Fluke fluke123 User Manual

Page of 77
Fluke 123
Users Manual
26
Selecting AC-Coupling
Use AC-coupling when you wish to observe a small  AC
signal that rides on a DC signal.

Open the SCOPE INPUTS menu.
ô
Highlight AC.
í
 (4x)
Accept AC-coupling for INPUT A.
Reversing the Polarity of the Displayed
Waveform
To invert the input A waveform, do the following:

Open the SCOPE INPUTS menu.
ô
Select NORMAL (of INPUT A).
í
Highlight INVERT.
÷
 (3x)
Accept inverted waveform
display.
For example, a negative-going waveform is displayed as
positive-going, providing a more meaningful viewing
perspective in some cases. An inverted display is
identified by trace identifier 
A
 on left of the waveform
area.