66 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide3 Vertical Controls1 Press the desired channel key.2 In the Channel Menu, press the Coupling softkey to select the input channelcoupling:• DC — DC coupling is useful for viewing waveforms as low as 0 Hz that do nothave 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 waveformthat removes any DC offset voltage from the waveform.Note that Channel Coupling is independent of Trigger Coupling. To change triggercoupling see “To select the trigger coupling" on page 149.To specify bandwidth limiting1 Press the desired channel key.2 In the Channel Menu, press the BW Limit softkey to enable or disable bandwidthlimiting.When bandwidth limit is on, the maximum bandwidth for the channel isapproximately 20 MHz. For waveforms with frequencies below this, turningbandwidth limit on removes unwanted high frequency noise from the waveform.The bandwidth limit also limits the trigger signal path of any channel that has BWLimit turned on.To change the vertical scale knob's coarse/fine adjustment setting1 Push the channel's vertical scale knob (or press the channel key and then theFine softkey in the Channel Menu) to toggle between fine and coarseadjustment of the vertical scale.TIP If the channel is DC coupled, you can quickly measure the DC component of the signal bysimply noting its distance from the ground symbol.If the channel is AC coupled, the DC component of the signal is removed, allowing you to usegreater sensitivity to display the AC component of the signal.
