RIGOL
Settings for Video Trigger
Choose video triggering to trigger on fields or lines of NTSC, PAL, or SECAM
standard video signals. Trigger coupling preset AC.
Table 2-12:
Menu
Settings
Comments
Source
CH1
CH2
EXT
EXT/5
EXT
（
50
Ω
）
Selects CH1 as the trigger signal
Select CH2 as the trigger signal
Select EXT TRIG as the trigger signal
Select EXT TRIG/5 as the trigger signal
Select EXT TRIG(50
Ω
) as the trigger signal
Polarity
Normal polarity
Inverted polarity
Triggers on the negative edge of the sync pulse
Triggers on the positive edge of the sync pulse
All Lines
Line Num
Trigger on all lines
Trigger on an appointed line
Sync
Odd field
Even field
Select to trigger on odd field or even field
Standard PAL/SECAM/NTSC
Setup synchronization and line number count to
certain video system
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 selection.
Source-EXT
(50
Ω
)
:
This function is only in models that the bandwidth is higher than
100MHz. And normally used ONLY for a signal source that requires
50
Ω
termination.
Copyright 2004 Rigol Electronic
2-27
User Manual for DS5000 Series