...的幅度和方向分布均匀；如果给出一高于听阈的一特定频率稳态刺激信号，其反应相对集中于某一区域，即 出现锁相现象（Phase Lock）。有锁相现象存在说明存在着大脑对这一调制测试信号的反应。
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由于对流层散射信道存在严重的衰落现象，故而传统的锁相环机制在散射通信中往往难以奏效。
Because of the fading characteristic in troposcatter channel, the mechanism of traditional phase locked loop is difficult to achieve the effect in troposcatter communication.
本文分析了锁相环调速系统中两种失锁现象的原因，得出相应的计算公式，提出了克服失锁的办法。
Two kinds of cause of losing lock in PLL speed regulation system are analysed. Corresponding formulas are obtained. The ways of overcoming losing lock are put for ward.
从理论上对被动锁相技术中所存在的这种波长随机现象进行了分析和解释。
And theoretical analysis is given to explain these random wavelengths existing in this kind of technique for passive phase-locking.
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