User Manual

55
Video Trigger
Video triggering is used to get stable displays of analog video signals and allows you to view any
portion of a video frame. For NTSC (National Television Standards Committee), PAL (Phase
Alternating Line), 1080i (50 Hz or 60 Hz), or custom video signals, you can trigger on a selected
line or field. For the HDTV (High Definition Television) 720p and 1080p signals (either 50 or 60
Hz), you can trigger on a selected line.
To set the Video Trigger:
1. Press the Setup button on the front panel to enter the TRIGGER menu.
2. Press the Type softkey. Turn the Universal Knob to select Video and push the knob to confirm.
3. Press the Source softkey. Turn the Universal Knob to select an analog channel as the trigger
source.
4. Note the Trigger Level knob does not change the trigger level because the trigger level is
automatically set to the sync pulse.
5. Press the Standard softkey to select the desired video standard. The oscilloscope supports
the following video standards:
Standard
Type
Sync Pulse
NTSC
Interlaced
Bi-level
PAL
Interlaced
Bi-level
HDTV 720P/50
Progressive
Tri-level
HDTV 720P/60
Progressive
Tri-level
HDTV 1080P/50
Progressive
Tri-level
HDTV 1080P/60
Progressive
Tri-level
HDTV 1080i/50
Interlaced
Tri-level
HDTV 1080i/60
Interlaced
Tri-level
Custom
The following table shows the parameters of the Custom video trigger:
Softkey
Frame rate 25 Hz, 30 Hz,
50 Hz, 60 Hz
Of Lines
300 - 2000
Of Fields
1, 2, 4, or 8
Interlace
1:1, 2:1, 4:1, 8:1
Trigger Position
Line
Field
(line value)/1
1
(line value)/2
2