QPSK Modulator

QPSK Modulator for Cable TV (CATV) Digital Headend: 1.QPSK Modulator 2.DVB-S Modulator 3.Network Management

QPSK Modulator for Cable TV (CATV) Digital Headend:

Overview

E-4102 QPSK modulator is one of the main equipment of cable digital TV headend,  receiving data from the encoder, multiplexer, DVB gateway, scrambler, video server and other equipment of the DVB transport stream, make RS coding, convolutional interleaving and QPSK modulation channel processing, and provide RF output.

Features

. Comply with DVB standard channel coding;

. Support the full range of the variable symbol rate;

. 8M cache, anti-burst stream;

. Support IP data injection;

. Configurable PID filter, re-mapping, PSI, SI information synchronization update;

. Auto-filled streams filling and intelligent Null Packet removed;

. Support NIT table inserts;

. Real-time stream monitoring;

. PCR correction;

. Local and remote control;

. LCD display in Chinese and English, easy and flexible to operate;

. High reliability design, stable operation.

Technical Specification:

Modulation Mode		QPSK
symbol rate		1~45Mbaud/s
Error-correcting codes		RS code188/204
Input data code rate		1.0~108Mbps
Channel Data Rate		1~56Mbps
MER		>32dB
BER		0
Input interface	ASI	DVB standard
	RF Frequency	450~950MHz (or 950-2150)
	Output LEV	>=0dBmw
	Output LEV adjustable range	0-16 dB(0.5 dBstepping)
	Impedance	75Ω
	Output Return Loss	>=12 dB
General Features	Size	44mm´482´410mm
	Environment	0 ~ 45(Operating);-20 ~ 80(Storage)
	Power	220VAC±10%,50Hz,25W

Network Management:

 

QPSK Modulator parameter

QPSK Modulator