User’s Manual of
OWON
Color Mixed Signal Digital Storage Oscilloscope
The signal must be
centered and kept in the
horizontal direction.
Fig. 95
Lissajous Graph
Based on the expression
sin =A/B or C/D
, where, q is the phase difference angle, and
the definitions of A, B, C, and D are shown as the graph above. As a result, the phase
difference angle can be obtained, namely,
q =± arcsin (A/B )
or
± arcsin (C/D)
. If the
principal axis of the ellipse is in the I and III quadrants, the determined phase
difference angel should be in the I and IV quadrants, that is, in the range of (0-
π
/2)
or (3
π
/ 2- 2
π
). If the principal axis of the ellipse is in the II and IV quadrants, the
determined phase difference angle is in the II and III quadrants, that is, within the
range of (
π
/ 2 -
π
) or (
π
- 3
π
/2).
Example 6: Video Signal Trigger
Observe the video circuit of a television, apply the video trigger and obtain the stable
video output signal display.
Video Field Trigger
For the trigger in the video field, carry out operations according to the following
steps:
1.
Press the
TRIG MENU
button to display the trigger menu.
2.
Press the
F1
menu selection button and choose
Single
for Type.
3.
Press the
F2
menu selection button and choose
CH1
for Source.
4.
Press the
F3
menu selection button and choose
Video
for type.
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