The CL-CR3710 supports DVD disc speeds up to 8x and Ultra DMA host speeds up to 33.3 Mbytes/sec. The RF signal is over-sampled by a high-speed ADC (analog-to-digital converter). The timing loop is closed in the digital domain with variable decimation and interpolation used to provide the output samples to the data recovery logic. A channel-quality logic circuit is provided to allow parametric calibration.