UNI-T UPO2102 User Manual page 32

User's Manual
The waveform before amplification is shown in the square brackets on the upper part of the screen. It can
move by horizontal Position or adjusting time base SCALE to increasing or decreasing this area.
Enlarged Waveform
The enlarged waveform is displayed on the bottom part of the screen, window extension improves resolution
relative to the main time base.
Time Base Selection
When window extension is selected, time base menu can set extended time base or main time base.
a. Extend Time Base: Rotate horizontal SCALE knob to change time base scale of extend time base.
b. Main Time Base: Rotate horizontal SCALE knob to change time base scale of main time base.
Note: Window extension requires that time base scale should at 20 ms/div～1 ns/div. Only in this range,
window extension can be functioned. If turn on extend time base in ROLL mode, the main time base sets to
20 ms by default.
6.4 XY
The waveform displayed in XY mode is also called Lissajous curve as shown in Figure 6-4. Meanwhile, XY
supports cursor measurement, it can quickly measuring the phase difference between two channels as
shown in Figure 6-5.
(1) Format of Time Base
a. YT: Display voltage value on time base (horizontal scale).
b. XY: Display Lissajous curve, it can easily measuring phase difference between two signals with
same frequency.
(2) Display
a. Full screen：Only display Lissajous curve on the screen.
b. Split screen：Display Lissajous curve on the bottom part of the screen, the upper part displays the
corresponding waveform of X-Y.
(3) X-Y
Set the waveform that has generated Lissajous curve, which can select CH1-CH2,、CH1-CH3, CH1-
CH4, CH2-CH3, CH2-CH4, CH3-CH4.
When X-Y menu select CH1-CH2, input CH1 signal on horizontal axis (X axis), input CH2 signal on vertical
axis(Y axis).
In XY mode, if CH1 or CH3 is activates, use POSITION knob on VERTICAL control area to move XY curve
on horizontal direction; if CH2 or CH4 is activated, use POSITION knob on VERTICAL control area to move
XY curve on vertical direction.
In order to get better display effect of Lissajous curve, to adjusting SCALE knob on VERTICAL control
area to change each channel's amplitude scale and adjusting SCALE knob on HORIZONTAL control area
to change time base scale. Waveform in XY mode as shown in Figure 6-4.
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