Select a sampling mode
From the Horiz /Acq menu, select Sampling Modes, or select a sampling Mode in the Acquisition tab of the Horizontal/Acquisition
control window.
To use
To enable a sampling mode, click one of the Sampling Modes button.
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In Real Time, the instrument acquires all the points in a waveform record after one trigger event.
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In Interpolated time, the instrument interpolates between the samples it acquires when it cannot acquire all the real samples
it needs to fill up its waveform record after one trigger event. The instrument can interpolate either as part of an acquisition
or as part of the zoom/display behavior.
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In Equivalent time, the instrument uses multiple trigger events to fill all the points in its waveform record. Equivalent time
sampling begins when the time base setting (horizontal scale) is too fast for the instrument to acquire all the points in a
waveform in one trigger event.
NOTE. In real-time sampling, the instrument digitizes all of the points it acquires after one trigger event. Always use real-time or
interpolated sampling to capture single-shot or transient events.
Equivalent time sampling mode is not available on DPO70000SX instruments in multiscope mode.
Behavior
Equivalent Time mode lets you accurately acquire repetitive waveforms at sample rates much higher than the base analog-to-
digital converter sample rate. Equivalent time sampling is generally not useful for acquiring time-varying, random, or single-shot
events.
The instrument takes a few samples with each trigger event and eventually obtains enough samples to construct a waveform
record. The instrument takes samples independent of the trigger position and displays them based on the time difference
between the sample and the trigger. You should only use Equivalent Time mode on repetitive signals.
Horizontal and acquisition setups
194 DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series
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