The hitless switch provides a glitch-free transition from one input source to another, ensuring reliable and disturbance-free outputs, even in the event of failure of one of the input sources. Multiple redundant external frequency references can be applied to a hitless switch (passive combiner) located on each frequency synthesizer circuit card. The 56000 backplane can accept 1, or 10 MHz IRIG B time code and any TTL signal from DC to 10Mbps. The modular architecture supports various clock rates and frequencies required in today’s sophisticated communcations applications. The Symmetricom / True Time 56000 Modular Time and Frequency Distribution System is a versatile Data Rate Clock (DRC) and Distribution System supporting an extensive variety of input references, oscillators, output frequencies, input/output interface styles, powerful network based management tools, and complete power supply plans. H XLi Time & Frequency System User Guide Issue 8- June 2008 Manual Part Number: XLi-User Manual. XLi Time & Frequency System XLi-man, Issue 8, 6/17/08, Rev. Microsemi / Symmetricom / TrueTime 56000 Modular Time and. This Symmetricom / True Time 560-5155 1/5/10 MHz Frequency Synthesizer is new from.
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