L64734 datasheet(2/48 Pages) LSI

Part #	L64734

Description	Tuner and Satellite Receiver Chipset

PDF	48 Pages

Scroll/Zoom	100%

Manufacturer	LSI [LSI Computer Systems]

Direct Link	http://www.lsicsi.com

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2 / 48 page

L64733/L64734 Tuner and Satellite Receiver Chipset

Figure 2

L64733/34 Simpliﬁed Block Diagram

The L64734:

• generates control signals for the L64733 synthesizer, using

frequency information programmed into the L64734 conﬁguration

registers

• controls the programming of the low-pass ﬁlters on the L64733

• generates dual AGC control voltages for the two-stage automatic

gain control on the L64733 IC.

The L64733 Tuner IC directly down-converts the satellite signal from

L-band to baseband.

RF Input

RF Output

Select

IOUT

QOUT

Dual ADC

Demodulator

Error

Correction

Descrambler

Microcontroller

Interface

Microcontroller

Host

Control

Modules for

MPEG Output

L64733

L64734

Control Signals

Synthesizer,

Baseband

Filter

Synthesizer

and Filter

Switch

Mixer,

Down-

Converter

L64734 Datasheet(PDF) 2 Page - LSI Computer Systems

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