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trigger requirements for 0.5hz signal

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nicky.r

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I am using a logic analyser to measure a low frequency signal of period 2s.I am able to observe the signal but,I am not able to trigger on a rising/falling edge.The trigger point appears to be random.For much higher frequency signals I am able to do edge trigger.I have set the threshold level to 1.5v.Are there any further specific settings to be done.
 

I don't know about logic analysers but with oscilloscopes you need to set the trigger mode to AUTO instead of NORMAL. The same may apply.

Keith
 

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