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AC-100-WWVB Time Receiver; AC-500-MSF Time Receiver; ClockWatch Radio Sync [20] F6CTE's CLOCK [15] WWV: 2.5, 5, 10, 15, and 20 MHz AM Voice with modified IRIG-Hformat time code on 100 Hz sub-carrier (CCIR code) HF radio and antenna (plus software if automatic updating of computer time is desired) TrueTime TL-3 WWV Receiver
Clock synchronization is a topic in computer science and engineering that aims to coordinate otherwise independent clocks.Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks counting time at slightly different rates.
A clock network or clock system is a set of synchronized clocks designed to always show exactly the same time by communicating with each other. Clock networks usually consist of a central master clock kept in sync with an official time source, and one or more slave clocks which receive and display the time from the master.
In a one-way time transfer system, one end transmits its current time over some communication channel to one or more receivers. [4]: 116 The receivers will, at reception, decode the message, and either just report the time, or adjust a local clock which can provide hold-over time reports in between the reception of messages. The advantage of ...
Stations without the ability to acquire a time signal accurate to at least one second should request a time check at the start of every shift, or once a day minimum. Stations may ask the NCS for a time check by waiting for an appropriate pause, keying up and stating your call sign, and then using the prowords "REQUEST TIME CHECK, OVER" when the ...
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Thomas Edison achieved synchronization in his stock ticker with a clunky but effective unison mechanism to resynchronize periodically. [2] In the teleprinter world, Howard Krum finally came up with a good decoding mechanism for async signals around 1912. [3] Synchronization remained a problem well into the electronic era.
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