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BOOSTXL-CC1120-90: The conduction output power of CC1120-CC1190 BoosterPack is much lower than the datasheet

Part Number: BOOSTXL-CC1120-90
Other Parts Discussed in Thread: CC1190, CC1120

 I use RF Studio to measure the conduct RF power of the CC1120-CC1190 BoosterPack and find that the max conducted power is about 22 dBm, which is much lower 26 dBm which is stated in the datasheet. The test point is shown in the following figure, remove C40 and weld coaxial cable.

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RF Studio is set as follows, with IOCXG0 register value of 0x73( CC1190 PA_EN).

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Then I tested the output power of CC1120, with the following test point,remove B39921B3588U410 and weld coaxial cable. When the register PA_POWER_RAMP is set to 0x37, the measured power is -0.2 dBm. Could it be that the CC1120 chip on this board is broken? What is the theoretical output power of this testing point when PA_POWER_RAMP is set to 0x37?