DAQ AO Ouput voltage decreases with higher frequency

[dmbtj]

I am attempting to generate a 20KHz +/-10V signal with the PXIe-6363, however the amplitude on the 20KHz signal is only 1V pk-pk. How can I get better control of the output amplitude? I am using an AO port.

At 10KHz the signal is 2V pk-pk and at 1K 15.8V

At 100 Hz - 20V pk-pk ish.

Samples per buffer = 100

Cycles per buffer = 10

Waveform = Sine Wave

Using the Cont Gen Voltage Wfm-Int Clk example.

[johnsold]

What is your sample clock rate? How are you measuring the output?  What is the load?

Lynn

[Chris-NI]

Hi dmbtj,

In addition to johnsold's questions, it would also be useful if you could tell us about any capacitive/inductive characteristics present in your setup.  You may have a inadvertently created a low-pass filter in your system that is attenuating higher frequencies.

Regards,