On the other hand, Castor 0.9.3 (the version I used) generates a spurious message to the standard output stream. The message I encountered.
另一方面，Castor 0.9.3(我使用的版本)向标准输出流生成了一个假消息。
2
The main merits of DDS are high resolution and fast frequency switching speed, but the defects of low output frequency and bad spurious performance restrict the application of DDS.
DDS的主要优点是其高分辨率和高捷变速度，但是其较低的输出频率和较差的杂散性能制约了其应用。
3
At first, this paper described the basic structure, working principle, sources of spurious signals and characteristics of output spectrum, of direct digital frequency synthesizer (DDS).