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The DRX 3975D and DRX 3978D interface seamlessly to so-called silicon tuners, as well as usual can tuners.The DRX 3975D and the DRX 3978D can be applied as demodulator for DVB-T applications or – in combination with the DRX 3960A – in a hybrid front-end for combined analog and DVB-T reception. The combination DRX 3975D or DRX 3978D and DRX 3960A enables an economic solution for hybrid reception, using only one tuner and one 8 MHz SAW filter. This concept allows the end-user to receive analog or DVB-T broadcasts, depending on the local spectrum allocation.
DVB-T Front-End Block DiagramFigure 2 shows a block diagram of a typical DVB-T front-end. The DRX 3975D is used to control a tuner via the optional RF-AGC signal. If the tuner has an integrated RF-AGC, this signal line is not required. The 4 MHz clock reference output of the tuner is used as clock input for the DRX 3975D, thus saving an external crystal. Via the pre-SAW sense input, the RF signal level can be monitored for optimal RF-AGC control and/or RF-level measurement. For further details and availability information please contact .
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Features
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ADD2+ connector (PCIe & sDVO)
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RF TV-antenna (air and cable)
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A/V header for STB, DVD etc.
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TOS-link for S/PDIF & analog stereo
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Front panel video-in connector
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TV-OUT jack, S-Video/CVBS
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sDVO chip set for DVI-I on-board
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“Near-production” layout
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Main Features
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Features
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Main Features
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The second application shows a block diagram of a flat-panel design using the MDE 9517D performing all the digital MPEG processing, the VGC video, graphic, scaler and controller IC, handling all the analog services, the MSP 44xyK for analog audio demodulation and baseband processing and the DRX 39xyD / DRX 386xA as front-end
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