A slave clock is an unusual timepiece, since it has no own clock pulse generator from which it could count its impulse, it merely comprises a step-by-step switch, which is being controlled and adjusted by a central clock in certain intervals. By using such a system all clocks are dependent on the same source of time signals and therefore will show the same result. A divergency due to differences concerning the precision of the clockworks is consequently preventable. Corrections like clock shifts (e.g.normal time to summer time) can easily be carried out, because they are made centrally.
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