频谱纯度 meaning in English
spectrum purity
Examples
- Sinewave spectral purity
正弦波频谱纯度 - Through the research of direct digital synthesizer ( dds ) used as a divider in phase lock loop ( pll ) , a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized
摘要通过对直接数字合成器在锁相环路中作为分频器应用的研究，使频率合成器可以在实现超细频率分辨率的同时达到高的频谱纯度。 - 3 . with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit , we have successfully enhanced sensitivity , expanded dynamic range , increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption . 4
3 、对通信机的全面改进，包括lna结构的调整、锁相环环路滤波器的优化、发射部分结构的调整以及中频解调电路的相差调整，提高了系统的接收灵敏度、改善了本振的频谱纯度、减少了锁相环的锁定时间、使中频解调后的信号质量大为提高，同时还减少了体积、节约了系统的功耗。 - The technology of frequency synthesis is important in latter - day communication system . it ’ s widely used in wireless communication and electron system . with the high - speed development of technologies , higher stability , higher purity , broader range and larger output number of frequency are required in the frequency source of frequency synthesizer which is the core of this technology
频率合成技术是近代通信系统的重要组成部分,在无线电通信与电子系统的各个领域中得到了广泛的应用。随着各种技术的飞速发展,人们对频率合成器的频率稳定度、频谱纯度、频率范围和输出频率的个数提出了越来越高的要求。