ni-9264 precise frequency

[eugenene]

Hello. I'm Eugenene. 

I am using ni-9264 and labview, and I would like to generate 16 analog voltage outputs with different frequencies.

I want to create waveforms with a 1Hz difference, such as 2000Hz, 2001Hz, 2002Hz, and so on.

Is this possible with ni-9264? I have measured the generated waveforms, but they do not precisely match the desired frequencies.

I am asking to find out if there is a way to reduce the frequency error.

Thank you.

Best regards, 

Eugenene

[Henrik_Volkers]

(Newer worked with CDaq.. I use PXI)

I would go the 'DDS' way and constantly feed new calculated values to the DAC channels.

I think there is an example for constantly feeding that DAC . 

(Had a similar task, one channel and multi sine exitation)

Make shure you use the actual samplerate 😉

If you use the standard waveform generator, it's possible (shure?) that frequencies gets coerced to values fitting a ringbuffer and reuse them.

And depending on how precise ... you need to sync the DAC clock with your Frequency-Meter (Counter) and the best clock you have...

Precise frequency generation mandates a precise clock/timing (with low phasenoise)