Features Specifications:QAM Modulator  DMB-5100 CATV QAM Modulator not only succeeds to DMB-5000 high reliability and stability, but also provides user with powerful additional functionalities. The Modulator can receive QPSK signal, QAM signal, or DS3 signal directly to extract MPEG TS. The MPEG TS can be multiplexed with other MPEG TS from ASI to one MTPS. Finally the MTPS will be send to QAM modulation module to realize DVB-C modulation and upconvert to RF. The modulator can meet all of the requirements of Digital Cable TV operators economically and effectively. Main features: Comply to ITU-U J.83, Annex A (DVB), B(Open Cable)PID filter and remapping can be configuredPSI/SI information updating possibleFilling MPEG TS automatically and delete empty packet intellectivelyPCR correction supported188/204 data packet adaption automaticallyRF output frequency scope 48~862MHz, in 0.1MHz stepOutput level can be adjusted in 100~113dBuVPowerful MPEG TS remux and QAM modulation conversionFront panel -20dB RF testing output provided Parameter record when power off, it can store 99 channels parametersWeb browser remote control, network upgrade supported Specification MPEG TS Input 1 DVB-ASI input Comply to EN50083-9 ASI connecter Effective bit rate 1Mbps~54Mbps ASI mode BYTE or BURST MPEG frame 188/204 data packet  Return loss ≥10dB  Connector 75ohm BNC DS3 Input(Optional) Max input bite rate 44.736Mbps  Format Comply to G804/G752 standard Connector 75ohm, BNC DS3 Output(Optional) Max input bite rate 44.736Mbps  Format Comply to G804/G752 standard Connector 75ohm BNC QPSK Input Input frequency scope 950~2150MHz Input level -25~ -65dBm Symbol rate 2~45MBauds Rolling off Factor 0.35 FEC 1/2,2/3,3/4,5/6,7/8 Interleave depth I=12 Polarization 0/13V/18VOptional Connector 75ohm, F type  MPEG TS output  2 DVB-ASI output Comply to EN50083-9 ASI connecter Max bite rate 170Mbps  Effective bit rate 2Mbps~51.6Mbps ASI mode BYTE or BURST MPEG frame 188/204 bytes packet  Connector 75ohm, BNC RF Output Output frequency 48MHz~862MHz  Output level 100dBuV~ 113 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 QAM parameter  Mode 16, 32, 64, 128, 256 QAM Bandwidth ≤8MHz