User Manual

RIGOL 5 To Trigger the Oscilloscope
DS4000 User’s Guide
5-16
Video Trigger
Trigger on the standard video signal field or line of NTSC (National Television
Standards Committee), PAL (Phase Alternating Line), SECAM (sequential color with
memory) or HDTV (High Definition Television).
Trigger Type:
Press Type to select “Video”. At this point, the trigger setting information as shown
in the figure below is displayed at the upper right corner of the screen.
Source Selection:
Press Source to select CH1 to CH4 as the 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.
 : normal polarity. Trigger on the negative edge of the sync pulse.
 : inverted polarity. Trigger on the positive edge of the sync pulse.
Note: normal polarity is applicable to video signal with negative horizontal sync
pulse; inverted polarity is applicable to video signal with positive horizontal sync
pulse.
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 that 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 first ramp waveform pulse in the odd
field.
 Even field: trigger on the rising edge of the first ramp waveform pulse in the
even field.