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Horizontal Format
Press the Acquire button on the front panel; then press the XY soft key to set the
XY(On) or YT(Off) mode. The default setup is YT.
YT
Display channel Y input amplitude (typically voltage) vs. time. This is the normal
viewing mode for the oscilloscope. In the Normal time mode, signal events
occurring before the trigger are plotted to the left of the trigger point and signal
events after the trigger plotted to the right of the trigger point.
XY
XY mode changes the display from a volt- versus- time display to a volt- versus-
volt display. Channel 1 amplitude is plotted on the X- axis and Channel 2 amplitude
is plotted on the Y- axis, the two channels will be turned on or off together.
You can use XY mode to compare frequency and phase relationships between two
signals. XY mode can also be used with transducers to display strain versus
displacement, flow versus pressure, volts versus current, or voltage versus
frequency.
The phase deviation between two signals with the same frequency can be easily
measured via Lissajous method. The figure below shows the measurement
schematic diagram of the phase deviation.
According to sinθ=A/B or C/D (wherein, θ is the phase deviation angle between the
two channels and the definitions of A, B, C and D are as shown in the figure above),
the phase deviation angle is obtained, that is: θ=±arcsin (A/B) or ±arcsin (C/D)
If the principal axis of the ellipse is within quadrant I and III, the phase deviation
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