Detailed Description QAM Modulator(DMB-5000 model) for DVB-C System is the key equipment of Digital Cable Television network. It receives MPEG TS via ASI interface, realizes DVB-C channel encoding and QAM modulation, then output intermediate frequency signal, finally upconvert intermediate frequency signal into RF signal. With digital IF modulation, the QAM modulator has the high performance of MER, carrier-to-noise ratio, phase noise, margin of error, etc. It also supports PID filtrating & mapping and PSI/SI updating. For the best performance and high stability, our DMB-5000 QAM Modulator is the best choice of the DTV operators. Main features The signal coding comply to ITU-T J.83PID filtrate and remapping can be configuredPSI/SI information updating possibleFilling MPEG TS automatically and delete empty packet intellectivelyPCR emendation supported188/204 data packet adaption automaticallyRF output frequency scope 48~862MHz, in 0.1MHz stepOutput level can be adjusted correctly in 108~118dBuVWeb browser remote control, network upgrade supported Specification MPEG TS Input2 ASI input Comply to EN50083-9 ASI connecter Effective bit rate 1Mbps~51.6Mbps ASI mode BYTE or BURST MPEG frame 188/204 data packet  Connector 75ohm, BNC MPEG TS output1 DVB-ASI loop through Comply to EN50083-9 ASI connecter Effective bit rate 1Mbps~51.6Mbps ASI mode BYTE or BURST MPEG frame 188/204 data packet  Connector 75ohm, BNC RF OutputOutput frequency 50MHz~860MHz  Output level 105dBuV~ 121 dBuV (adjustable) Output return loss ≥10dB I/Q amplitude unbalanced 0.1%  I/Q quadrature error 0.1º Phase jitter 0.5º RMS Outband restrain 55dB MER 33dB C/N 45dB Connector 75ohm, F type QAM parameter Mode 16, 32, 64, 128, 256 QAM Symbol rate 3.5~7 Mbaud/s Width ≤8MHz ControlFront Panel LCD display & cursor/execute keys Web Server Embedded PowerVoltage AC 90~260V  Frequency 50~60Hz Consumption Max. 30W Mechanical ParameterOperational temperature -10~50oC Storage temperature -10~70oC Humidity 10%-95% Dimension 318mm(W)×483(L)mm×44mm(H) Weight 6kg