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T3DSO1000 A UserManual - P64

Peak Detect
In this mode, the oscilloscope acquires the maximum and minimum values of the signal
within the sample interval to get the envelope of the signal or the narrow pulse of the
signal that might be lost. In this mode, signal loss can be prevented but displayed noise
will increase.
In this mode, the oscilloscope can display all the pulses with pulse widths at least as wide
as the sample period.
Figure 19 Pulse With 0.1% Duty, Normal Mode
Figure 20 Pulse With 0.1% Duty, Peak Detect Mode
46 User Manual