We use the principle of lock - in amplifier to amplify the weak singal and send it to A/ D conversion properly.

为将接收二极管上的微弱信号送到A／D转换器处理，采用锁定放大原理设计接收信号的调理电路。

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Means are then provided at an optical receiver to discover and lock onto floating wavelength grid of transmitted WDM signals and thereafter demultiplex the transmitted WDM signals for OE conversion.

然后，在光接收器处提供一些装置，以便发现并锁定发送过来的WDM信号的漂移波长栅格，这之后对发送过来的WDM信号进行多路分配以便于OE转换。

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Joining the euro means that Britain will have to lock the pound against the euro at a fixed conversion rate.

ECONOMIST: Britain and the euro

But lock Attwood ploughed over in the corner to level the score before Carlos Spencer missed the conversion attempt.

BBC: Gloucester 13-13 Worcester