Fluke PM3370B user manual Delayed Timebase Trigger Level, Delayed Timebase Coupling

HOW TO USE THE INSTRUMENT 4 - 67

DELAYED TIMEBASE TRIGGER LEVEL

Just as is the case for Main Timebase triggering, proper triggering of the Delayed Timebase depends on the selection of the proper trigger level.

The Δ symbol in the Delayed Timebase trigger menu indicates the Δ control to be used to adjust the trigger level.

If the coupling for the vertical channel and the triggering are the same, a trigger level indicator is visible (D-).

If you have set up for triggered operation of the Del’dTB as described in the previous section, and the Del’dTB trace is not displayed, the trigger level needs adjustment.

Adjust the Δ control until the Del’dTB signal is visible.

1-

Δ

1- D-

D-

D−: DTB TRIGGER LEVEL INDICATOR ST6729

DELAYED TIMEBASE COUPLING

The Del’dTB permits the same trigger coupling selection as for the MainTB (ac, dc, LF-rej, HF-rej). The level indication ’D-’ (for Del’dTB) is present only when the combination of the Del’dTB trigger coupling and the input coupling is useful.