
鈩?/div>
2.x compliant
鈥?Power-down mode
鈥?1.2-V core voltage
鈥?3.3-V I/O voltage
鈥?100-pin exposed thin quad flat pack (ETQFP)
The CX24116 can be used in conjunction with the Conexant鈥檚 CX24118 Tuner
RF IC to create a complete satellite AMC front-end solution.
Conexant鈥檚 advanced modulation front-end solution enables satellite STB
providers to deliver cost-effective, digital STBs that support a wide range of
consumer video services, such as transmitting additional local channels and
high-definition television (HDTV) channels.
Part Number
CX24116
Description
DVB-S2 Demodulator
and FEC Decoder
CONEXANT
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