5/29/2023 0 Comments Calibrate receiver wwvA device driver specific to each reference clock must be compiled in the distribution however, most common radio, satellite and telephone modem clocks are included by default and are activated by configuration commands. Timezone and standard/daylight adjustments are performed by the operating system kernel.Ī reference clock will generally (though not always) be a radio timecode receiver synchronized to standard time as provided by NIST and USNO in the US, NRC in Canada and their counterparts elsewhere in the world. All reference clock drivers require that the reference clock use only Coordinated Universal Time (UTC). Information on how to support pulse-per-second (PPS) signals produced by some devices is on the Pulse-per-second (PPS) Signal Interfacing page. Additional information is on the Debugging Hints for Reference Clock Drivers and How To Write a Reference Clock Driver pages. Additional information about each reference clock driver can be found via links from this page. A general description of the reference clock support is on this page. NTP Version 4 supports almost four dozen satellite, radio and telephone modem reference clocks plus several audio devices for instrumentation signals. Reference Clock Support Reference Clock Support Master Time Facility at the UDel Internet Research Laboratory
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