Display Wavefor
morTraceData
Quick Tips
Preview. If you c hange the Position or S cale controls when the acquisition is stopped or when it is waiting for the next
trigger, the oscilloscope rescales and repositions the relevant waveforms in response to the new control settings. It
simulates what you will see when you next push the RUN button. The oscilloscope uses the new settings for the next
acquisition.
You m ay see a clipped waveform if the original acquisition went off the screen.
The math waveform, cursors, and automatic measurements remain active and valid when using preview.
Setting Input Parameters
Use the vertical controls to select waveforms, adjust the waveform vertical position and scale, and set input parameters.
1. Push a channel menu button 1, 2, 3,or4 to
bring up th
e vertical m enu for the designated
waveform. The vertical menu only affects
the selected waveform.
Pushing a channel button will also select or
cancel that waveform selection.
2. Push Cou pling repeatedly to s elect the
coupling to use.
Use DC coupling to pass both AC and DC
components.
Coupling
DC|AC
Termina-
tion
1MΩ|50Ω
Invert
On |
Off
Bandwidth
Full
(1) Label
More
Use AC coupling to block the DC component
and show only the AC signal.
3. Push Term ination repeatedly to select the
input impedance to use.
Set the input impedance (termination) to
50 Ω or 1 MΩ if using DC coupling. Input
impedance is automatically set to 1 MΩ
when using AC coupling.
For more information on input impedance,
see Quick Tips. (See page 105, Quick
Tips.)
4. Push Invert to invert the signal.
Select Off for normal operation and On
to invert the polarity of the signal in the
preamplifier.
102 MDO4000 Series Oscilloscopes User Manual
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