由于现有瞬时测频技术精度的限制，无法直接对其频率跟踪精度进行检定。
For the limitation of the accuracy of IFM technology, the frequency tracking accuracy can't be examined directly.
采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
本文提出了通过系统设计的方法将频率捷变雷达综合测试仪频率跟踪精度的检定在中频进行。
The system design method proposed by the paper examines the frequency tracking accuracy of the frequency agile radar synthesis detection unit at intermediate frequency.
系统高精度、低成本，适用于任何状态的导航以及高频率的输出，可以用于诸如载体跟踪、航空、自动采矿以及精细农业等广泛的应用领域。
Due to its high accuracy, low-cost, full navigation states, and high output rate, the system has wide applications, such as vehicle tracking, aviation, automatic mining, and precise farming.
新算法可以自适应地调节本振频率跟踪载波频率的阶距，从而很好地缩短了AFC的跟踪时间和改进了频率校正的精度。
It adopts auto adaptive step to track the frequency offset, so that it can shorten the AFC (Automatic frequency correction) tracking period and improve frequency precision.
本文对LDV系统的频率跟踪器进行了全面的误差分析，并据此设计了高精度微机数据处理器。
The track error of the frequency tracker in LDV System is thoroughly derived and analyzed. On these grounds, a high accuracy data processor with microcomputer is designed.
提出了一种适于高精度实时电力谐波分析的自适应调整采样频率的电网频率跟踪算法。
An adaptive sampling frequency tracking algorithm which adapt to realization of precise real time harmonic analysis is introduced.
该方法频率测量精度高，实行频率跟踪采样，提高了电压计算精。
Simulation shows that the frequency measurement has preferable precision and voltage calculating is improved by frequency tracking.
该电路频率跟踪速度快，精度高，并能对输入信号的频率变化进行预测和补偿。
The DPLFM has a high speed of tracking signal frequency and high precision, and also can predict and compensate the change of the input signal frequency.
因此，在理论上，该方案的跟踪精度要优于叉积自动频率控制环。
Therefore, in theory, tracking precision of the proposed scheme will precede CPAFC.
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。
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.
实验测试结果表明，所设计的数字式自适应控制器具有频率跟踪和摆幅控制精度高的特点。
The testing data from simulated aerospace environment show that the adaptive controller has a characteristic of high accuracy of frequency-tracking as well as high accuracy of swing scan control.
采用此算法可实时跟踪电网频率波动，极大地减小频谱泄漏提高谐波测量精度。
This method adjusts sampling interval to trail after the power system frequency while harmonics analyzing, so that this method greatly reduces the spectrum leakage.
采用此算法可实时跟踪电网频率波动，极大地减小频谱泄漏提高谐波测量精度。
This method adjusts sampling interval to trail after the power system frequency while harmonics analyzing, so that this method greatly reduces the spectrum leakage.
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