UNI-T UPO2000E Series, Руководство пользователя

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13 Code Pattern Trigger
The code pattern trigger identifies the trigger condition by looking for the specified code patterns. The code type is the
combination of the channel logic "AND", each channel can be set to H (high), L (low), X (ignored). You can also specify
a path in the code type as a rising edge or falling edge (only one edge can be specified). If the code patterns of the other
channels are "true" (i.e., the actual code is consistent with the default code type), the oscilloscope will trigger on the
specified edge. If the edge is not specified, the oscilloscope will trigger at the last edge of the code type "true". If the code
patterns of all channels are set to "ignore", the oscilloscope will not trigger.
Press TRIG MENU type , and select code pattern 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 code pattern, the trigger source is CH1, and the trigger level is 0.00V.
N Edge Trigger Menu
Source:
Press the source button to select any of CH1, CH2, CH3, or 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 stable trigger.
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Code Pattern:
Press the code key to select H, L, X, rising edge, or falling edge. The code pattern setting of each channel is displayed at
the bottom of the screen, as shown:
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1) H: Set the code pattern 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 pattern 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 pattern value of the selected channel to “Ignored”, that is, the channel is not part of the code pattern.
The oscilloscope will not trigger if all channels in the code pattern are set to “ignored”.
(4) Rising edge: Set the code pattern to the rising edge of the selected channel.
(5) Falling edge: Set the code pattern to the falling edge of the selected channel.
Trigger Setting:
Please refer to the Trigger Setting in the Edge Trigger section for more details.
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