To Trigger On Odd Or Even Fields - Agilent Technologies InfiniiVision 3000 User Manual

10
Triggers
Figure 30

To trigger on odd or even fields

To check the envelope of your video signals, or to measure worst case
distortion, trigger on the odd or even fields. When Field 1 is selected, the
oscilloscope triggers on color fields 1 or 3. When Field 2 is selected, the
oscilloscope triggers on color fields 2 or 4.
1 Press the [Trigger] key.
2 In the Trigger Menu, press the Trigger softkey; then, turn the Entry knob
3 Press the Settings softkey, then press the Standard softkey to select the
4 Press the Mode softkey and select Field1 or Field2.
The trigger circuits look for the position of the start of Vertical Sync to
determine the field. But this definition of field does not take into
consideration the phase of the reference subcarrier. When Field 1 is
selected, the trigger system will find any field where the vertical sync
170
Triggering on All Fields
to select Video.
appropriate TV standard.
Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide