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AD9958 DAC output noisy

Question asked by mkeh on Jul 19, 2016
Latest reply on Jul 19, 2016 by JLKeip


The sinusoids being produced by both channels looks like they aren't being sampled fast enough digitally.

Is there a way to speed up the sampling or have I done something wrong with the inputs?

 

Reference Clock is a 100 MHz, sinusoidal at 1.8 Volts (no offset)

Both outputs are set at 5 Mhz, and tested at a lower frequency of 2 Mhz and 4 MHz, but same problem.

This is the first time I'm actually dealing with a DDS system.

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