The spectrum form of square-wave controlled laser, optical signal heterodyne detecting device and principle of electrical signal demodulation are considered with emphasis.
文中着重分析了方波控制激光器的频谱形式、光信号外差探测装置和电信号解调原理。
2
High speed dual inverter to control the current waveform, very high arc stableability, high quality AC squarewave, decrease the welding cost and increase the weld quality.
双重逆变高速控制电流波形，电弧稳定性极高，高品质矩形交流波，降低焊接成本，提高焊缝质量。
3
In the receiver, through the appropriate RC or LC network can filter out squarewave and high frequency modulation signal for simulating the reduction form.