50 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
3 Vertical Controls
The voltage value momentarily displayed in the upper right portion of the display
represents the voltage difference between the vertical center of the display and
the ground level ( ) icon. It also represents the voltage at the vertical center of
the display if vertical expansion is set to expand about ground (see "To choose
"expand about" center or ground" on page 237).
To specify channel coupling
Coupling changes the channel's input coupling to either AC (alternating current)
or DC (direct current).
1 Press the desired channel key.
2 In the Channel menu, press the Coupling softkey to select the input channel
coupling:
• DC — DC coupling is useful for viewing waveforms as low as 0 Hz that do not
have large DC offsets.
• AC — AC coupling is useful for viewing waveforms with large DC offsets.
AC coupling places a 10 Hz high-pass filter in series with the input waveform
that removes any DC offset voltage from the waveform.
Note that Channel Coupling is independent of Trigger Coupling. To change trigger
coupling see "To select the trigger coupling" on page 124.
To specify bandwidth limiting
1 Press the desired channel key.
2 In the Channel menu, press the BW Limit softkey to enable or disable bandwidth
limiting.
If the channel is DC coupled, you can quickly measure the DC component of the signal by
simply noting its distance from the ground symbol.
If the channel is AC coupled, the DC component of the signal is removed, allowing you to use
greater sensitivity to display the AC component of the signal.
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