ZDS2022 Oscilloscope 100 Practical Videos 47: Pattern Trigger

For input signals of different channels, sometimes we hope that one channel signal satisfies one condition while another channel waveform satisfies another condition, that is, to realize the logical "AND" combination of channels, such as realizing high-level trigger of channel 1 waveform and rising edge trigger of channel 2 at the same time. How to do it?

The ZDS2022 oscilloscope not only has 21 free and open protocol triggers, but also 11 basic trigger types that are very practical! The pattern trigger can achieve the above requirements.

Press the [Trigger] key to set the trigger mode to normal mode, set the trigger type to pattern trigger, and provide 5 patterns for each channel, namely: high level, low level, ignore, rising edge and falling edge. Set the pattern of channel 1 to high level and the pattern of channel 2 to rising edge, and the waveform on the screen will be accurately triggered. At this time, it can be seen that the waveform of channel 1 is high level at the trigger point, and the waveform of channel 2 is rising edge. If you observe carefully, you will find that the waveform of channel 1 is constantly moving because they are both high levels that meet the trigger conditions. It should be noted that only one channel can be selected as the edge pattern. For example, when the pattern of channel 1 is selected as the rising edge, if the pattern of channel 2 is selected as the falling edge, the pattern of channel 1 will be forced to ignore. When the pattern of a channel is "ignore", the channel does not participate in the pattern trigger.

We can also set the code pattern of channel 1 to rising edge and the code pattern of channel 2 to low level. The code pattern trigger of ZDS2022 oscilloscope can help you achieve it!

Figure 1 Channel 1 high level, channel 2 rising edge trigger

Figure 2 Channel 1 rising edge, channel 2 low level trigger