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ADF7021 - Image Rejection filter calibration using the internal source

Question asked by Croco on Mar 22, 2010
Latest reply on Mar 23, 2010 by AndyR

Hello,

 

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.

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