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RIGOL Chapter 5 To Trigger the Oscilloscope
5-24 MSO2000A/DS2000A User’s Guide
Video Trigger (HDTV Option)
The video signal can include image information and timing information and can
adopt various standards and formats. MSO2000A/ DS2000A can trigger on the
standard video signal field or line of NTSC (National Television Standards Committee),
PAL (Phase Alternating Line), SECAM (Sequential Couleur A Memoire) or HDTV (High
Definition Television).
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 76.0 mV.
Source Selection:
Press Source to switch the trigger source between CH1 and CH2. 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 Lines: trigger on the first line found.
Line Num: trigger on the specified line.
When this sync trigger mode is selected, you can modify the line number. Press
Line Num and turn or the inner knob of the navigation knob to adjust the
line number at a relatively smaller step or turn the outer knob of the navigation
knob to adjust the line number at a relatively larger step.
The range of the line number is from 1 to 525 (NTSC), 1 to 625 (PAL/ SECAM), 1
to 525 (480P), 1 to 625 (576P), 1 to 750 (720P), 1 to 1125 (1080P) or 1 to 1125
(1080I ).
Odd Field: trigger on the rising edge of the first ramp pulse in the odd field.
Even Field: trigger on the rising edge of the first ramp pulse in the even field.
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