I am trying to operate with the EVAL-ADF4350EB2Z and producing 200&250 MHz signals, but I have few problems:
1. I can not find a place in the software, for input 2 different frequencies.
2. All the 4 signal out ports output at the same single frequency.
3. When I am looking at the output signal on the oscilloscope, I can see that the frequency is no accurate - 248MHz instead of 250, and also there are few additional frequencies (at 748MHz, stronger then the one of the 248MHz).

I would really like to understand what do I do wrong, and how to create the two frequencies which I want.

In addition, I am looking for a Lab-View/Matlab driver for this device, and I couldn't find it. Does someone have a thing like that?

Thank you so much!

  • 0
    •  Analog Employees 
    on Oct 28, 2020 9:08 AM 1 month ago

    Hi Schor,

    Unfortunately, it is not possible to get 200 and 250 MHz simultaneously at the outputs. Auxiliary output can be set to provide divided output which reflects the main output or fundamental VCO output. 

    Can you make sure PLL is locked with SSA or spectrum? Are you using external reference or on-board reference? 

    It makes sense to have harmonics of the fundamental output frequency since you are using div by 16.