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Trigger question

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Trigger question

Postby bane » Thu Mar 17, 2011 8:53 am

Hi,

Is it possible to tell the scope to trigger immediately after the pretrigger buffer become full?

Thanks in advance.

Kind regards,
Bane
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Re: Trigger question

Postby Chris » Thu Mar 17, 2011 11:50 am

knowing the sampling rate, you could set the autotrigger timeout to a value that corresponds to the lenght of time taken to collect the required number of samples.
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Re: Trigger question

Postby bane » Thu Mar 17, 2011 12:09 pm

yes I know this.
I need to this dynamically. That means the default auto trigger timeout is infinite in my case.

In my scenario I have to generate an external trigger pulse when the pre-trigger buffer is still not full.
That means my requirement is that the scope "remembers" the trigger request, and immediately triggers after the number of samples have been collected...

Is this possible?
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Re: Trigger question

Postby Chris » Mon Mar 21, 2011 10:03 am

If the trigger even occurs before set number of pre-trigger samples has been reached, the trigger will not happen.

If the set number of pre-trigger samples has been reached, the trigger will happen the next time the trigger event occurs.

Even if a trigger event occurred before the set number of pre-trigger samples has been reached, the trigger will not happen until another trigger event occurs, after the number of pre-trigger samples has been reached.
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