I am confused with 89dB tx gain of USRP B210 and what is the meaning of
89dB gain? How this value relates to maximum output of 50mW in B210?
Because this value is too much high, as a example: If the RF output
of AD9361 agile transceiver is -29dBm and after we apply 89dB gain,
transmit power should be 50dbm, But 50dBm is too much higher than 50mW.