Bedienungsanleitung / Operation manual 30 MHz Digital ...

9. Alternate trigger (Trigger Mode: Pulse)
Alternate trigger (Trigger Type: Pulse) Menu is shown as Fig. 36.
Fig. 36 Alternate trigger (Trigger Type: Pulse) Menu
Alternate trigger (Trigger Type: Pulse) menu list:
MENU SETTING INSTRUCTION
Alternate
Mode
Pulse
Set vertical channel trigger type as pulse trigger.
Source
CH1
Select CH1 as the trigger source.
CH2
Select CH2 as the trigger source.
AC
DC
Not allow DC portion to pass.
Allow all portion pass.
Coupling
HF
Not allow high frequency of signal pass and only low
frequency portion pass.
LF
Not allow low frequency of signal pass and only high
frequency portion pass.
Polarity
Choose the polarity
when
Select pulse width condition and turn the M knob to set
time.
Mode
Holdoff
Auto
Holdoff
Reset
Acquire waveform even no trigger occurred
100ns~10s, adjust M knob to set time interval before
another trigger occur.
Set Holdoff time as 100ns
Term interpretation
1. Source:
Trigger can occur from several sources: Input channels (CH1, CH2), AC Line, Ext, Ext/5.
* Input: It is the most commonly used trigger source. The channel will work when selected as a
trigger source whatever displayed or not.
* Ext Trig: The instrument can trigger from a third source while acquiring data from CH1 and CH2. For
example, you might want to trigger from an external clock or with a signal from another part
of the test circuit. The Ext, Ext/ 5 trigger sources use the external trigger signal connected to
the EXT TRIG connector. Ext uses the signal directly; it has a trigger level range of +1.6 V to
-1.6 V. The EXT/ 5 trigger source attenuates the signal by 5X, which extends the trigger level
range to +8 V to -8 V. This allows the oscilloscope to trigger on a larger signal.
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