Acquire the Signal
Real-Time Sampling
Record points
MDO4000 Series oscilloscopes use
real-time sampling. In real-time sampling,
the instrument digitizes all of the points it
acquires using a single trigger event.
Sampling rate
Waveform Record
The instrument builds the waveform record through use of the following parameters:
Sample interval: The time between
recorded sample points. Adjust this
by turning the
Horizontal Scale
knob
or pushing
Acquire
and changing the
record length in the Acquire menu.
Record length: The number of samples
required to
fi
ll a waveform record. Set
this by pushing the
Acquire
button and
using the resulting lower- and side-bezel
menus.
Trigger point: The zero time reference in
a waveform record. It is shown on the
screen by an orange T.
Horizontal position: When
Delay Mode
is on, this is the time from the trigger
point to the expansion point. Adjust this
by turning the
Horizontal Position
knob.
Use a positive time to acquire the record
after the trigger point. Use a negative
time to acquire it before the trigger point.
Expansion point: The point that the
horizontal scale expands and contracts
around. It is shown by an orange triangle.
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MDO4000 Series Oscilloscopes User Manual
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