Sample Mode; Sample Rate - Rigol DS4024E User Manual

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Sample Mode

This oscilloscope only supports real-time sampling. In this mode, the oscilloscope
samples and displays waveforms within a trigger event.
Tip
When the sample is stopped, the oscilloscope will hold the last display. At this
point, you can still use the vertical control and horizontal control to pan and zoom
the waveform.

Sample Rate

Sample refers to the process that the oscilloscope converts analog signals to digital
signals at a certain time interval and stores the data in order. The sample rate is the
reciprocal of the time interval.
The real-time sample rate of DS4000E is up to 2 GSa/s for each channel. The current
sample rate is displayed in the status bar at the upper side of the screen and in the
Sa Rate menu (press Acquire  Sa Rate). You can change the sample rate
indirectly by modifying the horizontal time base (refer to "To Adjust the
Horizontal Time Base") or memory depth (refer to "To Set the Memory
Depth").
The influence on the waveform when the sample rate is too low:
1. Waveform Distortion: when the sample rate is too low, some waveform
details are lost and the waveform displayed is rather different from the actual
signal.
4-2
Chapter 4 Sample System Setting
DS4000E User's Guide