It compares the pilot distance protection with power line carrier (PLC) in the single or double frequency and the differential protection with optical fiber in the loop or chain connection.
比较单频率与双频率载波通道的纵联距离保护和环状与链状连接光纤通道的差动保护方案。
The node is used as sampling flag and the beat-wave fringe fraction is measured with double frequency interferometer combined by optical components.
该装置以拍波合成的场强信号的节点为对准标志，以光路组合形成的双频激光干涉仪测量尾数部分。
Adopting mutually orthogonal magnetic fields, the power tuning curve is utilized for stabilizing optical frequency, the frequency difference drift of double frequency is lower greatly.
采用正交磁场由功率调谐曲线实现稳频，可使双频频差的漂移量大大降低。
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