參數(shù)資料
型號(hào): L64777
英文描述: L64777 DVB QAM Modulator technical manual 6/00
中文描述: L64777的DVB QAM調(diào)制器技術(shù)手冊(cè)6 / 00
文件頁數(shù): 12/124頁
文件大?。?/td> 988K
代理商: L64777
1-2
Introduction
1.2 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 Figure 1.1). It processes MPEG-2 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.
Figure 1.1
L64777 Operating Environment
The features of the L64777 include:
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
I
2
C-compatible serial interface for control, setup, and monitoring of
various chip parameters
User-controllable input synchronization schemes
16, 32, 64, 128, and 256 QAM modes
Reed-Solomon encoder
MPEG Transport MUX
QPSK Satellite Receiver
L64777
QAM
Modulator
Cable
Network
RF
Mixer
Transmission Network
MPEG Transport
Stream (Digital)
Analog QAM
Modulated I and Q
Components
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