TX attenuation setting in AD9361 and output power

Hi 

i am using AD9361 with altera Cyclone V SOC and running baremetal application for controlling AD9361.

everything is working fine but when i set TX attenuation setting below 10000mdB software get hangs and

in output only LO frequency is seen.

This is with my custom Board, in dev board it is working. I have searched everything but did not get the solution.

please help me to resolve the issue.

regards

anki

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