Digital TV Headend Qpsk Modulator

outline
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.
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.
features
� interface comply with asi standard
� comply with dvb-sets300-421 qpsk modulating standard
� frequency output range 950-2150mhz(it can be set as users' needs)
� out interface to connect 10m oscillator
� big input stream
� support input system efficient rate real time detect display and alarm display
� output level is adjustable from 0-20db,0.5db/step through adjust the panel.
� capacity stable and reliable, strong anti-jamming
� rf level output delay
� adopt dds, high stabilization of output frequency, narrow frequency step, low phase noise
specifications
modulate mode
qpsk
input port
asi standard
output port
50î© n head
input ts level
(800â±10)mv
frequency output range
(1238~1278)mhz
output frequency adjustable step
wide:125khz, narrow:5hz
10m oscillator input level
�10dbm
max output level
�0dbm
output level adjustable range
0~20db(0.5 db step)
symbol rate
3~10mbauds
fec
1/2,2/3,3/4,5/6,7/8 for random option
miscellaneous
dimension
482mmã�330mmã�45mm
temperature
0~45â°c(work);-20~80â°c(storage)
power
110~220vacâ±10%,50/60 hz,25w
installation hole distance
460mm