Pulse Width Trigger; Video Trigger - UNI-T UPO3000E Series User Manual

5.3 Pulse Width Trigger

The pulse width trigger determines the trigger time according to the pulse
width, you can capture the pulse by setting the pulse width condition.
Press TRIG MENU type, select the pulse width by the Multipurpose knob.
You can also switch the trigger type by pressing the type key, then press the
Multipurpose knob to confirm.
At this time, the trigger setting information
the upper right corner of the screen, the trigger type is pulse width, the trigger
source is CH1, and the trigger level is 0.00V.
Pulse Width Trigger Menu
Source:
Press the Source button to select the trigger source, you can select CH1,
CH2, CH3, CH4, AC Line, EXT, and EXT/5. The currently selected source
is displayed at the upper right corner of the screen.
Note: Only selecting the channel with connected signals as a trigger source
can obtain a steady trigger.
Condition:
Press the condition key to select " > ", " < ", " = ".
(1) > : Triggers when the pulse width of the trigger signal is greater than the
pulse width setting time.
(2) < : Triggers when the pulse width of the trigger signal is less than the pulse
width setting time.
(3) = : Triggers when the pulse width of the trigger signal is equal to the pulse
width setting time.
Pulse Width Setting:
Adjust the Multipurpose knob (shuttle knob or numeric keypad) to set the
pulse widthtime.
Pulse Width Polarity:
Press the pulse width polarity key to select the positive pulse width and
negative pulse width.
In the oscilloscope, the time difference between the two points where the
trigger level intersects with the positive pulse is defined as the positive pulse
width; the time difference between the two points where the trigger level
is displayed at
intersects with the negative pulse is defined as the negative pulse width, as
shown in the figure below.
Positive
pulse width
Trigger Setting:
Please refer to the "Trigger Setting" in the edge trigger section.

5.4 Video Trigger

The video signal may contain the image information and the time sequence
information, and it has a variety of standards and formats. The UPO3000E
can be triggered on the field or line of the NTSC (National Television Standards
Committee), PAL (Phase Alternating Line), SECAM (Sequential Couleur A
Memoire) standard video signals.
Press TRIG MENU
You can also switch the trigger type by consecutively pressing the type key ,
then press the Multipurpose knob to confirm.
At this time, the trigger setting information is displayed at
the upper right corner of the screen, the trigger type is video, and the trigger
source is CH1.
Negative
pulse width
Trigger
level
type, and select video by the Multipurpose knob.
Trigger
level
20