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Chapter 5 To Trigger the Oscilloscope RIGOL
MSO2000A/DS2000A User’s Guide 5-23
Video Trigger (HDTV Option)
The waveform of video signal includes image signal and timing signal and different
signals adopt different standards and formats. MSO2000A/DS2000A provides basic
measurement function for video signals. The oscilloscope triggers 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 signal source list 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 all the horizontal sync pulses.
Line Num: for NTSC and PAL/ SECAM video standards, trigger on the specified
line in the odd or even field; for HDTV video standard, trigger on the specified
line.
Note: When this sync trigger mode is selected, you can modify the line number
using in the Line Num 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), 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 f irst ramp waveform pulse in the odd
field.
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