2-channel multiplexing QAM modulator

GQ-3682  ASI,COFDM 2-channel multiplexing QAM modulator is a headend and repeat equipment with the professional broadcasting quality according to DVB standard . Its main function is decoding signals modulated by COFDM up to DVB-T to TS stream and remultiplexing with other ASI signasl and then modulating digital TV signal up to QAM standard transmitted via HFC or MMDS. The modulator converts input data streams up to DVB-T standard into Radio Frequency (RF) signals. It could extend ground broadcasting transport network and converter interface in the headend. It not only transmit digital signals effectively, but also sends other digital value added services to thousands of families. GQ-3682 has the function of remote supervision and control.

  Features

        Two Channels input interface( ASI and COFDM), with ASI and COFDM loop output.

        -20dB RF testing interface with IF output

        IF and RF output optional

        ASI input data bit rate:216Mbps(max, per channel)

        Remultiplex 2 channels TS

        PID filtering and reset, users add and delete programs at will, auto-mapping PID of program selected. Support user-defined PID and input bypass.

        Support ITU-T J.83A and B

        FEC up to DVB-C

        Work in mode 16QAM, 32QAM, 64QAM, 128QAM, 256QAM

        Input interface ASI/RF/COFDM tuner

        Input RF COFDM frequency 170MHz-860MHz

        Input RF BW6MHz7MHz8MHz

        Inside-feedback electricityRF input supply DC+9V or DC+12V

        Input data(ASI interface) bit rate:1.551.6Mbps

        Output data bit rate:256Mbps

        Output signals BW1.158.05MHz(the Fall is 0.15)

        Output data symbol ratio17Mbaud/s

        Output RF frequency48-860MHz

        Output level100dBuV115dBuV(stepping available)

        188 and 204 packet auto-identify, displaying input data format real time.

        Large cache, ASI interface support input burst and average bit stream, reforming bit stream average in order to promote the output bit stream efficiency.

        NIT mapping and sending, support 44 NIT mapping

        PID filtering and re-mapping 

        Various PSI/SI information tables pick-up, parse and modification (customization available).

        SI information replacement and insertion

        Input data null packet filtering and output data stuffing

        PCR correction function can correct various input data, respectively and accurately

        Show and inspect system input bit rate and valid bit rate real-time

        -20dB RF testing interface with IF output

        Outstanding self-adapting filtering circuit designs to maximal reliability and availability.

        Error alarming

        LCD display

        Network interface introduces remote maintenance, supervision and software upgrade

        Power off memory

        Network interface introduces remote maintenance, supervision and software upgrade