Reference
1. A solid wavefor
m indicates a channel (live) waveform display. The waveform
remains solid when the acquisition is stopped if no controls are changed that
make the display accuracy uncertain.
Changing the vertical and horizontal controls is allowed on stopped
acquisitions.
2. Reference waveforms appear w hite and waveforms with persistence applied
appear in the same color as the Main waveform, but with less intensity.
3. A broken line indicates the waveform display no longer matches the controls.
This happens when you stop the acquisition, and change a control setting that
the oscilloscope is not able to apply to the displayed waveform. For example,
changing the trigger controls on a stopped acquisition causes a broken-line
waveform.
Key Points
Persistence. The oscilloscope displays persistence waveform data with less
intensity than "live" waveform data. With Persistence set to Infinite, record points
accumulate until a control is changed.
Option Comments
Off Removes default or old waveforms whenever new waveforms
display
Time limit
Displays new waveforms at norma l intensity and old waveforms
at a lower intensity; erases old waveforms when they reach
the time limit
Infinite Older waveforms become less bright but always remain visible;
use Infinite persistence to look for infrequent events and to
measure long term peak-to-peak noise
XY Format.
Use the XY format to a nalyze phase differences, such as those
represented by Lissajous patterns. Th e format plots the voltage on channel 1
against the voltage on channel 2, where channel 1 is the horizontal axis and
channel 2 is the vertical axis. The oscilloscope uses the untriggered Sample
acquisition mode and displays data as dots. The s ampling rate is fixed at 1 MS/s.
NOTE. The oscilloscope can capture a waveform in normal YT mode at any
samplin
g rate. You can view the same waveform in XY mode. To do so, stop the
acquisition and change the display format to XY.
In XY f
ormat, the controls operate as follows:
The channel 1 Vertical Scale and Vertical Position controls set the horizontal
scale and position.
The channel 2 Vertical Scale and Vertical Position controls continue to set
vertical scale and position.
82 TBS1000B and TBS1000B-EDU Series Oscilloscopes User Manual
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