| 摘要 |
<p>An interrogator (2) is provided with a modulating means (11) which modulates the phase of transmitting signals with a carrier, an amplifying means (14) which amplifies the output signal of the modulating means (11), a detecting means (11) which detects the phase change of the signals modulated in phase by means of the modulating means (11), and an amplification factor control means (17) which changes the amplification factor of the amplifying means (14) based on the detection signal of the detecting means (11).</p> |
