Reference
Bottom Side Description
Vertical Offset Enables vertical offset adjustment with the
general purpose knob.
Offset
Setto0V Setsverticaloffsetto0V.
Voltage Probe
Current Probe
Use to set probe gain or attenuation for probes
that do not have the TekProbe II interface.
Deskew
Use to adjust the time skew correction for
each probe.
Probe Setup
Set to 0
Use to s et probe skew correction to zero.
Key Points
Using Probes with the TekProbe II Interface. When you attach a probe with
the TekProbe II interface, the oscilloscope sets the channel sensitivity,
coupling, and terminatio n resistance au tom atically to match the probe
requirements.
Vertical Preview. When you change the Vertical Position or Scale
controls while the acquisition is stopped or it is waiting for the next
trigger, the oscilloscope rescales and repositions the selected waveform
in response to the new vertical control s ettin gs. You may see a
clipped waveform if the original acquisition went off the screen. The
oscilloscope then uses the new settings for the next acquisition.
In contrast to ho rizontal preview, the math waveform, cursors, and
automatic measurements remain active and valid when using vertical
preview.
The Differe nce Between Vertical Position and Offset. Vertical position is a
display function. Adju st the Vertical position to place the waveform s
where you want to see them. The waveform b aseline locations track
adjustments made to the ir positions.
When you a djust vertical offset you see a sim ilar effect, but it is
actually quite different. Vertical offset is applied before the oscilloscope
preamplifier and can be used to increase the effective dynamic range
of the inputs. For exam ple, you can use vertical offset to look at small
variations in a large DC voltage. Set the Vertical offset to match the
nominal DC voltage and the signal appears in the center of the screen.
142 TDS3000C Series Oscilloscope User Manual
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