186 6000 Series Oscilloscope User’s Guide
4 Triggering the Oscilloscope
The selected trigger source is displayed in the upper-right
corner of the display. Turning the Trigger Level knob does not
change the trigger level because the trigger level is
automatically set to the sync pulse. Trigger coupling is
automatically set to TV in the Trigger Mode/Coupling menu.
3 Press the sync polarity softkey to set the TV trigger to either
positive ( ) or negative ( ) sync polarity.
4 Press the Standard softkey to set the TV standard.
The oscilloscope supports triggering on the following
television (TV) and video standards.
5 Press the Mode softkey to select the portion of the video
signal that you would like to trigger on.
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 (interlaced standards
only).
• All Fields — Trigger on the rising edge of the first pulse in
the vertical sync interval (not available in Generic mode).
• All Lines — Trigger on all horizontal sync pulses.
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.
Standard Type Sync Pulse
NTSC Interlaced Bi-level
PAL Interlaced Bi-level
PAL-M Interlaced Bi-level
SECAM Interlaced Bi-level
Generic Interlaced/Progressive Bi-level/Tri-level
EDTV 480p/60 Progressive Bi-level
HDTV 720p/60 Progressive Tri-level
HDTV 1080p/24 Progressive Tri-level
HDTV 1080p/25 Progressive Tri-level
HDTV 1080i/50 Interlaced Tri-level
HDTV 1080i/60 Interlaced Tri-level
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