NI-9425 Clock Rate

[potatohead01]

I am currently attempting to change the clock rate on a NI-9425.  The module manual states that the rate should be 7us, but when I am testing it the rates seems to be locked down to 1kHz that is a far cry from the 140kHz that is defined on the speciifcation sheet.  Is there any method to change clock rate without using the FPGA module.

[BennyBenson]

What are you using as the clock? The 9425 should be capable of a sampling rate of 140kHz as you're saying, if it's using a clock set to said rate, and if it's not limited by any attached hardware. What hardware do you have attached to the module?

Andrew B.

[potatohead01]

I have checked the clock on the associated hardware and it is correct.  When I attempt to set the clock using the clock icon I get an error about the device not being capable of operating in a buffered mode.

[BennyBenson]

Could you send a screenshot of how you're attempting to implement this in your code.

Andrew B.

[potatohead01]

I have attempted both methods shown below.  The first gives me the buffer failure.  The second does not give an error but maintains the 1kHz sample rate.

[BennyBenson]

Have you tried explicitly wiring in a source to the sample clock timing function?

[potatohead01]

How would I go about performing that?

[BennyBenson]

As shown in this VI snippet. Create a control or constant from the source. Then select which clock source you're looking to reference.

[potatohead01]

Sorry it took so long to reply got called off onto something else.  Using sample clock gives the same you cannot use buffered device error.

[BennyBenson]

Could you attach your code, so I can try to replicate the issue on my end and debug from there.