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Chapter 5 To Trigger the Oscilloscope RIGOL
DS1000Z User Guide 5-13
Video Trigger
The video signal can include image information and timing information and can
adopt different standards and formats. DS1000Z can trigger on the standard video
signal field or line of NTSC (National Television Standards Committee), PAL (Phase
Alternating Line) or SECAM (Sequential Couleur A Memoire).
Trigger Type:
Press Type, rotate to select "Video" and press down . At this point, the
trigger setting information is displayed at the upper right corner of the screen.
For example,
. The trigger type is video trigger; the trigger
source is CH1; the trigger level is 0.00 V.
Source Selection:
Press Source to switch the signal source and select CH1-CH4. For the details, please
refer to the introduction in "
Trigger Source". The current trigger source is
displayed at the upper right corner of the screen.
Note: Select channel with signal input as trigger source to obtain stable trigger.
Video Polarity:
Press Polarity to select the desired video polarity. The polarities available are
positive polarity (
) and negative polarity ( ).
Sync:
Press Sync to select the desired sync type.
All Line: trigger on the first line found.
Line: for NTSC and PAL/SECAM video standards, trigger on the specified line in
the odd or even field.
Note: When this sync trigger mode is selected, you can modify the line number
using in Line menu with a step of 1.
The range of the line number is from 1 to 525 (NTSC), 1 to 625 (PAL/SECAM), 1
to 525 (480P) or 1 to 625 (576P).
Odd: trigger on the rising edge of the first ramp pulse in the odd field.
Even: trigger on the rising edge of the first ramp pulse in the even field.
Video Standard:
Press Standard to select the desired video standard.
NTSC: the field frequency is 60 fields per second and the frame frequency is 30
frames per second. The TV scan line is 525 with the even field goes first and the
odd field follows behind.
PAL/SECAM:
--PAL: the frame frequency is 25 frames per second. The TV scan line is 625 with
the odd field goes first and the even field follows behind.
--SECAM: the frame frequency is 25 frames per second. The TV scan line is 625
with interlaced scan.
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