AnsweredAssumed Answered

Getting problem while limiting the gain index

Question asked by alampa on Mar 17, 2017
Latest reply on Mar 22, 2017 by mhennerich

Dear all,

 

I am working on AD9361 and trying to limit the gain of AD to 25 db gain by limiting the gain index to 33 and using the slow AGC mode. As I run the code after making these changes I am getting error message on console as below:-

 

failed to find suitable LPF TIA value in gain table

ad9361_init : AD936x Rev 2 successfully initialized

failed to find suitable LPF TIA value in gain table

 

When we run this code it seems that AGC is not working properly as we are getting ADC overloaded above -35 dbm input. When we are limiting the gain to 35 db gain by limiting the gain index to 47 we are not getting this error and AGC looks to working fine and we are able to put input to AD from 0 to -35 dbm.

 

Please let me know the possible reasons for this. Thanks in advance.

 

Regards

Parvez Alam

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