QPSK Modulator

1.1 Outline JXDH-6502 QPSK digital TV modulator adopts advanced digital signal processing technology, of which receiving port can directly use digital satellite receiver for receiving, thus fully complying DVB-S standard.

Not only can it gain relatively high frequency spectrum usage ratio, having very strong anti-interference and relatively high price performance ratio, but also it can well comply analogue FM microwave equipment.

JXDH-6502 QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution coding, and pre-modulating baseband shaping processing, etc. all these contribute a high guarantee to the data transmitting performance.

1.2 Features • Comply with DVB-SETS300-421 QPSK modulating standard； • Frequency output range 250-750MHz、450-1000MHz、950-2150MHz for random option; • Build-in DDS frequency synthesizer, support L band uplink frequency conversion; Support minimum 5MHz adjustment of the output frequency; • Support input system efficient rate real time detect display and alarm display; • Output level is adjustable from 0-20dB through adjust the panel, 0.5dB per level; • Interface meet ASI standard; • Capacity stable and reliable, strong to anti-jamming.

Apply ● MMDS digital TV head end; ● Satellite digital TV broadcasting; ●Terrestrial digital TV; ●Image Supervise; ● Video-On-Demand（VOD）; ● Long-distance teaching; ●Video Conference.

1.3 Performance indicators Modulate mode QPSK Input port ASI standard port Input TS stream range 800mV±10 Output port 75Ω F head Male Frequency output range 250～750MHz 、450～1000MHz、950～2150MHz，optional Output frequency tune stepping Glance: 125KHz，Fine: 5Hz(Customize) Max Output level ≥0dBm Output level adjustable range 0~20dB（0.5 dB stepping） Symbol rate 3～45MBauds FEC 1/2、2/3、3/4、5/6、7/8 for random option Ext 10MHz source input range ≥10dBm Outside Band noise restrain ≧50dB Output monitoring level -20dB，compareed with output level Miscellaneous Dimension 44mm×482mm×330mm Temperature 0~45℃（work）；-20~80℃（storage） Power 110-220VAC±10%，50/60Hz，25W Installation hole distance 460mm