1) If the pattern on the screen of the oscilloscope appears to be unstable, i.e., "running" uncontrollably horizontally, which of the following group of controls would you first suspect needs adjusting to get the signal to become stable?

A. One of the controls in the VERTICAL  group of controls.

B. One of the controls in the HORIZONTAL  group of controls.

C. One of the controls in the TRIGGER  group of controls.

D. One of the VAR  controls.

Answer rating: 100% (QA)

Correct option is c The Trig and Level knobs con... View the full answer