市电频率

Digital PLL's linear mathematical model is established, and it's stability is analyzed, then the DPLL's stability conditional expression is given. Whereas the phase lock in UPS is very particular, this dissertation emphasizes on the dynamic performance with disturbance of the utility source's frequency noise and the reference phase.

基于UPS 锁相的特殊性，着重分析了市电频率扰动以及相位给定突变时的系统动态特性，仿真分析表明在同一个数字锁相环中，锁相误差抖动小与输出频率变化不能过快，二者不可兼得。

The effect is an intermodulation of the applied signal at twice the line frequency.

指的是加载信号在两倍市电频率的互调。

This is fairly commonly utilized, and affects the line frequency component.

这种作法已经被广泛应用，并可以用以改善市电频率成分

To investigate this, I used a filter bank to obtain a set of signals locked to the incoming line frequency.

为了研究这一问题，我使用了一个滤波器组，来获得一系列固定在市电频率的信号。

I will assume the line frequency component has been balanced out with the standard "hum pot".

我将假设市电频率成分已经使用标准的平衡电位器消除。

My "mains" frequency is 60 Hz.

我的市电频率是60Hz。

AC Test Power Supply with AC-DC-AC conversion means, effectively prevent the mains voltage and frequency fluctuations of the dielectric loss test the accuracy of the impact of even the generator, the instrument can also be run correctly.

交流试验电源采用AC-DC-AC转换方式，有效避免市电电压及频率波动对介损测试准确性影响，即便是发电机发电，该仪器也能正确运行。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。