Triggers 11
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 201
oscilloscope will trigger on color field 1 alternating with color field 3 (see the
following figure). This setup can be used to measure the envelope of the reference
burst.
If a more detailed analysis is required, then only one color field should be selected
to be the trigger. You can do this by using the Field Holdoff softkey in the Video
Trigger Menu. Press the Field Holdoff softkey and use the Entry knob to adjust the
holdoff in half-field increments until the oscilloscope triggers on only one phase of
the color burst.
A quick way to synchronize to the other phase is to briefly disconnect the signal
and then reconnect it. Repeat until the correct phase is displayed.
When holdoff is adjusted using the Field Holdoff softkey and the Entry knob, the
corresponding holdoff time will be displayed in the Trigger Mode and Coupling
Menu.
Figure 32 Triggering on Color Field 1 Alternating with Color Field 3
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