Display Wavefor
mData
Quick Tips
Preview. If you change the Position or Scale 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 w ill see when you next push RUN. T he 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 the vertical menu for the designated
waveform.
The vertical menu only affects
the selected waveform.
Pushing a channel button will also select or
cancel th
at waveform selection.
2. Push Cou pling repeatedly to s elect the
couplin
gtouse.
Use DC coupling to pass both AC and DC
components.
Coupling
DC|AC
Impedance
1MΩ|75Ω
50Ω
Invert
On |Off
Bandwidth
Full
(1) Label
More
Use AC coupling to block the DC component
and show only the AC signal.
Use Gro
und (GND) to display the reference
potential.
3. Push Impedance repeatedly to select the
input
impedance to use.
Set the input impedance (termination) to
50 Ω,75Ω,or1MΩ if using DC or Gnd
coup
ling. Input impedance is automatically
set to 1 MΩ when using AC coupling.
For more information on input impedance,
see Q
uick Tips. (See page 93, Quick Tips.)
4. Push Invert to invert the signal.
Select Off for normal operation and On
to i
nvert the polarity of the signal in the
preamplifier.
90 MSO3000 and DP O3000 Series Oscilloscopes User Manual
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