For example, when a safety door is open, a signal will be sent to the scanner mainframe to prevent scanning until the door is closed.

例如，当安全门被打开后，一个信号即被发送到扫描仪主机，在安全门被关闭之前禁止扫描。

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In scanner controlling aspect, a chromatism compensation technology is put forward, so as to solve the problem of signal attenuation and prolong the life span of scanners.

在扫描仪控制方面，提出了色差补偿技术，解决了扫描仪在长期使用后出现的信号衰减问题，延长了扫描仪的使用寿命。

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HOLD: The scanner will stop when a signal is received, and will not restart.

锁定：扫描将停在发现的一个信号频率上，不再继续扫描操作。

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The FM radio's scanner "found" a station at virtually every legal frequency, even when no signal was present--as well as several channels unusable in North America.

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