RIGOL 
© 2008 RIGOL Technologies, Inc. 
  User’s Guide for DS1000B series 
 
Key points: 
Sync Pulses: When Normal Polarity is selected, the trigger always occurs on 
negative-going sync pulses. If the video signal has positive-going 
sync pulses, use the inverted Polarity. 
 
 
Figure 2-46 
Video Trigger: Line Synchronization 
 
 
Figure 2-47 
Video Trigger: Field Synchronization