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AWR2243: RF monitor-TX gain phase mismatch

Part Number: AWR2243
Other Parts Discussed in Thread: AWR1243

Hi,

   When I test TX gain mismatch, I find the gian of TX2 is lower than other two TXs.  The same thing happens with TX phase mismatch.

                   

   But I find some intresting info in  " Monitoring Application Note for AWR1243, AWR2243" , content shows below:

    

  So, after 25℃ calibration the TX gain mismatch is great, but before 25℃ calibration it's bad and as  I tested.

  But I don't understand what means 25℃ calibration. Can you help me explain?