Disclosed is a radio transmitter outputting transmission signals changing transmission modes. The transmitter includes a detection unit and a processing unit. The processing unit includes a three power adjustment modes. A first adjustment mode stores a detection result when the transmission power is so adjusted that, in any one of the transmission modes, an error between a transmission power m and a prescribed transmission power becomes minimized. A second adjustment mode stores a detection result, in other transmission modes when a difference between a detection result at a time when the transmission power is adjusted and a detection result stored at said any one of the transmission modes converges. A third adjustment mode performs feedback control such that, in a desired transmission mode, an error is minimized between a current detection result and a detection result stored when said first and second power adjustment mode.

 
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