I have troubles to understanding what is the meaning of parameters for transmitting power of RF-signal.
So for RF signal in the same frequency band and same application, on one hand I see the max. allowed mean power is e.g 50dBm. On the other hand I see another max. allowed power spectral density is e.g -3dBm/MHz. This really confuses me.
So the questions are:
What is the relation between mean power and power spectral density? How to convert one to the other ?
For e.g. if my device uses a 2GHz bandwidth, how do I know how much power the device is allowed to transmit ? How to calculate it ?
Thanks very much.