The QAM modulator is widely used in the front-end of CATV system, It can modulate the MPEG-2 stream to RF signal using Quadrature Amplitude Modulation mode. The modulator support a full range of variable QAM mode, data rates and signal bandwidths. It fits in any 19" rack, occupying only 1 unit of space. 

Features: 
. Digital process as per TS300 429 definition 
. Complies fully with ITU-T J. 83 standard, annex A (DVB/DAVIV)
. Support a full range of variable data rates, signal bandwidths and QAM constellation
. R-S encoder, 188/204-byte auto-detection
. RF level 110dBuV~120dBuV adjustable 
. Support multiple network input interface (ASI/E3/DS3 etc. (optional)), with signal loop-through output. 
. With IF&RF output, and IF input loop 
. Bit stuffing 
. Network management, full remote control and diagnostics (only for QAM3420)
. RF output test point (-20dB)
. Front panel VFD and buttons for easy setup
. Automatic memory 
. 100~240VAC power supply or -48VDC power supply
. Standard 19" rack mount