Fluke PM3370B user manual Trigger Level, Press the ’level-pp’ softkey to turn it off

HOW TO USE THE INSTRUMENT 4 - 35

TRIGGER LEVEL

-Press the ’level-pp’ softkey to turn it off.

TRIGGER

LEVEL

The automatic level detection circuitry is turned off. The trigger level is no longer clamped within the peak-peak range of the signal. You must adjust the proper trigger level. While you turn the TRIGGER LEVEL control, the actual trigger level is displayed in (m)V.

An indicator ’T-’ is displayed next to the channel identifier when the combination of trigger coupling and channel input coupling is useful (both ac coupled or both dc coupled).

When the ’T-’ is within the signal range, a stable display of the signal is obtained. When proper triggering takes place, the ARM’D LED is off.

Use the TRIGGER LEVEL control to move the indicator (T-) vertically.

T-

TRIGGER

LEVEL

T-

ST6738

When the trigger level indicator (T-) is outside the signal range, triggering is lost. Because of the nature of the (Probe Adjust) input signal, it appears that only two lines are drawn. The timebase is not properly triggered, as is indicated by the ARM’D LED being turned on.

Note:	’T-’ is an indication for reference only. Its position can differ slightly from
	the actual trigger level.