The optical signal was amplified by a lock-in amplifier.

光信号用锁定放大器放大，进行动态测量。

Its signal magnifying and processing achieved by lock-in amplifier.

它的信号放大、处理主要由锁相放大器完成。

Used lock-in amplifier SR844 for hardware phase detection and compared with software detection.

利用锁相放大器SR844对产生的信号进行模拟鉴相，并同软件鉴相结果比较分析；

A lock-in amplifier is used to supply the driving signal and to detect the output signal corresponding to the sample's strain.

使用锁相放大器提供驱动信号，并同时检测对应于样品形变的输出信号。

It USES a lock-in amplifier for testing the signal and a personal computer for automatic data scanning, collecting and processing.

利用锁相放大器追踪测量信号，微机自动扫描、采集和处理数据。