发明名称 |
OPTICAL COMMUNICATION EQUIPMENT |
摘要 |
PURPOSE:To adjust the transmission phase of a slave transmitter without provision of a non-signal region by providing a means to demultiplex a signal incoming from an outgoing transmission line and supplying the signal to a timing measurement means to a master transmitter. CONSTITUTION:A phase adjustment channel transmission circuit 306 and a directional coupler 307 being means to send a signal requesting timing adjustment to an outgoing transmission line 21 in the opposite direction are provided respectively to each of slave transmitters 30-1 30-n. Then a master transmitter 10 is provided with a directional coupler 103 and a phase adjustment channel reception circuit 104 as means to demultiplex a signal coming from the outgoing transmission line 21 and to supply the signal to a phase adjustment measurement circuit 105. Then the slave transmitters 30-1-30-n detect a phase adjustment request signal coming up reversely through the outgoing transmission line 21 to measure the propagation delay time and the slave transmitters 30-1-30-n adjust the transmission phase of an incoming signal based on the result of measurement. Thus, the transmission efficiency is enhanced. |
申请公布号 |
JPH04304741(A) |
申请公布日期 |
1992.10.28 |
申请号 |
JP19910122014 |
申请日期 |
1991.04.01 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
KAKINUMA RIYUUMA;HAYASHI KAZUHIRO |
分类号 |
H04J14/00;H04B10/27;H04B10/278;H04J3/06;H04J14/02;H04L12/40 |
主分类号 |
H04J14/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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