preset signal的意思|示意

Application MCU and digital signal processing technology to gain a preset and control, AGC has good stability, controllable range.

应用单片机和数字信号处理技术对增益进行预置和控制，AGC稳定性好，可控范围大。

The stopwatch, which counts backwards, emits a signal tone after a preset time has elapsed.

秒表，这倒计数，预设时间后，会发出一个信号音都过去了。

For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time.

对于精度球迷：倒数计时器帮助您记住放出一个在预设时间发声具体或反复出现的事件。