58 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
3 Vertical Controls
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 138.
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.
When bandwidth limit is on, the maximum bandwidth for the channel is
approximately 20 MHz. For waveforms with frequencies below this, turning
bandwidth limit on removes unwanted high frequency noise from the
waveform. The bandwidth limit also limits the trigger signal path of any
channel that has BW Limit turned on.
To change the vertical scale knob's coarse/fine adjustment setting
1 Push the channel's vertical scale knob (or press the channel key and
then the Fine softkey in the Channel Menu) to toggle between fine and
coarse adjustment of the vertical scale.
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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