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Tx Power Monitor damages received signal

Question asked by akoynov on Mar 14, 2014
Latest reply on Mar 19, 2014 by tlili

It was noticed that Tx power monitor being used in Continuous mode makes received signal distorted. As One shot mode has confirmed by ADI to be unusable (messing up transmitting signal) and because the only recommended way to enable Continuous mode is via register 0x001, it must be turned on after AD9361 enters Tx state and turned off after measurement has been completed, but before Rx.

 

When we do so, we observe EVM of received signal is deteriorating from 32 dB to 20 dB or lower, which is critical in our application.

 

I wonder if this is a know issue and if so, is there a workaround?

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