CX24123

Digital Set-top Box Solutions Satellite CX24123 Demodulator and FEC Decoder Low-power QPSK demodulator for worldwide satellite set-top box applications Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The CX24123 is a DVB, DSS, and DCII compliant demodulator and Forward Error Correction (FEC) decoder. When combined with a satellite tuner, such as the CX24109 tuner, the CX24123 provides a complete broadband satellite front-end solution capable of operating from 1 to 45 Msps. The CX24123 is the ideal solution for a wide variety of applications in digital satellite set-top box, personal computer receivers and residential gateways. This DiSEqC™ 2.x compliant demodulator enables two-way communication between the set-top box and peripheral satellite equipment such as LowNoise Block Converters (LNB) and switches. Providing digital derotation, digital filtering, equalization, and Viterbi/ReedSolomon FEC, the CX24123 provides many advanced features that enhance overall system performance. The CX24123 automatically corrects for external quadrature gain/phase imbalances and for DC offsets. Input signal level variations (e.g., due to rain fade) are compensated by automatic gain control CX24123 Distinguishing Features Symbol rates: 1 to 45 Msps Automatic acquisition Low-power design Internal SNR and BER monitors DiSEqC Level 2.x compatible ™ w w (AGC). Frequency offs...