Basic Operation
DSO8000E Series HandHeld Oscilloscope User Manual 45
Peak Detect: Use this mode to detect glitches within 10ns and to limit the possibility of aliasing.
This mode is valid at the TIME/DIV setting of 4µs/div or slower. Once you set the TIME/DIV setting
to 4µs/div or faster, the acquisition mode will change to Normal because the sample rate is fast
enough that Peak Detect is unnecessary. The oscilloscope does not display a message to tell you
that the mode has been changed to Normal.
Average: Use this mode to reduce random or uncorrelated noise in the signal to be displayed.
Acquire data in Normal mode and then average a great number of waveforms. Choose the
number of acquisitions (4, 16, 64 or 128) to average for the waveform.
Stop the Acquisition: When you are running the acquisition, the waveform display is live. Stop
the acquisition (press the RUN/STOP button) to freeze the display. In either mode, the waveform
display can be scaled or positioned by vertical and horizontal controls.
Equivalent Acquisition: Just repeat the Normal acquisition. Use this mode to take a specific
observation on repeatedly displayed periodic signals. You can get a resolution of 40ps, i.e.
25GSa/s sample rate, which is much higher than that obtained in real-time acquisition.
The acquisition principle is as follows.
As shown above, acquire input signals (cycle repeatable) for more than once at a slow sample rate,
arrange the sample points by the time they appear, then recover waveforms.
Sample Points