| 摘要 |
<p>PURPOSE:To attain the transmission at an object power even when transmission power is fluctuated by extracting part of power sent to an antenna, obtaining an attenuation from the output, and replacing the set attenuation into the actual attenuation when a difference from the preset attenuation exceeds a permissible value. CONSTITUTION:When a power amplifier circuit 2 starts the transmission upon the receipt of a transmission command from a CPU 15 via a signal line 25, part of the transmission output is extracted by an antenna monitor section 21. The CPU 15 fetches the data of the transmission output and compares the data with an output designation value to calculate the actually measured attenuation. Then the CPU 15 obtains a difference between the attenuation in a ROM 16 and the actual measurement attenuation and erases the data of the attenuation so far electrically when the difference is the permissible value or over and writes the actual measured attenuation to the ROM 16. Thus, whether or not the attenuation is fluctuated is detected and when fluctuation is in existence, it is revised by the actual measurement data. Thus, the fluctuation due to a secular change of the frequency characteristic of the transmission output or the like is processed.</p> |
