Changing from one preset current to another can be simple as pressing a button, or switch automatically at an adjustable frequency.
从一个电流转换到另一个电流只需简单的一个按钮﹐或者在一个可以调节的频率下自动切换。
2
In addition a digital signal generator was incorporated via a DDS chip AD9850 from Analog Devices inc, featuring accurate frequencypreset, quick phase transformation and low phase noise.
The method comprises the following steps: sending a detection message with a sequential identity to an RP to be detected according to a preset sending frequency;