| 摘要 |
PURPOSE:To make a receiver unit cope with plural reference signals using one interface by interconnecting a reference signal transmitter and a reference signal receive with an optical cable and providing a reference signal synthesizing means and a reference signal branching means on this system. CONSTITUTION:An optical fiber cable 20 is used for a transmission line from a reference signal transmitter 10 to a reference signal receiver 15 and an optical signal is transmitted therethrough. Moreover, a reference signal synthesizing means 14 of the reference signal transmitter 10 modulates a reference wavelength signal (c) by using a reference frequency signal (a) to send two kinds of reference signals through the optical fiber cable 20. Moreover, a reference signal branching means 16 of the reference signal receiver 15 regenerates the reference wavelength signal (c) from the reception signal and regenerates a reference frequency signal (a) by demodulating the reception signal. Thus, the reference wavelength signal (c) and the reference frequency signal (a) are distributed by the one optical fiber cable 20 and each reference signal is branched by one interface at the reference signal receiver. |
