If you are using DW1000 at maximum TX power(-33.5dBm/MHz= 0.446mW/MHz) can not hurt humans but, there is a regulatory limit which is -41.3dBm/MHz. Thus, you need to calibrate the TX output power with your device not to exceed the regulatory limit.
I would like to know the power spectral density (PSD) of dw1000 at a frequency of -41.3 dBm/MHz, and the transmit power under the condition of bandwidth of 500 MHz and central frequency of 4 GHz. Additionally, please provide the calculation formula.