Display Wavefor
mData
If you do not have a deskew fixture, you
can use the controls in the Deskew menu to
set the oscill
oscope's deskew parameters
to recommended values, based on the
normal propagation delay of each probe.
The oscillos
cope automatically loads the
nominal propagation delay values of TekVPI
and TekProbe II (requires use of a TPA-BNC
adapter) p ro
bes. For other common probes,
first push Select on the side menu, and
select the channel to which the probe is
attached. T
hen push Probe Model on the
side menu, and select the probe model. If
your probe is not in the list, set the probe
model to Ot
her, and push Propagation
Delay on the side menu and dial in its
propagation delay with multipurpose knob a.
To display
the recommended deskew values
calculated by the oscilloscope, set Show
rec. deskews on the side menu to Yes.
To set the
deskew value of each channel to the
recommended value, push Set all deskews to
recommended value on the lower menu.
Quick Tips
Using Probes with the TekProbe II and TekVPI Interfaces. When you attach a probe with the TekProbe II or the
TekVPI interface, the oscilloscope sets the channel sensitivity, coupling, and termination resistance automatically to
match the probe requirements. Tek P robe II probes require use of the TPA-BNC Adapter.
The Difference Between Vertical Position and Offset. Adjust the vertical position to p lace the w aveforms where you
want to see them. The waveform baseline indicators indicate the zero Volts (or Amps) level for each waveform. If you
adjust the channel's Vertical Scale, the waveform expands or contracts around the waveform's baseline indicator.
When you use the Channel<x>> More > Offset > Vertical Offset control to move a waveform, the baseline indicator
no longer represents zero. Instead, it represents the level of the offset. If you adjust the channel's Vertical Scale, the
waveform expands or contracts around the waveform's baseline indicator.
50 and 75 Ω Protection. If you select 50 Ω or 75 Ω termination, the maximum vertical scale factor is limited to 1 V/div,
except that with a 10X probe the scale factor is 10 V. If you apply excessive input voltage, the oscilloscope automatically
switches to 1 MΩ termination to protect the internal 50 Ω or 75 Ω termination. For more details, refer to the specifications
in the DPO3000 Series Oscilloscopes Technical Reference.
MSO3000 and DPO 3000 Series Oscilloscopes User Manual 93
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