Window Extension; Trigger Hold-Off Time Adjustment - UNI-T UTD2000 Series User Manual

3.3 Window extension

Extension window is used to enlarge the waveform so that users view the image
details. The setting of window extension shall not be slower than that of main time base.
Extensive time base
Main time base
Under Window extension time base, there are two display areas, as shown in the
figure above. The original waveform is displayed in the upper part, this area can be moved
left and right by turning horizontal POSITION knob or can be enlarged and reduced by
turning the horizontal SCALE knob.
The lower part is the waveform that has been extended horizontally from selected
original waveform area. What users should pay attention is that the extension time base
enhances the resolution compared with main time base (as shown in the figure above).
Because the displayed lower-part waveform corresponds to the selected upper-part area,
so the extension time base can be enhanced by rotating the horizontal SCALE, in other
words, it enhances the horizontal extension multiples of waveform.
3.4 XY Mode
XY Mode is also called Lissajous Figure Mode. By using the Lissajous method, users can
measure the phase difference of two signals with same frequency. As shown in the figure
below:
Waveform horizontal extension part
Waveform horizontal extension part
Figure 3-2 Screen Display under Window Extension
Figure 3-3 Lissajous-Figure
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