SFF-8472 section 9.3

The specification states, under 5)
Received power, RX_PWR, is given in uW by the following equation:

Rx_PWR (uW) = Rx_PWR(4) * Rx_PWR_ADe4 (16 bit unsigned integer) +
           Rx_PWR(3) * Rx_PWR_ADe3 (16 bit unsigned integer) +
           Rx_PWR(2) * Rx_PWR_ADe2 (16 bit unsigned integer) +
           Rx_PWR(1) * Rx_PWR_AD (16 bit unsigned integer) +
           Rx_PWR(0)

which means Rx_PWR_AD is raised to the power of 4, 3 and 2 respectively in the expression. The comment and code does not reflect that.

Furthermore, the calibration constants are stored in IEEE Std 754 single precision float format in the device. These cannot be treated as integers, as is done in the code.