1) frequency tuning word
频率控制字
1.
It also presented a method of realizing frequency modulation by real-time changing frequency tuning word of high-speed phase accumulator, Frequency sweep, FM and FSK modulation are analyzed and designed.
在利用可编程电路实现高速直接数字合成的基础上,提出了一种通过实时改变直接数字合成频率控制字,直接实现波形频率调制的方法。
2) frequency control word
频率控制字
1.
Through analyzing the traditional implement method,the phase(error is) introduced by the quantization error of the frequency control word is put forward.
介绍了一种对基于DDS的数字本振的改进,分析了传统的数控振荡器的实现方法,指出其中由于频率控制字的量化误差带来的振荡器输出相位误差。
2.
According to the principle of Direct Digital Synthesis,an idea for generating DDS frequency-modulated wave by single signal is presented by adjusting frequency control word in look-up-table to achieve digit sequence.
依据DDS基本原理,为实现单音调频波的DDS,提出了通过调整频率控制字来查表得到所需信号数字序列的思想,并进行了理论分析和研究,得到了计算方法,其结论用MATLAB6。
3) digital control/pulse frequency modulation
数字控制/脉冲频率调制
4) digital control/sampling rate
数字控制/采样频率
5) frequency control
频率控制
1.
Design of frequency control circuit of a uncorrelated frequency agility radar signal source;
非相参捷变频雷达信号源频率控制电路的设计
2.
Two kinds of wind power generation systems are introduced as well as the frequency control,power control and rotational speed control of generator in parallel operation.
介绍了风力发电系统的两种形式和并网运行的频率控制、功率控制、发电机转速控制。
3.
According to its characteristic and scheme, a frequency control loop based on the model of DFIG based wind turbines is proposed and it is implemented in the simulation package of DIgSILENT/PowerFactory.
文中以双馈变速风电机组模型为基础,根据双馈变速风电机组控制特点和控制过程,在电力系统仿真软件DIgSILENT/PowerFactory中增加了频率控制环节,在系统频率变化时,双馈变速风电机组通过释放或者吸收转子中的一部分动能,相应增加或者减少有功出力,实现了风电机组的频率控制。
6) Matching frequency
控制频率
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条