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- Automatic Frequency Selection 自动频率选择
- The core part of the circuit is differential and frequency selection. 电路核心部分由微分电路和选频电路组成。
- Automatic frequency control (AFC) system is used to adjust the frequency of microwave power source to match the inherent frequency of acceleratory tube. 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。
- This article introduces the principle of the closed link automatic frequency control system in Z2000 spread spectrum transceiver and how to control it. 本文阐述了Z2000接收机内的闭环自动频率控制系统的工作原理,并说明如何控制这个系统。
- The generator of adaptive FH pattern is designed.By using it and the result of the LQA, adaptive frequency selection is accomplished. 设计了自适应跳频图案发生器,利用信道质量评估结果,完成了自适应频率选择。
- In order to make the RF source and the waveguide have the same resonant frequency,the automatic frequency control(AFC)system is used. 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)。
- The microwave oscillator frequency is locked to the resonant frequency of loaded resonator by means of automatic frequency control (AFC). 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 .
- All frequency injections of the receiver are controlled by a phase-locked digital synthesizer which allows incremental frequency selection in 10, 1 and 0.1 MHz steps. 接收器的所有频率注入在状态之前被控制-锁了允许第10;1和第0.;1个百万赫兹步骤的逐渐增加的频率选择的数传合成器。
- TheSPM-D10 synchronizer provides automatic frequency, phase and voltagematching using either analog or discrete output bias signals. 该扫描探针显微镜-D10的同步器提供了自动频率,相位和电压匹配使用模拟或离散输出偏置信号。
- The superficial layers are often frequency selective to transmission. 表层传播一般都有频率选择性。
- The system based on the principle of zero-IF is realized by WE905 chip combined with AFC (Automatic Frequency Control) circuits power amplify circuit and so on to communicate. 该系统主要基于零中频技术原理,在主芯片WE905的基础上,结合自动频率控制电路、滤波电路、信号放大电路等功能电路实现无线通信。
- Algorithms,such as automatic frequency control(AFC),automatic gain control(AGC),phase-amplitude tracking(PAT),and phase ambiguity detecting (PAD),were jointly used in this scheme. 综合应用自动频率控制(AFC)、自动增益控制(AGC)、相位/幅度跟踪、相位模糊检测等算法,在没有任何训练序列的情况下,能准确地恢复调制信号载波相位。
- Secondly, it introduces the frequency selection, EMC(Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal(L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman. 其次,介绍了其信号的频段选择、电磁兼容性及其调制和产生的基本原理,包括L5测距码、卷积码、QPSK调制以及Neuman.
- Recommends a principle and method of frequency selection range fixation in order to control the reliability of fuze action through the adoption of sampling discrimination in frequency modulated fuzes. 推荐一种利用采样鉴相技术在调频测距引信中进行选频定距、控制引信可靠作用的原理与方法。
- This algorithm is applied for carrrier and bit synchronization, AFC (Automatic Frequency Control) of MAX2820. The algorithm comprises of PN acquisition ,PN tracking, leftover carrier estimate and AFC algorithm. 本文中还讨论了零中频直扩系统的基带接收模块,用于载波同步和位同步,提取频偏信息,对射频芯片Max2820进行自动频率控制。 它包括了伪随机码的捕获、跟踪、残留频偏算法以及AFC算法电路。
- This paper introduces a simple, reliable AC power supply with constant voltage and frequency. The supply consists of a DC motor-AC generator set, a automatic voltage regulator (AYR), and a automatic frequency regulator (AFR). 本文介绍一种简单可靠的恒压恒频交流电源装置;它由直流电动机-交流发电机组、自动电压调节器AVR及自动频率调节器AFR组成.
- A wetness measurement system based on cavity perturbation method is designed for precise measuring,including automatic frequency tracing system and equal precision frequency measurement system. 以汽轮机内蒸汽湿度的准确测量为目的,设计了基于微波谐振腔微扰法的蒸汽湿度测量系统:自动频率跟踪系统和等精度频率测量系统。
- We get finally a multilayered LTCC three-stage bandpass filter with a small size and high frequency selectivity. 通过上述场与路相结合的设计方法,获得了尺寸小、频率选择特性好的多层LTCC三级带通滤波器。
- It is characterized by good frequency selectivity, low insertion loss and high attenuation of specified frequency. 它具有频率选择性好,通带插损低,对陷波频点抑制较高的优点。
- Frequency selective surface (FSS) is a two-dimensional periodical structure and used mostly in the filter. 频率选择表面(FSS)是一种具有二维周期性结构的滤波结构,主要在滤波器上使用。