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26
(2) Falling edge: Set to start timing when the falling edge of the input signal
passes the trigger level.
(3) Any edge: Set to start timing when any edges of the input signal pass the
trigger level.
Timeout Time:
Adjust the Multipurpose knob (shuttle knob or numeric keypad) to set the
timeout time.
Trigger Setting:
Please refer to the Trigger Setting in the “Edge Trigger” section for more
details.
5.10 Duration Trigger
With duration trigger selected, the oscilloscope identifies the trigger condition
by looking for the duration of the specified codes. The codes are the combination
of channel logic “AND”, and the value of each channel can be H (high), L (low),
or X (ignored). When the duration (△T) of the code meets a preset time,
trigger occurs. As shown below.
CH2
CH3
CH4
CH1
Picture 5-7 Duration trigger
Press TRIG MENU type, select duration by the Multipurpose knob. 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 duration, the trigger
source is CH1 and it is triggered at the rising edge, the trigger level is 0.00V.
Duration Trigger Menu
Source:
Press the source key to select the trigger source, you can select CH1, CH2,
CH3, and CH4. 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.
Code:
Press the code key to select H, L, X. The code setting of each channel is
displayed at the bottom of the screen, as shown in the figure: .
(1) H: Set the code value of the selected channel to “High”, that is, the
voltage level is higher than the trigger level of the channel.
(2) L: Set the code value of the selected channel to “Low”, that is, the voltage
level is lower than the trigger level of the channel.
(3) X: Set the code value of the selected channel to “Ignored”, that is, the
channel is not part of the codes. The oscilloscope will not trigger if all
channels in the codes are set to “ignored”.
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