CC1101 Receiving sensitivity and Layout

There is one question about CC1101.

1.  There are inequalities in the measured values compared to the data sheet spec.

     In order to increase the receiver sensitivity, is there any way?

     (I want to increase the receiver sensitivity by changing register,  other parameters etc  or changes to the circuit board.)

      ->  Test condition:    Vdd = 3.0V:  38.4kBaud:  temp = 25[℃]  ,   Circuit constants are the same as CC1101EMK.

           Receiving sensitivity of the test board:    -101dBm  (Average)      >>>>>>>>>>   target:  -104dBm (Average)

           Datasheet spec:   -104dBm (typ)

Please tell us about the appropriate action.

best regards.