National Semiconductor has introduced a new video clock reference design, now available as a module for the Xilinx ML571 serial digital video development board. The module improves the jitter performance of the ML571 board’s SerDes-optimised Virtex-5 LXT FPGAs and enables video solutions to meet the stringent Society of Motion Picture and Television Engineers (SMPTE) 424M jitter specifications. The reference design module simplifies the development of video cameras, digital recorders, and video editing and post-production equipment. The ML571-1982CLK module delivers low clock output jitter of 40 ps peak-to-peak (at 148,5 MHz) and features National’s LMH1982 multirate video clock generator and LMH1981 sync separator devices. The LMH1982 produces a TOF timing pulse output and can generate two simultaneous SD and HD output clocks genlocked to the recovered H and V syncs from either a Virtex-5 LXT, or from the outputs of a LMH1981 sync separator.
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