| 摘要 |
PURPOSE:To attain smooth switching without causing transient response by sending a prescribed control data from a storage means being an active system to a power control means immediately when a changeover control means is operated and a power supply relating to the active system is turned on. CONSTITUTION:Suppose that, e.g., a system (a) is switched into the active system, a selection register 201a receiving a switching command to the active system sends immediately a prescribed control data to its own adder 202a. The control data is generated by the system (b) and referred to as a system (b) control data. On the other hand, the system (a) control data based on the output of a detector 17a and the output of a latch 19a is inputted to an adder 202a. A desired control data taking an error on the characteristic of the system (a) into account to the system (b) data is formed to an adder 202a and it is fed to a transmission power controller 21a. The switching is similar even when the system (b) is switched and transmission controllers 21a, 21b apply gain control of an intermediate frequency amplifier based on the control data having nearly equal contents. Thus, the transmission power control is switched smoothly without causing a large transient response.
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