User manual

Reference
2. Reference wave
forms appear white 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 wave
form 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 normal 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 analyze phase differences, such as those
represented by Lissajous patterns. The format plots the v oltage 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 us
es the untriggered Sample
acquisition mode and displays data as dots. The sampling rate is fixed at 1 MS/s.
NOTE. The oscilloscope can capture a waveform in normal YT mode at any
sampling rate. You can view the same waveform in XY mode. To do s o, stop the
acquisition and change the display format to XY.
In XY format, the controls operate as follows:
The channel 1 Vertical Sc ale 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.
The following functions do not work in XY display format:
Autoset (resets display format to YT)
Autorange
Automatic measurements
84 TBS1000 Series Oscilloscopes User Manual