GX1101……QPSK (DVB-S)

Product description：
　 GX1101 is a single-chip demodulator and channel decoder compliant to DVB-S Standards. With patented high-speed auto-scan function and perfect bus interfaces and repeaters, GX1101 provides outstanding performance in the market and is selected by major digital satellite STB/tuner manufacturers.
Features：
· QPSK demodulator and FEC conform to EBU specification for DVB-S
　 Programmable Parallel and Serial Output interface
· High speed searching mode for blind symbol rate or/and code rate acquisition
· Integrates high precision ADC with dual-6bits,90M
· Digital Cancellation of A/D offset
　 Interpolating and anti-aliasing filters support 1 to 45Mbaud Symbol rates
　 Full digital timing recovery loop with lock detector
　 Full digital carrier recovery loop with lock detector: Acquisition range up to±45M
　 Digital Nyquist square root filter with roll-off of 0.35
· Viterbi soft decoder, constraint length K=7,rate=1/2. Automatic code rate search or programmable within 1/2,2/3,3/4,5/6 and 7/8
　 Automatic spectrum inversion ambiguity resolution
　 Automatic frame synchronization
　 Convolutional de-interleaver ,RS decoding and de-scrambler complies with DVB-S
　 Channel quality estimation
· AGC output with PDM mode
　 2-wire serial bus interface and repeater
　 Advanced software interface for convenient software control
　 Integrated PLL clock generator using external low cost passive crystal
　 DiSEqC v2.2 modulation output for full control of LNB and dish
　 BIST inside
· Others
　 Package: 64LQFP
Application fields：
· Digital satellite STB
· Digital satellite tuner
Solution：

PCB：