Pulse-per-second signal

<p>A pulse per second (PPS or 1PPS) is an <a href="/facts/Electrical_signal/41YqUJ8c">electrical signal</a> that has a width of less than one second and a sharply rising or abruptly falling edge that <a href="/facts/Accuracy_and_precision/JQ47xXDq">accurately</a> repeats once per <a href="/facts/Second/jtFxnJXx">second</a>. PPS signals are output by radio beacons, <a href="/facts/Frequency_standard/VrTvqGam">frequency standards</a>, other types of precision <a href="/facts/Oscillator/6vSrm84a">oscillators</a> and some <a href="/facts/Global_Positioning_System/DKVLnzF3">GPS</a> receivers. Precision clocks are sometimes manufactured by interfacing a PPS signal generator to processing equipment that aligns the PPS signal to the <a href="/facts/UTC/2EnjfSyu">UTC</a> second and converts it to a useful display. <a href="/facts/Atomic_clock/MF8nsXDR">Atomic clocks</a> usually have an external PPS output, although internally they may operate at <a href="/facts/Second/jtFxnJXx">9,192,631,770 Hz</a>. PPS signals have an accuracy ranging from 12 picoseconds to a few microseconds per second, or 2.0 nanoseconds to a few milliseconds per day based on the resolution and accuracy of the device generating the signal.
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Pulse-per-second signal open-in-new

Pulse-per-second signal