L64733C

® L64733C/L64734 Tuner and Satellite Receiver Chipset Datasheet The L64733C/734 chipset is designed for satellite broadcast digital TV. It is compliant with the European digital video broadcast (DVB-S) standard, as well as the technical specifications for DSS systems. The L64733C/734 chipset forms a complete “L-band-to-bits” system. A typical application of the L64733C/734 chipset is satellite digital TV reception in accordance with the ETS 300 421 standard. Figure 1 shows the L64733C/734 chipset satellite receiver implemented in a typical satellite receiver set-top decoder. Figure 1 Set-Top Box Block Diagram 27 MHz VCXO FLASH SDRAM-B SDRAM-A Expansion Bus Analog Audio Analog CVBS Analog Y/C Analog RGB Digital Video Satellite RF Signal L64733C Tuner L64734 Demodulator OP AMPs SC2000 Single-Chip Source Decoder Serial Bus IEEE 1284 Smart Cards RS232-C Interface CODEC I/R Rx & Tx GPIO Pins The L64733C Tuner IC directly down-converts the satellite signal from L-band to baseband; it includes an on-chip synthesizer. Using frequency information programmed into its configuration registers, the L64734 Satellite Receiver generates control signals for the L64733C synthesizer. The L64734 also controls the programming of the low-pass filters on the February 2001 Copyright © 2000, 2001 by LSI Logic Corporation. All rights reserved. 1 L64733C and generates dual automatic gain control (AGC) voltages for the two-stage automatic gain control on the L64733C. A simplified chipset...