FM/PM：调频/调相

英文缩写词FM/PM的例句

1. The principle of the core of steady power supply by program control & digitalsynthesize sine wave generator is proposed, and the applied circuits of amplitude modulation, frequency modulation, phase modulation are presented.
2. 介绍程控稳功源中的核心部件&数字合成正弦波发生器的原理，并给出了调幅、调频、调相的实用电路。
3. This basic source has both the merit of DDS such as low resolution, easy to realize the frequency modulation and phase modulation, and the narrow-band tracing filter merit of PLL to obtain the low spurious.
4. 这个基本信号源既有DDS的细步进，容易实现数字调频和调相的优点，又能有锁相环良好的窄带跟踪滤波特性相结合的低杂散的优点。
5. As the two traditional methods of digital modulation, frequency modulation and phase modulation, have some defects, such as low spectrum utilization rate, poor resistance to multi-path fading, slow power spectrum decaying, serious out-of-band radiation.
6. 传统的频率调制和相位调制两种数字调制方式都存在频谱利用率低、抗多径衰落能力差、功率谱衰减慢、带外辐射严重等不足。
7. The velocity modulating method that combines frequency modulation and phase modulation is applied, frequency modulation is the main method, when large modulation range is needed, it can change into phase modulation.
8. 采取了变频、调相相结合的速度调节方法，考虑到超声马达通常用于谐振点附近，因此，以变频调速为主，当需要较大调节范围时，可切换到变相位差调节方式，满足调节范围要求。
9. Taking the market element into account, the computation methods of coal-saving benefit, frequency modulation benefit, phase modulation benefit, emergency auxiliary benefit and black-start benefit are established.
10. 在考虑市场因素的前提下，分析了抽水蓄能电站节煤效益、调频效益、调相效益、事故备用和黑启动效益的计算方法。