L64734 datasheet(6/48 Pages) LSI

6 / 48 page

L64733/L64734 Tuner and Satellite Receiver Chipset

Features and Beneﬁts

System Features

• Direct down-conversion

• Integrated programmable cut-off low-pass ﬁlters for variable-rate

operation

• Dual AGC for optimizing performance with respect to intermodulation

and noise

• Integrated synthesizer

• Integrated quadrature amplitude and phase imbalance compensation

• RF loop-through

Chipset Features

• Supports DVB and DSS system speciﬁcations

• BPSK/QPSK demodulation rates from 1 to 45 Mbaud

• Matched ﬁlter (square root raised cosine ﬁlter with roll-off factor of

20% or 35%)

• Anti-aliasing ﬁlters for operation from 1 to 45 Mbaud without

switching external SAW ﬁlters or the need for low-pass ﬁlters

• On-chip digital clock synchronization

• On-chip digital carrier synchronization, featuring a frequency sweep

capability for signal acquisition

• Auto-acquisition demodulator mode and tuner control through an

on-chip microcontroller

• Integrated Phase-Locked Loop (PLL) for clock synthesis, allowing the

use of a fundamental mode crystal

• Fast channel switching mode

• Power estimation for AGC control

• Programmable Viterbi decoder module for rates 1/2, 2/3, 3/4, 5/6,

6/7, 7/8

• Reed-Solomon decoder (204/188), (146/130)

• Auto-synchronization for Viterbi decoder

L64734 Datasheet(PDF) 6 Page - LSI Computer Systems