7.Demonstration
71
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
TRIGGER Menu
button.
(2)
Select
Trig Mode
in the bottom menu; select
Video
in the left menu.
(3)
Select
Source
in the bottom menu; select
①
in the left menu.
(4)
Select
Modu
in the bottom menu; select
NTSC
in the right menu.
(5)
Select
Sync
in the bottom menu; select
Field
in the right menu.
(6)
Turn the
VOLTS/DIV
,
VERTICAL POSITION
and
SEC/DIV
knobs to obtain
a proper waveform display (see
).
Figure 7-7 Waveform Captured from Video Field Trigger
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