For a couple of months I'm testing the AD6679 ADC and there's a problem that can not be solved, maybe you'll help with this:
In the spectrum of the digitized signal there are undesirable inharmonic distortions that depend on the frequency and level of the main signal.For example 170.3 MHz signal:
and it's analog from the datasheet:
And one more example 340.3 MHz signal:
These distortions are present throughout the spectrum of the signal and are not harmonic. Nothing is written about this in the datasheet. Therefore, I want to know the cause of these distortions and how to get rid of them.
Best regards Petrishchev Sergey.
Hi Petrishchev Sergey,
Your situation sounds similar to an example given in the following Analog Dialog article http://www.analog.com/en/analog-dialogue/articles/whats-up-with-digital-downconverters-part…
Sorry for this laundry list of questions but these are the types of details we need to zero-in on your reported issues.