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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).
Figure 7-7 Waveform Captured from Video Field Trigger
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