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Behavior
When AutoBright is On, the intensity of the waveform changes automatically to provide a visible
waveform. When AutoBright is Off, the display simulates the appearance of analog oscilloscope
signals. Waveforms that trigger more frequently appear brighter than waveforms that trigger less
frequently.
Display Format
To Use
Click one of the buttons to select the display format.
Behavior
YT is the conventional oscilloscope display format that shows a signal
amplitude on the vertical axis as it varies over time on the horizontal
axis.
When you set the vertical position to center the display in YT mode, the
XY display is at center screen, and each division of display in YT mode
produces a division of display in XY mode.
XY plots the amplitude of one waveform against the amplitude of another waveform on a point-
by-point basis. This format is useful for showing the relationship between two signals, such as
current and voltage waveforms that combine to form an I-V characteristic. When you select the
XY format, waveforms appear according to their channel pairings. XY format is a dot-only
display, although it can have persistence. The Vector style selection has no effect when you select
XY format.
XYZ plots the amplitude of one waveform record against the amplitude of another waveform
record on a point-by-point basis. XYZ requires Fast Acquisitions mode. A third waveform record
modulates the waveform intensity. When you select the XYZ format, waveforms appear according
to their channel assignments. The XYZ format is not triggered. A –5 division signal (including
position and offset) on CH 3 produces a blank screen; a +5 division signal produces full intensity.
Selecting YT or XY only affects the display. The HORIZONTAL and VERTICAL SCALE and
POSITION knobs and menus control the same parameters regardless of the display format. In XY
Display format, the horizontal scale continues to control the time base and the horizontal position
continues to control the portion of the waveform that is shown. If in XY or XYZ, histograms are
allowed, and horizontal controls are ignored.
Use the Display menu Display Format submenu to directly access the format types.
Notes
The Vectors and Intensified Samples selections are not available in the XY and XYZ Display
Formats.
The XYZ format is only available on 4-channel models and only supported in FastAcq mode.