ad9361 tx power of BW 20MHz

Hi ad9361 experts:
   I read the datasheet, and I want to confirm one thing. When the tx bandwidth is 20MHz, the tx attenuation is 0dB, and the tx lo frequency is 1.44GHz, what will the output power of ad9361 be? According to my test, it` s about -20dBm. Is this normal?

Thanks a lot.