Display
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TDS3000B Serie s User Manual
XY Waveform Restrictions. The math waveform, zoom, and autoset
functions do not work in the XY display format. All reference
waveforms displayed in XY format must have the same record
length (500 or 10,000 point s).
Gated XYZ. Displays XY signals only when the Z (gating) channel is
true. Gated XYZ is similar to analog oscilloscope modulat ed XYZ
mode except that the displa yed XY signal is either on or off; there is
no intensity modulation. Gated XYZ is useful for showing
constellation diagrams.
Push the Gated By screen button to select the Z (gate) source
channel.
The general purpose knob sets the Z-channel threshold level.
Z-channel signals above the set threshold are true and open t he XY
signal gate; Z-channel signal s below t he set threshold are false and
close the XY signal gate. The gating channel is always a high-true
logic; to emulate a low-true gating logic, use the vertical menu to
invert the Z-channel signa l.
XY and XYZ Cursors. Refer to page 3--21 for inform ation on XY and
XYZ cursor readouts.
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