L64777 A LSI Logic Corporation, L64777 A Datasheet - Page 2

• Manufacturer Part Number: L64777 A
• Description: Communications, DVB QAM Modulator
• Manufacturer: LSI Logic Corporation

Figure 2
Features and Benefits
2
QPSK Satellite Receiver
Transmission Network
MPEG transport MUX
L64777 Operating Environment
The modulator is intended to follow either an MPEG transport stream
source (for example, a transport multiplexer) or a satellite receiver, such
as the LSI Logic L64724 (see
system-compliant frames at the input.
You can program the sync word and block length, and the chip can
reinsert the sync information. The device handles the MPEG-specific
transport-packet error indication (TEI) bit internally.
The following is a partial list of features and benefits of the L64777.
L64777 DVB QAM Modulator
An on-chip voltage-controlled oscillator improves the symbol rate
PLL to support most frequently used application ranges.
A serial interface replaces the eight-bit microprocessor interface.
A digital numerically controlled oscillator (NCO) and interpolation
mode support operation with the L64724 device.
DVB standard ETS 300 429-compliant modulation operation
Highly integrated global synchronization and clock control
On-chip VCO to support symbol rates up to 10 Msymbols/s
Digital NCO and interpolation mode to support operation with the
L64724
Four-fold Nyquist filter oversampling
Maskable interrupts for all error conditions
Individual module bypass configuration modes
I and Q baseband outputs both in digital and analog formats
MPEG Transport
Stream (Digital)
Modulator
L64777
QAM
Figure
Modulated I and Q
Analog QAM
Components
2). It processes MPEG-2
Mixer
RF
Network
Cable