MESSONDE FUR WERKZEUGMASCHINEN MIT DRAHTLOSER SIGNALUBERTRAGUNG

摘要

An optical signal transmission circuit for a probe is switched on by an optical switch-on signal comprising a burst 42 of pulses having a predetermined length. This is detected by a circuit which discriminates whether an input signal is a genuine switch-on signal or an interference burst 44, on the basis of the duration of the switch-on signal.