110 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
11 Triggers
 
5 Press the sync polarity softkey to set the Video trigger to either positive ( ) or 
negative ( ) sync polarity.
6 Press the Settings softkey.
7 In the Video Trigger menu, press the Standard softkey to set the video standard.
The oscilloscope supports triggering on the following television (TV) and video 
standards.
Provide Correct Matching
Many video signals are produced from 75 Ω sources. To provide correct matching to these 
sources, a 75 Ω terminator (such as a Keysight 11094B) should be connected to the 
oscilloscope input.