3 - 24 USING THE COMBISCOPE INSTRUMENTS
The video trigger mode can be programmed to field1, field2, or lines using the
TRIGger:VIDeo:FIELd... commands. The video trigger line can be programmed
using the TRIGger:VIDeo:LINE command.
The video system can be selected using the TRIGger:VIDeo:FORMat:...
commands. The following standard video systems are supported:
- NTSC : 525 lines per frame
- PAL : 625 lines per frame
- SECAM : 625 lines per frame
- HDTV : 1050/1125/1250 lines per frame
1) Select video triggering and video standard.
Examples: TRIGger:TYPE VIDeo
Selects
TV video
triggering.
TRIGger:VIDeo:FORMat:TYPE SECAM
Selects the
SECAM
standard with 625 lines per frame.
TRIGger:VIDeo:FORMat:LPFRame 1125
Selects the
HDTV
standard with
1125
lines per frame.
2) Select video "lines" triggering and program the line to trigger on.
Examples: TRIGger:VIDeo:FIELd:SELect ALL
Selects the video
lines
trigger mode.
TRIGger:VIDeo:LINE 512
Selects video line number
512
.
3) Select video "field1/2" triggering and program the line to trigger on.
Examples: TRIGger:VIDeo:FIELd:SELect NUMBer
Selects video
field
triggering.
TRIGger:VIDeo:FIELd:NUMBer 2
Selects the video
field2
trigger mode.
TRIGger:VIDeo:FORMat:TYPE PAL
Selects the
PAL
standard with 625 lines per frame.
TRIGger:VIDeo:LINE 123
Selects video line number
123
. As a result the video mode is
automatically switched to
field1
(field1 = lines 1 .. 312).
TRIGger:VIDeo:LINE 325
Selects video line number
325
. As a result the video mode is
automatically switched to
field2
(field2 = lines 313 .. 625).
TRIGger:VIDeo:FIELd:NUMBer 1
Selects the video
field1
trigger mode. As a result the video
line number is automatically switched to
13
(= 325 - 625/2).
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