Small signal can only be triggerred in NIscope

[alex.]

I am using DAQ 5133.

Sometime, I need to collect some noise signal. So I just set trigger condition as Edge, rising, Norm, DC, ch0 and level '0' in my program, it can be triggerred.

But I found this only can be done when the vertical range has been set as the smallest value, such as 0.04V.

If I set the vertical range to 5V, it cannot be triggerred and will give error.

Any suggestion, thanks.

[Meadow]

Hello Turbot,

What kind of error that you got?

How small is the voltage level that you were trying to trigger the scope acquisition?

Regards,

James

[alex.]

Only when both channel range set to less than 0.01V, it can be triggered by 0.005 with rising edge.

[Boon Chen]

Hi Turbot,

There should not be a limitation on the input range for you to set a trigger level of 0. I have a couple of questions regarding your attached VI, do you need to acquire on 2 channels or only 1 channel? Does your problem occur on both channels? What's the error code that you get, is it timeout?

Regards,

Boon Chen