Maximum Digital output speed of DAQ 6009

[Karthi_R]

Hi all,

I am trying to generate a clock puse from the digital output of my USB DAQ 6009. The maximum frequency I was able to produce was 0.5kHz but I would like to generate atleast 1kHz. I hv wired the port0/line0 of the DIO of the DAQ to the ai0 of the DAQ and thus tried to read the output through an anlog input of the same device. I have attached both the programs here. Am not sure whether it is right. Please help out. Thanks in advance.

[crossrulz]

With a software timing DIO, you can't say you are running at a certain rate.  Software is not a reliable timing source.  You could use the analog output, but you are limited to 150Hz rate with your board.

In order to make a good clock, you need a Hardware Timed DIO.

[Karthi_R]

Thanks for the reply. Is the value you mentioned 150Hz a constant value for the device? The data sheet specifies that the sample rate is 48KS/s for USB 6009. Does that have anything to do with the rate at which I can transmit an analog output? What i exactly want to know is that will I be able to send the analog output at a rate equal to the specified sample rate?

[crossrulz · Accepted solution]

The 150S/s is the maximum rate of the Analog Output.  The 48kS/s is the maximum rate of the Analog Input.  Read the specs a little closer.

This unit is not going to do what you want.  I would recommend getting a hold of your local NI rep and discuss your requirements with them.  They should be able to set you up.

[Karthi_R]

Thanks for the clarification. I understood now.