Tektronix TBS2072, Руководство пользователя

Страница: 69 / 142

Analyzing a waveform
Automatic measurements tip
A symbol appears next to a measurement if a vertical signal clipping condition exists. Part of the waveform is above
or below the upper or lower edge of the screen. Signal clipping causes inaccurate measurements. To obtain an accurate
measurement, turn the
Vertical Scale and Position knobs so that all of the waveform is on the screen.
Taking a measurements snapshot
The Snapshot measurement (in the Measurement menu) displays all single-channel measurements on one screen
for a single acquisition of one channel. You can view the snapshot results and save a screen image of the snapshot
measurements to a
fi le.
To take a measurements snapshot:
1. Acquire and display a triggered waveform.
2. Push Measure .
3. Push the side-menu button of the channel for which to show the measurement snapshot. You can only take a snapshot
of one channel at a time.
4. Use the Multipurpose knob to select and click Snapshot . the snapshot screen opens immediately.
5. If the File Save button is set to save an
image, push the File Save button to save
the snapshot image to a fi le. (See page 70,
Saving fi les to USB with the Save File
button .)
6. Push the Menu On/Off button to close
the Snapshot screen and return to the
measurements menu.
Snapshot measurement tip
The measurement snapshot does not mark a measurement if a vertical clipping condition exists. Clipping is where part of
the waveform is above or below the display. To obtain a proper measurement snapshot, use the Vertical Scale and
Position knobs to make all of the waveform appear in the display.
You can also use Gating to analyze only a speci fi ed part of a waveform when you take a measurement snapshot. (See
page 55, Taking a measurement on just a part of the waveform (Gating) .)
TBS2000 Series User Manual 51