I'm working with an ADF7021 and I have to perform a calibration of the IR filter using the internal source.
I wrote a little program that works well with an external source but I don't succeed to use the internal source.
The datasheet says that I have to disable the LNA and enable the internal source but it's not really clear about how. I tried several sequences but in vain.
Can somebody explain me the procedure to disable the LNA and enable the internal source ?
In advance thank you.