Fluke 192, 199, 196 user manual Acquiring Waveforms, Selecting AC-Coupling

Fluke 192/196/199

Users Manual

Acquiring Waveforms

Selecting AC-Coupling

After a reset, the test tool is dc-coupled so that ac and dc voltages appear on the screen.

Use ac-coupling when you wish to observe a small ac signal that rides on a dc signal. To select ac-coupling, do the following:

1 Display the INPUT A key labels.

2 Highlight AC.

Observe that the bottom left of the screen displays the ac-coupling icon: .

Reversing the Polarity of the Displayed Waveform

To invert the input A waveform, do the following:

1 Display the INPUT A key labels.

2 Open the Input A menu.

3	Select Inverted and accept
	inverted waveform display.

4 Exit the menu.

For example, a negative-going waveform is displayed as positive-going waveform which may provide a more meaningful view. An inverted display is identified by an inversed trace identifier ( ) at the right of the waveform.

18