Time Base - Tektronix TPS2000 Series User Manual

Sample. In this acquisition mode, the oscilloscope samples the signal
in evenly spaced intervals to construct the waveform. This mode
accurately represents signals most of the time.
However, this mode does not acquire rapid variations in the signal
that may occur between samples. This can result in aliasing
(described on page 3- - 9) and may cause narrow pulses to be missed.
In these cases, you should use the Peak Detect mode to acquire data.
Peak Detect. In this acquisition mode, the oscilloscope finds the
highest and lowest values of the input signal over each sample
interval and uses these values to display the waveform. In this way,
the oscilloscope can acquire and display narrow pulses, which may
have otherwise been missed in Sample mode. Noise will appear to be
higher in this mode.
Average. In this acquisition mode, the oscilloscope acquires several
waveforms, averages them, and displays the resulting waveform. You
can use this mode to reduce random noise.

Time Base

The oscilloscope digitizes waveforms by acquiring the value of an
input signal at discrete points. The time base allows you to control
how often the values are digitized.
To adjust the time base to a horizontal scale that suits your purpose,
use the SEC/DIV knob.
TPS2000 Series Digital Oscilloscope User Manual
Understanding Oscilloscope Functions
3- 7