5. Advanced User Guidebook
Fig. 5-18 Video trigger menu
Video menu list:
MENU SETTING INSTRUCTION
Single Mode Video Set vertical channel trigger type as video trigger.
Source
CH1
CH2
EXT
EXT/5
Select CH1 as the trigger source.
Select CH2 as the trigger source.
The external trigger input.
Ext-trigger divided to 5 to extend trigger level range.
Modu
NTSC
PAL
SECAM
Select video modulation
Sync
Line
Field
Odd
Even
Line NO.
Synchronic trigger in video line.
Synchronic trigger in video field.
Synchronic trigger in video odd filed
Synchronic trigger in video even field
Synchronic trigger in designed video line, turn the M
knob to set the line number
Mode
Holdoff
Auto
Holdoff
Reset
Acquire waveform even no trigger occurred
100ns~10s, adjust the M knob to set time interval
before another trigger occur.
Set Holdoff time as 100ns
3. Pulse Width Trigger
Pulse trigger occurs according to the width of pulse. The abnormal signals can be
detected through setting up the pulse width condition.
The Pulse Width Trigger Menu is shown as Fig. 5-19.
Fig. 5-19 Pulse Width Trigger menu
Pulse Width Trigger menu list
MENU SETTING INSTRUCTION
Single Mode Pulse
Set vertical channel trigger type as pulse trigger.
Source
CH1
CH2
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Coupling
AC
DC
HF
LF
Not allow DC portion to pass.
Allow all portion pass.
Not allow high frequency of signal pass and only low
frequency portion pass.
Not allow low frequency of signal pass and only high
frequency portion pass
User Manual of Smart Digital Storage Oscilloscope
36
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