L64733 LSI Logic Corporation, L64733 Datasheet - Page 11

• Manufacturer Part Number: L64733
• Description: Tuner/receiver Chipset
• Manufacturer: LSI Logic Corporation

Channel Data Signals
INSEL
MODn, MODp Prescaler Modulus
PLLINn, PLLINp
QDCn, QDCp Q-Channel DC Offset Correction
This section describes the channel data signals from the L64733 to the
L64734.
IOUTn, IOUTp I-Channel Baseband Data
QOUTn, QOUTp
L64733/L64734 Tuner and Satellite Receiver Chipset
RF Port Input Select
When the INSEL signal is asserted, the L64733 is in
normal mode. When the INSEL signal is deasserted, the
L64733 is in Loop-Through mode. In this mode, the RFIN
signal is looped through to the RFOUT signal, and the
L64733 local oscillator is shut off.
The MOD differential signals form a PECL input that sets
the prescaler modulus. When the MODp signal is positive
with respect to the MODn signal, the prescaler modulus
is set to 32 (divide by 32). When the MODn signal is
positive with respect to the MODp signal, the prescaler
modulus is set to 33 (divide by 33).
Phase Detector
The PLLIN differential signals form the phase detector
input and are connected to the L64734 PLLINp and
PLLINn output signals. See the L64734 PLLINp and
PLLINn descriptions in the
“Synthesizer Control Interface”
Connect a 0.1 F (or larger) capacitor between the QDCp
and QDCn signals.
The IOUT differential signals form the in-phase data
provided to the L64734.
Q-Channel Baseband Data
The QOUT differential signals form the quadrature-phase
data provided to the L64734.
subsection entitled
on
page
19.
Output
Output
Input
Input
Input
Input
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