自动频率控制

微波振荡频率用自动频率控制（AFC）的方法自动锁在有载腔的频率上。

The microwave oscillator frequency is locked to the resonant frequency of loaded resonator by means of automatic frequency control ( AFC ) .

自动频率控制（AFC）系统用于调节微波功率源输出的微波频率，使之与加速管的固有谐振频率匹配。

Automatic frequency control ( AFC ) system is used to adjust the frequency of microwave power source to match the inherent frequency of acceleratory tube .

本文实现了一种利用有源Q倍增谐振器稳定振荡器的自动频率控制系统。

An AEC system has been realized in which an active Q-multiplied resonator is used to stabilize the crystal oscillator .

为了使得射频源和波导管的频率保持一致，采用了自动频率控制系统（AFC）。

In order to make the RF source and the waveguide have the same resonant frequency , the automatic frequency control ( AFC ) system is used .

本文简述了西门子直线加速器自动频率控制系统（AFC）的基本工作原理，并据此原理总结排除AFC系统元器件故障的经验，优化AFC系统的调整方法探索。

To explain the fundamental work principle of AFC for Siemens accelerator linear , summarize the experience which remove breakdown of AFC system element , optimize regulative method of AFC system .

该稳定本振源由一个微波锁相环路（PLL）和一种新型自动频率控制电路（AFC）组成，文中分析了影响微波输出信号频谱纯度和相位噪声的主要因素。

The source consists of a microwave phase-locked loop and a new type of automatic frequency control circuit . Chief factors to influence spectrum purity of microwave output signal and phase noise are analyzed .

然后探讨了数控振荡器（NCO）和自动频率控制（AFC）的问题，提出了一种新的NCO结构，仿真分析了一种AFC方案的原理及其效果；

Thirdly numerically controlled oscillator ( NCO ) and automatically frequency controller ( AFC ) are studied . A new NCO structure is proposed , and the theory and effect of a kind of AFC is studied by simulation .

本文中简要分析锁相型自动频率控制系统的基本原理及其在实际应用当中遇到的问题，进而提出了一种新型的基于反射波极小值的AFC系统，并对其原理进行了深入的剖析。

Based on the analysis , a new AFC system based on self-optimizing control is proposed with the experience of experts . The paper generally analyses the basic principle of phased-locked discriminating automatic frequency control ( AFC ) system , and the problems faced in application .

所设计的数控晶体振荡器采用Pierce结构，利用基带与振荡器的反馈环路产生的6位自动频率控制信号，对振荡器的频率漂移进行校准，能得到长期稳定的频率输出。

The designed DCXO adopts Pierce architecture . The frequency drift correction is done by using a 6-bit automatic frequency control ( AFC ) signal generated by the feedback correction loop between the oscillator and the base band . The long term stable frequency output has been obtained .

卫星通信跟踪接收机自动频率控制环路分析

Design of Automatic Frequency Control Loop in Tracking-Receiver of Satellite Communication

雷达自动频率控制系统的设计

Design procedure of automatic frequency control system of radar

一种新颖的自动频率控制系统

A Novel Automatic Frequency Control System

脉宽式自动频率控制电路

Pulse width type AFC circuit

仿真结果验证了新型的多模式分频器自动频率控制及拓展线性区间的鉴频鉴相器与电荷泵结构。

Simulation results validate the new MMFD , the AFC algorithm and linear range extended PFD and CP configuration .

FAFD频率检测器可以应用于存在较大归一化频偏的通信接收机的自动频率控制环路中。

The detector can be used in adaptive frequency control loop of the receiver which has a big normalized frequency offset .

基于片上系统的设计思想，该接收机整合了数字下变频器、数字匹配滤波器、数字解调解扩、自动频率控制等功能模块。

Based on the idea of SOC ( system on a chip ), this receiver merges some function modules in a FPGA , such as digital downconverter , digital matched filter , digital dispreading and demodulation , demodulation and auto frequency control .

根据自动负荷频率控制原理，利用MATLAB提供的灵活高效、图形化的建模仿真环境，建立模拟两区域互联的自动负荷频率控制的模型。

According to the principle of automatic load - frequency control ( ALFC ), by using flexible , effective & graphical modeling provided by MATLAB , the model that simulates ALFC of two interconnected network is set up .

新疆电网自动频率发电控制

Automatic frequency and generation control system in Xinjiang power network

建模的主要目标是：反映自动负荷频率控制的实际过程，以及在这一过程中影响系统频率质量的主要因素。

The main purpose of modeling is to reflect the actual process of ALFC and main factors that influence the frequency quality of power system in the process .

在采样控制方面，采用自动采样频率控制和动态采样精度控制的方法，防止了混叠的产生，同时，保证了有较大的测量范围和较高的精度。

We adopt automatic sampling frequency control and dynamic sampling precision control so as to avoid mixed superposition as well as to ensure a larger measuring scope and higher precision .

详细研究了超声电源的自动频率跟踪系统的控制策略，建立了计算机测控系统的硬件电路和软件控制模块。

On the basis of discussing a frequency self-tracking control strategy for ultrasonic power supply in details , the hardware and software of a microcomputer measuring and control system are set up .

自动频率调整变压器雷达自动频率控制电路

Automatic frequency control transformer radar AFC circuit

芯片内部还集成了自动增益控制（AGC）、模拟自动频率控制（AFC）模块。

Automatic gain control ( AGC ) and automatic frequency control ( AFC ) were also integrated into the chip .

介绍了TPR－100型功率自动调节装置在新疆电网中发挥自动调频和调整电力系统时钟误差的功能，并进一步与EMS结合，实现电网的自动频率发电控制的应用情况。

According to the status quo of Xinjiang Power Network . this paper introduces the application of TPR-100 type system to automatic frequency regulation and clock time regulation of electric power system in Xinjiang Power Network . Combining with EMS .