Memory Depth - Tenma 72-7615 Manual

Sampling Mode is when the oscilloscope reconstructs the waveform by sampling
signals at regular intervals.
To avoid mixed envelope, select Peak Detect. In this mode the oscilloscope identifies
the maximum and minimum values of the input signals at each sampling interval and
use these values to display the waveform.
Average Mode is when the oscilloscope acquires several waveforms and take the
average value to display the final waveform. You can use this mode to reduce random
noise. To reduce random noise of the displayed signal, select average sampling and
increase the average number of times in multiples of 2 ie: selecting from 2 to 256.

Memory Depth

Deep memory is required in order to view more waveform detail, and with help of Zoom
function, waveform detail is show clearly on the screen, which prevent waveform details
becoming too compressed to observe clearly when signal frequency gets higher.
Deep Memory allows 10000 x amplification compared to 10 x for normal memory.
Waveform Display after Zoom-in under Waveform Display after Zoom-in under
Normal Mode Deep Memory
Note:
Please select Peak Detect mode if you want to observe signal envelope and also to
avoid noise. If the timebase is greater than 100ms/div and deep memory is used, please
set trigger mode to Single or Normal.
Deep memory and fast acquisition cannot apply at the same time.
Fast Acquisition
Fast acquisition helps capture waveforms at high speed and up to 150,000wfms/s.
With this function, the operator can view any glitches or other transient signal just in a
few seconds.
Waveform Display not using fast Waveform Display using fast
acquisition mode acquisition mode
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