Tektronix TDS 500C User Manual

Measuring Waveforms

TDS 500C, TDS 600B, & TDS 700C User Manual

Consider the following rules when taking a snapshot:

 Be sure to display the waveform properly before taking a snapshot. Snapshot

does not warn you if a waveform is improperly scaled (clipped, low signal
amplitude, low resolution, etc.).

 To vary the source for taking a snapshot, simply select another channel,

math, or ref memory waveform and then execute snapshot again.

 Note that a snapshot is taken on a single waveform acquisition (or acquisi-

tion sequence). The measurements in the snapshot display are not continu-
ously updated.

 Be careful when taking automatic measurements on noisy signals. You might

measure the frequency of the noise and not the desired waveform.

 Note that pushing any button in the main menu (except for Snapshot) or any

front panel button that displays a new menu removes the snapshot from
display.

 Use High-Low Setup (page 3–120), Reference Levels (page 3–120), and

Gated Measurements (page 3–118) with Snapshot exactly as you would
when you display individual measurements from the Select Measrmnt
menu.

Measurement statistics displays information about each measurement (see
Figure 3–55 on page 3–117). As measurements are updated, the displayed value
can change. Measurement statistics displays either the mean and standard
deviation or the minimum and maximum values of measurements. The number
of measurements accumulated is also displayed.