| 摘要 |
Provided are generating an amplitude signal and a frequency signal through signal processing of data, angle-modulating the frequency signal, adjusting a delay time of the amplitude signal, amplitude amplifying of outputting a signal based on a magnitude of the amplitude signal having the delay time adjusted, amplitude-modulating a signal outputted through the angle modulating, by the signal outputted through the amplitude amplifying, so as to output an obtained signal as a modulated signal, and delay processing of calculating a delay time difference between the amplitude signal and the frequency signal, based on the modulated signal, and performing feedback control for the delay time until the delay time difference is eliminated, only in a test period. Through the signal generating, a sinusoidal signal is outputted as each of the amplitude signal and the frequency signal during the test period.
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