Exact time clock9/3/2023 One or more ports receive timing on while one or more to send time out. The Masters can also be known as a boundary clock, which is a clock source that has more than one network port. The Grandmaster is the primary time source for the hierarchy and will typically get time from a GPS or atomic clock. From there, clocks on the individual segments (networks) would be Members and feed time from the Masters. A typical configuration would have a Grandmaster clock as the ultimate time source, and the Master clocks would feed from the Grandmaster thereby acting as Members. IEEE 1588 defines a hierarchical master-member architecture for clock distribution. Its intended use is over local area networks, such as Ethernet. PTP uses a lightweight packet structure that requires very little bandwidth to operate, and it’s important to note it uses a different structure for distributing time compared to NTP. Many of the changes done in the 2008 update were to accommodate the needs of the power industry but can useful with any application that requires precise timing. Timing precision improves network monitoring accuracy, supportability and troubleshooting of the grid. The primary use case for PTP that I’ve dealt with is in the power industry with smart grid power automation applications such as peak-hour billing, virtual power generators and outage monitoring and management these applications require extremely precise time. PTP was developed for packet based network for control and measurement systems. It is also known as PTPv2 and is not backward compatible with the older version. In 2008, the IEEE released a revised standard for PTP, known as 1588-2008, that improved the accuracy and precision of the protocol. PTP standard was first released in 2002 and known as 1588-2002. PTP is IEEE standard 1588 that can give local computing systems accuracy within the sub-microsecond range (such as microsecond, nanosecond or picoseconds) whereas NTP is within milliseconds or longer. However, operating system delays may degrade the accuracy to some degree.Precision Time Protocol (PTP) is a protocol designed to go beyond what Network Time Protocol (NTP) can offer relative to accuracy. In most cases, the displayed time is correct to within an uncertainty equal to the network delay. The network delay can be used to estimate the uncertainties in the displayed official time and the clock offset. The network delay is equal to one half the period of time it takes for a roundtrip exchange of messages between your device and NRC's atomic clocks. You can adjust your device's clock manually, or have it set automatically through the use of Network Time Protocol (NTP). thousands of seconds), check that your computer settings for the date, time zone, or daylight saving time are correct. The offset of the clock in your device from NRC official time is also shown ('Your local clock is _ seconds fast / slow'). For more information on Canadian time zones consult Time zones & daylight saving time. If you are outside North America, the display will show UTC (Coordinated Universal Time – the modern implementation of Zulu time or GMT). If you are in North America, the display will usually show time according to your time zone. The time displayed is corrected for measured network delays. Your computer or mobile device receives the official time through a periodic exchange of time-stamped messages between your device and NRC's time source. The time displayed on your screen is derived from Canada's official time source: NRC's atomic clocks. How is the official time displayed on my screen?
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