GDS-1000A-U Series User Manual 
96 
The Auto trigger status appears in the 
upper right corner of the display. 
 
The oscilloscope acquires the 
input signals once when a 
trigger event occurs, then 
stops acquiring. Pressing the 
Single key again will repeat 
the process. 
The Single trigger status appears in the 
upper right corner of the display. 
The oscilloscope acquires and updates 
the input signals only when a trigger 
event occurs. 
The Normal trigger status appears in the 
upper right corner of the display. 
The holdoff function defines the waiting period 
before the GDS-1000A-U starts triggering again 
after a trigger point. The Holdoff function ensures 
a stable display. 
Video standard 
(video trigger) 
National Television System Committee 
Phase Alternative by Line 
SEquential Couleur A Mémoire 
Sync polarity 
(video trigger) 
Video line 
(video trigger) 
 Selects the trigger point in the video signal.