Receive Power Detecting on KeyFOB

I have done the reading of the RPD port on the KeyFOB from sparkFUn which incroporated the NrF2401+ module on it, but the thing is that RPD puts out a boolean values ,Dont you folks think that the RPD should read even if no key is being presed on the KeyFOB? as its giving RPD values only when i click on the buttons on the keyFOB.

Dont you folks think that the RPD should read even if no key is being presed on the KeyFOB?

I do not.

BUT i think as the XBee is able to read the connection available with the RSSI so should this RPD do the same?