| 摘要 |
<p>PURPOSE:To adjust a delay of a transmission line automatically by providing a phase difference detection section obtaining a phase difference between a reference signal generated at a PN generating section and a reference signal detected by a PN reception section and outputting the result and a delay section retarding a phase of an input signal to a terminal station in response to the phase difference being the output of the phase difference detection section. CONSTITUTION:A PN generating section 100 generates a PN pattern signal of the same frequency as an input signal frequency to a terminal station and outputs it to a transmission line and generates a reference signal. A phase difference detection section 600 obtains a phase difference between a reference signal generated from the PN generation section 100 and a reference signal detected from the PN pattern signal received by a PN reception section 500 to obtain a phase delay in the transmission line. Then a delay section 800 delays the phase of the input signal to the terminal station in response to the phase difference being the output of the phase difference detection section 600. Thus, the delay of the transmission line is adjusted automatically without any processing to the transmission data itself.</p> |
