BK Precision 2194, User Manual

Page: 48 / 139

Trigger 48
6.7.4 Video Trigger
Video triggering can be used to capture the complicated waveforms of most standard analog video signals. The trigger
circuitry detects the vertical and horizontal interval of the waveform and produces triggers based on the video trigger
settings you have selected.
The oscilloscope supports standard video signal field or line of NTSC (National Television Standards Committee), PAL
(Phase Alternating Line) HDTV (High Definition Television) and custom video signal trigger.
To setup Video Triggering :
1. Press the Setup key to enter the Trigger Menu .
2. Press the Type softkey to view the available trigger types.
3. Turn the Universal Knob
4. Select Pulse and push the Universal Knob to select the trigger source.
Note:
The trigger level is automatically set to sync pulse. Turning the Trigger Level Knob does not change the trigger level.
5. Press the Standard softkey to select the desired video standard. ( 6.1 .)
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 1080iP/50 Progressive Tri-level
HDTV 1080i/50 Progressive Tri-level
Custom
Table 6.1 Video Standards
The parameters of Custom Video Trigger are shown in table 6.2 .
Frame Rate 25 Hz, 30 Hz, 50 Hz, 60 Hz
Of Lines 300 to 2000
PAL 1, 2, 3, 4
HDTV 720P/50 1:1, 2:1, 4:1, 8:1
Trigger Position Line Field
(line value)/1 1
(line value)/2 2
(line value)/3 3
(line value)/4 4
(line value)/5 5
(line value)/6 6
(line value)/7 7
(line value)/8 8
Table 6.2 Custom Video Trigger Parameters