文中着重讨论了本振频率冷跟踪误差问题。
There are two kinds of errors, cold tracking error and post-hot-tracking error.
本文从旋转变频磁控管式频率捷变雷达的本振频率跟踪原理出发，分析了产生本振频率跟踪误差的主要因素。
The' main factors resulting in local frequency tracking error are analyzed based on the principles of the tracking local oscillator for frequency agile radars of rotary tuning magnetron type.
作者的主要工作就是设计数字电视发射机中的本振频率源，这是上海明珠公司数字电视发射机开发项目的一个重要部分。
The author's main work is the development of the lo (local oscillator) in DTV transmitter, it is one of the important research projects planned by Shanghai Mingzhu Company.
同时也提出了热跟踪后本振频率跟踪误差项。分析前者，可以决定热跟踪电路应予修正的频率范围，而后者则是跟踪本振最终的误差。
The former determines the frequency range which should be revised by the hot tracking circuit, while the later is the final frequency error of the local oscillator.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
介绍了采用置频等待、数字本振及微处理机技术实现非相参捷变频自适应雷达频率控制的方法。
This paper introduces a method to realize frequency control of a noncoherent frequency-agility adaptive radar by using frequency setting and waiting, digital local oscillator and micro-processor.
本讲义的重点，是说明频响函数（FRF）测量结果是如何与结构模态振型和振动频率建立联系的。
The major point of the text is to show how frequency responsefunction (FRF) measurements are related to the structure's mode shapes and vibrational frequencies.
频率合成器是作为接收机中的重要模块，它的性能指标直接决定了本振信号(LO)的精度和纯度。
Synthesizer is an important block in the receiver whose performance is directly related to the accuracy and purity of the local oscillator signals (lo).
应用该方法可使其在所用频率点上无相位截断噪声，从而使调谐器本振的相位噪声大大改善。
According to this method all the DDS output frequencies have no phase truncation noise, so the phase noise of the tuner local oscillator is greatly (improved.)
应用该方法可使其在所用频率点上无相位截断噪声，从而使调谐器本振的相位噪声大大改善。
According to this method all the DDS output frequencies have no phase truncation noise, so the phase noise of the tuner local oscillator is greatly (improved.)
应用推荐