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Triggering the Oscilloscope
To use TV triggering
3 Press the sync polarity softkey to set the TV trigger to either positive
( ) or negative ( ) sync polarity.
4Press the
Standard softkey to set the TV standard.
The oscilloscope supports triggering on NTSC, PAL, PAL-M, SECAM, and
Generic television (TV) and video standards. NTSC, PAL, PAL-M, and SECAM
are broadcast standards used throughout the world. Generic allows you to
trigger on progressive scan and other non-broadcast video signals.
5Press the Mode softkey to select the TV triggering mode
The TV trigger modes available are:
Field1 and Field2 - trigger on the rising edge of the first serration pulse of field
1 or field 2.
All Fields - trigger on the rising edge of the first serration pulse of both field 1
and field 2 (not available in Generic mode).
All Lines - trigger on the first line found.
Line: Field1 and Line:Field2 - trigger on the selected line # in field 1 or field 2.
Line: Alternate - alternately trigger on the selected line # in field 1 and field 2
(not available in Generic mode).
Vertical - trigger on the rising edge of the first serration pulse or ~70 us after
the start of vertical sync, whichever occurs first (only available in Generic
mode).
Count: Vertical - counts falling edges of sync pulses; triggers on the selected
count # (only available in Generic mode).
Provide Correct Matching
Many TV signals are produced from 75 Ω sources. To provide correct matching to
these sources, a 75 Ω terminator (such as an Agilent 11094B) should be connected
to the oscilloscope input.
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