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