Tektronix TDS5054, User Manual

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Acquiring Waveforms
TDS5000 Series User Manual
3- 41
The oscilloscope displays waveforms in one of three formats: YT, XY, or XYZ.
Use the procedure that follows to set the display format.
Overview To set display format Control elements and resources
Select the
format
1. Click the DISP toolbar button. The Display Setup control
window opens on the Appearance tab.
2. Select between the YT, XY, and XYZ display formats:
H
YT is the conventional oscilloscope display format.
It shows a signal voltage (the vertical axis) as it
varies over time (the horizontal axis).
H
XY compares the voltage levels of two waveform
records point by point (see Figure 3--16). That is,
the oscilloscope displays a graph of the data of one
channel versus another. The data is a continuous
stream, and there are no waveform records. XY
requires Fast Acquisitions mode, and is particularly
useful for studying phase relationships. When you
set the vertical position offset 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.
In XY format, any channel displayed is assigned to
the axis indicated in Table 3--4 and displayed as
part of an XY pair. If only one source is displayed,
the oscilloscope automatically turns on the other to
complete the pair. Moreover, once XY is on,
selecting either source turns the pair on; turning off
either removes both sources from the display.
XY format is a dot-only display, although it can
have persistence. The Vector style selection has no
effect when you select XY format.
H
XYZ format compares the voltage levels of the
CH 1 (X) and CH 2 (Y) waveform records
point-by-point as in XY format. XYZ requires Fast
Acquisitions mode. The displayed waveform
intensity is modulated by the CH 3 (Z) waveform
record. 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.
If in XY or XYZ, histograms are allowed and horizontal
controls are ignored. The XYZ format is only available
on the TDS5054 and TDS5104 models.
Figure 3- 16: Fast Acquisitions XY display
Setting the Display Format