Reference
76 TDS1000/2000-Series Digital Oscilloscope User Manual
Peak Detect. Use Peak Detect acquisitionmode to detect glitches as
narrow as 10 nsand to limit the possibility of aliasing. This mode is
effective when at the SEC/DIVsetting of 5 s/div or slo wer.
12 345
Peak Detect mode displays thehighest and lowest acquired voltage in each
interval.
Sample points displayed
Peak Detect acquisition intervals (1250)
NOTE. If you set the SEC/DIV setting to 2.5s/di v or faster, the
acquisition modechange sto Sample bec auset he samplerate i sfast
enough that Peak Detect is not necessary. The oscilloscope does not
display a message to tell you that the mode was changed to Sample .