QPSK modulator

1.high quality/price rate 2.port:ASI,BNC 3.maximum PID:72 4.input lenghth:188/204 byte

Brief introduction

JD-QPSK-1100 QPSK modulator meets the channel coding and modulating standard for DVB-S. The advanced digital signal processed technology is adopted to compress coding through MPEG-2 and transmit TV signal TS(after crossover and processing with other data stream) to QPSK modulator to process QPSK channel coding and modulating, supply with medium-frequency output or RF (fixed or frequency agility)output.

JD-QPSK-1100 QPSK modulator adopts random process for energy dispersal, RS coding, convolution interleaving, contracting convolution coding, and base band shaping process before modulating, to guarantee the reliable transmission performance and stability.

Features

l         Meet the modulating standard of DVB-S ETS 300~421QPSK

l         Frequency output range: 450MHz~950MHz

l         Internally installed with frequency synthesizer, support variable frequency 450MHz~950MHz within L frequency range

l         RF are fixable or frequency agility output

l         Supply with RF output monitoring port (-30dB)

l         Supply with DVB ASI/SPI input interface and looping out interface, with reliable performance and strong anti-jamming ability

l         Front panel LCD shows key control parameters and controls operation, with Chinese and English menu selection

l         LED state display and warning indication (warning for input code rate unlocked and data spilling)

l         Support 10M/100M Ethernet control interface, and shall upgrade on line through network

l         Local/long-distance control and central management are available through network management system

l         19” 1U rack

Technical parameter

Modulation	QPSK
Input interface	ASI (BNC-75Ω)
Output interface	F type interface (75Ω)
RF output range	450~950MHz
Output signal broadband range	≤56 MHz
Symbol rate	2~45MBauds
FEC encoder	1/2, 2/3, 3/4, 5/6, 7/8
RS encoder	(204/188) .7=8
SNR	≥45dB
Channel encoding standard	DVB-S
Output level	≥0dBm
Output level range	0~20dB(0.5dB stepping)
Power supply	220V(180V~250V), 50Hz~60Hz, 20VA
Size	44mm×482mm×430mm(H×W×D)
Installment pitch of holes	460mm

QPSK modulator