| 摘要 |
PROBLEM TO BE SOLVED: To significantly shorten a time required for adjustment of DAC (Digital-Analog Conversion) codes stored in a linear interpolation table at an adjusting mode. SOLUTION: In adjusting gains of a transmission circuit 105 by using the linear interpolation table in an adjustment data storing section 109, the data are transmitted in a burst form and the gains are changed while successively referring to the table during the transmission, and changes in output power of a transmitter are collectively measured by using a spectrum analyzer 111. A PC 110 monitors whether or not an output waveform of the transmission circuit measured by the analyzer 111 is matched with an output waveform being predicted from retrieval data set in the PC 110, and if they are not matched each other, the PC 110 updates retrieval data setting in a shift register 117.
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