Question

In general, when using a scope to troubleshoot digital systems, the instrument should be triggered by ____________

(a) The A channel or channel 1

(b) The vertical input mode, when using more than one channel

(c) The system clock

(d) Line sync, in order to observe troublesome power line glitches

This question was posed to me by my school principal while I was bunking the class.

This interesting question is from Propagation Delay in Ripple Counter topic in portion Counters of Digital Circuits

Answer 1

Right answer is (c) The system clock

The best I can explain: All the information is sent from one end to another end through the clock pulse which behaves like a carrier. So, for troubleshooting it should be triggered by the same. Since the system clock is internally produced.