Measuring Waveforms
3–96
TDS 684A, TDS 744A, & TDS 784A User Manual
Snapshot Display
Figure 3–57: Snapshot Menu and Readout
Consider the following rules when taking a snapshot:
H 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.).
H To vary the source for taking a snapshot, simply select another channel,
math, or ref memory waveform and then execute snapshot again.
H 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.
H Be careful when taking automatic measurements on noisy signals. You might
measure the frequency of the noise and not the desired waveform.
H 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.
H Use High-Low Setup (page 3–92), Reference Levels (page 3–93), and
Gated Measurements (page 3–91) with Snapshot exactly as you would
when you display individual measurements from the Select Measrmnt
menu.
