CX24109 Datasheet PDF - Conexant Systems
| Part Number | CX24109 | |
| Description | (CX24121 / CX24109) DBS Demodulator And Fec Decoder | |
| Manufacturers | Conexant Systems | |
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Digital Set-top Box Solutions
Satellite
CX24109 Digital Satellite Tuner and
CX24121 QPSK/FEC Demodulator
Highly Integrated, Complete Broadband Satellite
Front-End Solution
Conexant’s broadband communications portfolio includes a comprehensive
suite of semiconductor solutions that enable the digital home and information
network. Combining extensive experience in broadband systems and mixed-
signal integrated circuit design, Conexant introduces the CX24109 Digital
Satellite Tuner and CX24121 DBS Demodulator/FEC Decoder creating the ideal
satellite front-end solution for the world wide pay TV services. Several million
Satellite Set-Top Boxes (STBs) are deployed in many different entertainment
networks around the world today. This highly integrated combination of
demodulator and satellite tuner reduces the BOM costs and simplifies RF
layout.
CX24109
The CX24109 is a highly integrated, direct down-conversion satellite tuner
intended for high-volume digital video, audio, and data receivers. When
combined with Conexant’s existing CX24110 QPSK demodulator/FEC
decoder, the chipset provides a complete broadband satellite front-end
solution capable of operating from 1 to 45 Msps in the most demanding
satellite environments. It is compatible with international standards such
as DVB and DSS and supports a BPSK mode as well as DCII. Combined
with the CX24121 QPSK demodulator/FEC decoder, the chipset provides a
complete broadband satellite front-end solutions capable of operating from
10 to 32 Msps specifically targeting the PayTV segment of the market with
a very optimized BOM and cost effective solution.
w CX24121
The CX24121 is the ideal solution for a wide variety of applications in
wDVB/DSS/DCII STB and Personal Computer (PC) receivers and residential
wgateways. When combined with the CX24109 silicon satellite tuner, the
CX24121 provides a complete broadband satellite front-end solution capable
.of operating from 10 to 32 Msps. The demodulator provides digital derotation,
Ddigital filtering, equalization, and Viterbi/Reed-Solomon Forward-Error
aCorrection (FEC). The CX24121 is compliant with the DVB (ETS 300-421)
tspecification for satellite transmission and provides many advanced features
athat enhance overall system performance. The demodulator automatically
Scorrects for external quadrature gain/phase imbalances and for DC offsets.
Input signal level variations (e.g., due to rain fade) are compensated by
hAutomatic Gain Control (AGC). Frequency offsets due to inexpensive
econsumer Low-Noise Block Converters (LNBs) are corrected by a robust
eCarrier-Tracking Loop (CTL). A unique feature of the CX24121 is an automatic
tacquisition algorithm that searches and acquires the carrier during initial
4acquisition and performs a smart search to reacquire the carrier during fade
Uconditions. The CX24121 has integrated Signal-to-Noise Ratio (SNR) and
Bit Error Rate (BER) monitors for channel-performance measurements. The
.cCX24121 also integrate a DiSEqC™ Level 1.2 for controlling the external
omsatellite LNB.
Distinguishing Features
CX24109
• DVB/DSS – compliant
• Single-chip RF-to-baseband
satellite receiver
• Zero-IF architecture eliminates the
need for image-reject filtering
• Variable baseband filters for optimal
interference rejection
• Integrated LNA and LO with onboard
VCO and synthesizer
• Single +5V supply
• 48-pin eTQFP
CX24121
• DVB/DSS/DCII - compliant
• Symbol rates: 10 to 32 Msps
• Automatic acquisition
• Internal SNR and BER monitors
• DiSEqC™ Level 1.1 LNB control
• 80-pin PQFP
Part Number CX24109 and CX24121
Description Digital Satellite Tuner and Demodulator
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CX24109 electronic component. |
| Information | Total 2 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CX24109.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| CX24108 | The function is Digital Satellite Tuner RF IC. Conexant |  |
| CX24109 | The function is Digital Satellite Tuner. Conexant | |
| CX24109 | The function is (CX24121 / CX24109) DBS Demodulator And Fec Decoder. Conexant Systems | |
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