Preferably the common nodes (608, 609) have no additional electrical connection to the amplifier unit.

优选地，公共节点(608,609)没有到放大器单元的额外电连接线。

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If necessary, the area can be extended by adding additional repeater units, all connected to the same external antenna, using a signal splitter and line amplifier.

如有必要，该地区可以通过添加额外的扩展中继器的单位，所有连接到同一个外置天线，使用信号分离器和线路放大器。

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The output amplitude and the length of pulses train are greatly improved with additional semiconductor optical amplifier and filter in the optical fiber loop as the DC component of input keeps low.

光纤环形腔中光放大器、滤波器的加入，以及光脉冲直流基座的降低，可以明显改善输出的幅值和复制序列长度。

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