OD1402 - Lesson 1/Learning Event 1
Trig'd Indicator. Lights up to indicate that the main sweep is
triggered and will produce a display if the position and intensity
controls are properly adjusted.
triggering mode and indicate selection. They are as follows:
o Auto When pressed, sweep is initiated by the trigger signal
applied by the LEVEL and SLOPE controls, if the trigger frequency
is above 30 hertz and within the range