QAM Modulator

GQ-3650 QAM Modulator is headend equipment with the professional broadcasting quality according to DVB standard. Its main function is modulating by QAM TS stream accorded to DVB and ATSC,and then transmitting via HFC or MMDS. The modulator converts input data stream up to DVB standard into Radio Frequency (RF) signals. The bandwidth is less than 8MHz in PAL system and the bandwidth is less than 6MHz in NTSC system. The signals according to DVB standard include MPEG-2 digital TV, digital broadcast, VOD, and other digital signals such as video conference, Internet and IP phone, which are up to DVB contribution protocol.

GQ-3650A QAM modulator applies to flexible frequency, GQ-3650B QAM modulator is used for a fixed frequency, and the GQ-3650C QAM modulator introduces Intermediate Frequency (IF).

GQ-3650 QAM Modulator is used in broad band digital application system such as HFC network, MMDS or 8GHz microwave-system. It not only transmit digital signals effectively, but also sends other digital value added services to thousands of families. GQ-3650 has the function of remote supervision and control.

Features:

          188/204 packet auto-identification, 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. 

          The function of NIT mapping and sending, supporting NIT mapping of over 44 frequency

          8 PID filtering and re-mapping

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

          Replace and insert SI information available.

          Inputs null data filtering and outputs data stuffing 

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

          Inputs the real time testing and displaying of the system and valid bite rate

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

          -20dB testing interface with IF output

          Failure alarming

          Power off memory

          LCD display

          ASI input (E3/DS3 optional)

          Various QAM working mode

          Network control interface realizes remote maintenance, supervision and software

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