188 6000 Series Oscilloscope User’s Guide
4 Triggering the Oscilloscope
Table 12 Line (or count for Generic) numbers per field for each
non-HDTV/EDTV video standard
Table 13 Line numbers for each EDTV/HDTV video standard
Example exercises
The following are exercises to familiarize you with TV
triggering. These exercises use the NTSC video standard.
To trigger on a specific line of video
TV triggering requires greater than 1/2 division of sync
amplitude with any analog channel as the trigger source.
Turning the trigger Level knob in TV trigger does not change the
trigger level because the trigger level is automatically set to the
sync pulse tips.
Video standard Field 1 Field 2 Alt Field
NTSC 1 to 263 1 to 262 1 to 262
PAL 1 to 313 314 to 625 1 to 312
PAL-M 1 to 263 264 to 525 1 to 262
SECAM 1 to 313 314 to 625 1 to 312
Generic 1 to 1024 1 to 1024 1 to 1024 (vertical)
Line Number Represents Count
In Generic mode, the line number represents the number of a count instead of a
real line number. This is reflected in the label in the softkey changing from Line to
Count. In the Mode softkey selections, Line:Field 1, Line:Field 2 and
Count:Vertical are used to indicate where the counting starts. For an interlaced
video signal, the counting starts from the rising edge of the first vertical serration
pulse of Field 1 and/or Field 2. For a non-interlaced video signal, the counting
starts after the rising edge of the vertical sync pulse.
EDTV 480p/60 1 to 525
HDTV 720p/60 1 to 750
HDTV 1080p/24 1 to 1125
HDTV 1080p/25 1 to 1125
HDTV 1080i/50 1 to 1125
HDTV 1080i/60 1 to 1125
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