UTD2000 Series User Manual
26
Chapter IV Trigger System
Trigger level knob: trigger knob is used to adjust the trigger level (To set the voltage
level corresponding to trigger point).
Trigger Type
UTD2000 series DSO support: Edge, Pulse, Video and Alternative trigger;
Edge Trigger: edge trigger mode refers to triggering of trigger threshold on the input
signal edge.
Pulse Width trigger: trigger produces when the pulse width of the trigger signal satisfies
some set trigger >, < or = condition.
Video Trigger: conduct field or line trigger for standard video signal (Only for UTD2025CL)
These tree triggering can by active by pressing F1 button at the TRIG MENU .
Alternating trigger: applicable to trigger signals without frequency correlation.
All kinds of trigger menus shall be respectively described as follows.
User can active Alternative trigger by pressing F2 button at the TRIG MENU .
4.1 Edge trigger
Edge trigger mode refers to triggering of trigger threshold on the input signal edge.
When selecting “edge trigger”, trigger on the rising edge or falling edge of input signal
shall be completed.
Table 4-1 Edge trigger menu
Function Menu Setting Description
Type Edge
Source
CH1 Set CH1 as the triggering signal source
CH2 Set CH2 as the triggering signal source
EXT Set external trigger input channel as the triggering signal source
AC Line Set AC power line as trigger source
Alter Set to Alternative trigger between CH1 and CH2 as signal source
Slope
Rising Set trigger on the signal rising edge
Falling Set trigger on the signal falling edge
Rise/fall Set trigger on the signal both rising and falling edge
Mode
AUTO
Set to automatic trigger. The DSO will continuously perform data acquisition
without triggering signal.
Normal
Set to normal trigger. The DSO will only perform data acquisition when there is
triggering signal.
Single
Set to single trigger. The DSO will only perform 1 cycle of the data acquisition
when there is triggering signal.
Coupling AC Block the DC component of triggering signal
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