Fluke 199B FE 192,196,199 C Users Manual - Page 26
Acquiring Waveforms, Selecting AC-Coupling, Reversing the Polarity of the Displayed, Waveform
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Fluke 192B - 196B/C - 199B/C 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