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Briefing
Detailed
GQ-3731 Modulator is One-way ASI and Two-Way QPSK multiplexing COFDM Modulator, which can receive one-way ASI signal and two-way QPSK signal, and input single or combined signals for processing. The processed signals are then input into COFDM modulator, in which signals are processed in intermediate frequency and then unconverted into TV channel, thus making it easy to transmit in HFC, microwave MMDS network, etc. The signals can also be modulated and output directly through ASI interface. COFDM encoding is fully up to DVB standard and its output fulfilles DVB-T Standard.
Main Features:
Up to EN300744, FEC is fully up to DVB-T standard.
Support QPSK/16QAM/64QAM modulation.
Support 6MHz/7MHz/8MHz output.
Support 2K/8K carrier operation mode.
FEC encoding: 1/22/33/45/67/8
Support protect- alteration -time 1/4, 1/8, 1/16, 1/32
188 and 204 packet auto-identify, displaying input data format real time.
NIT mapping and sending, support 44 NIT mapping
8 groups PID filtering and re-mapping
Various PSI/SI information tables pick-up, parse and modification
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
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
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