Post Go back to editing

DDS sine output IP3

Category: Hardware
Product Number: AD9834


I'm using AD9834 EVB which contains the DDS device together with 75MHz source clock (MCLK=75MHz).

Output configuration is Sine Wave.

I noticed that together with the expected programmed frequency, I also get at the output a frequency which is equivalent to MCLK - 2xf_out.

For example, when the output frequency is programmed to 23MHz I get 29MHz at the output (in addition to the expected 23MHz).

Measurement equipment is digital oscilloscope, using the FFT function.

Any suggestions?