4 ms·
AC grid frequency is much more stable than any crystal oscillator. After any number of years, AC will, on average, drift 0 seconds from UTC. It's being sync'd u
by zaarn 9y ago
AC grid frequency is much more stable than any crystal oscillator. After any number of years, AC will, on average, drift 0 seconds from UTC. It's being sync'd using atomic clocks to keep it as perfect as possible precisely because people use it as clock.
- mcv 9y agoWhich is better depends on whether you need short term accuracy or long term. On the long term, grid clock is more accurate. In the short term, crystals are more accurate.