connected to the point in the circuit whose voltage with respect to ground you wish to measure. If the current
in the circuit is periodic, the oscilloscope can be made to synchronize itself to this signal so that the plot of
voltage vs. time appears “frozen” on the screen.
The oscilloscope often has two or more independent measurement “channels” can also be made to plot
one voltage in the circuit vs. another, by using two probes and two different channels.
24.6 Logic Probe
Alogic probeis used in digital circuits to indicate whether a point in a circuit is at a logic “high” or logic
“low” value.