您要查找的是不是：
- RMS is a fundamental measurement of an ac signal. 有效值(RMS)是对交流信号的一项基本测量。
- This instrument can measure AC signal frequency either of the single phase voltage or of the tri-phase voltage. 本表既可测交流单相电压信号之频率,亦可测交流三相电压信号之频率。
- A continuity tester injects an AC signal into the conductors of a cable to find circuit faults. 一个连续性测试器给电缆导线注入交流信号，从而找到电路故障。
- An arc due to an AC signal usually quenches itself as soon as the voltage level passes through zero. 交流（AC）信号产生的电弧通常在电压通过零点时就会自己熄灭。
- The circuit injects an ac signal on one wire of a cable and then looks for an absence of capacitive coupling to the other wires. 电路在电缆的一条线中输入交流信号，然后寻找其他线中电容耦合的缺少。
- For AC voltage measurement, an rms converter circuit or a precision rectifier circuit convert the AC signal into a DC voltage. 对于交流电压测量，利用有效值转换电路或精密整流器电路将交流信号转换成直流电压.
- The frequency at which the voltmeter's response to an AC signal drops to 70% is often denoted as the “3dB point” (f3dB). 电压表对交流信号的响应降低到70%25时的频率常常称为“3dB点”（f3dB）。
- With the information and the undistorted parts, the whole spectrum can be recovered by solving the nonlinear equations, so the AC signal is also recovered. 这一先验知识结合信号中未失真的频谱部分，通过求解一组非线性方程即可近似恢复出交流信号的全部频谱，从而恢复出完整的交流信号。
- The instrument is made up of an oscillating detector, which converts the distributed voltage of an insulator to ac signal for further treatment, a singlechip-microcomputer unit and a speaker system. 仪器采用振动式探头，把绝缘子的直流电压变成交流信号，处理后，语音直接报出绝缘子的电压值。
- The ac signal can be sampled cycle by cycle continuously without the requirement that the sampling frequency must he the integer or rational number times of the ac signal frequency. 交流信号被逐个周波地采样，而不必满足采样频率必须等于交流信号频率的整数倍或有理分数倍这一条件。
- RF (or microwave) signals have switching considerations that differ from those for DC or low frequency AC signals. 射频（或微波）信号的切换不同于直流（DC）或低频交流（AC）信号。
- The AC converter changes AC signals to DC, while the ohms con verter provides a DC analog signal for resistance measurements. 交流变换器将交流信号变换成直流信号，而欧姆变换器则给出直流模拟信号以进行电阻测量。
- The sampling rate of a data acquisition system (for AC signals) is very important. 数据采集系统的采样率(对AC信号)是十分重要的。
- Considering the interaction between the AC signals of two sides in AC/DC/AC system, the intermodulation production in DC side was analyzed. 将谐波和间谐波的分析统一起来。并指出直流侧的纹波信号是变流器产生间谐波的直接原因。
- Fast sampling technique of AC signal; 快速交流采样;
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- I stood watching for the signal to change to green. 我站着等待交通信号转为绿灯。
- Let's set the clock by the radio time signal. 咱们照着收音机的报时信号把钟对一对。
- A red lamp is often a danger signal. 红灯常常是危险的信号。
- A reflected signal on a communication channel. 一种在通信信道上反射回来的信号。
