Error -200019 occurred at DAQmx Read (Analog 1D Wfm NChan NSamp).vi:2

[Chien-Fang]

I want to use the program to obtain the signal from the 1kHz laser

but I can not do it, the error message is as below:

Error -200019 occurred at DAQmx Read (Analog 1D Wfm NChan NSamp).vi:2

Possible reason(s):

Measurements: ADC conversion attempted before the prior conversion was complete.

Increase the period between ADC conversions. If you are using an external clock, 
check your signal for the presence of noise or glitches.

Task Name: _unnamedTask<4>

my sampling rate is 30000 and number of each sampling is 10.

Thanks,

[Mcdan]

Chien-Feng,

What hardware are you using?  Which version of DAQmx are you using?

Dan

[Chien-Fang]

Sorry! i am not in the lab !

i will find out your question soon

thanks a lot !

[Chien-Fang]

Dan 

I am using the NI 6230 , but I don't know what  is the hardware 

Thanks!

[Mcdan]

Chien-Feng,

Since you're using the 6230, I don't see anything obviously wrong with your setup.  Do you see this error consistently, or does it happen sporadically (by this I mean does it happen at the same iteration of the top while loop)?  What is the nature of the signal that you're connecting to PFI 0?

Dan

[Chien-Fang]

PFI 0 is the trigger voltage about 5 V

[Mcdan]

How frequently do you recieve triggers?

[Chien-Fang]

About 1kHz
I am doing the laser experiment.

Because the frequency of laser now is 1kHz.

However, this Labview program was previously used to 82MHz laser.

So, is the sampling rate too high? or number of each sampling too much?

Thanks!