GW Instek GOS-6100 Series - Manual (Page 26)

GOS-6112 OSCILLOSCOPE
USER MANUAL
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Figure 5-11(a)
Figure 5-11(b)
Triggering of Video signal
In the work concerned with TV, complex signals and containing video
signal, blanking pedestal signal, and synchronizing signal are often
measured.
Press the TRIG MODE pushbutton to set the TV position. The built-in
active TV-Sync-separator provides the separation of frame or line sync
pulses from the video signal. To trigger the oscilloscope at the vertical
(frame) rate, press the TV-V/TV-H pushbutton to set TV-V coupling. To
trigger the oscilloscope at the horizontal (line), press the TV-V/TV-H
pushbutton to set TV-H coupling. The figure 5-12(a) shows vertical
signal of TV-V and Figure 5-12(b) shows horizontal signal of TV-H.
GOS-6112 OSCILLOSCOPE
USER MANUAL
 46 
Figure 5-12(a) TV-V Figure 5-12(b) TV-H
The polarity of the synchronization pulse is critical for the slope selection.
The figure 5-13(a) and 5-13(b) shows the examples of TV polarity
synchronization signals.
Figure 5-13(a) (–) Sync signal. Figure 5-13(b) (+) Sync signal