The present invention teaches a data processing system capable of per forming a sampling frequency conversion 本发明系提供一个资料处理系统，能够执行一个取样频率转换。
Semiconductor devices - part 16 - 3 : microwave integrated circuits ; frequency converters iec 60747 - 16 - 3 : 2002 ; german version en 60747 - 16 - 3 : 2002 半导体器件.第16 - 3部分:微波集成电路.频率转换器
At present , we have achieved frequency conversion in pulse - wave and continue - wave as well as quasi - continue - wave by using quasi - phase - matched method 目前，利用准相位匹配技术已实现了脉冲、准连续和连续光的频率转换。
It makes the analysis of signal twitter and modulation very easy and the measurement of frequency drift and converting very simple 它使信号的抖动分析、调制分析非常直观，使频率漂移测量、频率转换特性测量变得十分简单。
To quiken the frequency switching speed , a method to aid capturing the frequency by presetting voltage is adopted , which produces ideal effect 在加快频率转换速度方面，采用了预置电压和鉴频鉴相相结合的辅助频率捕获方法，并取得了理想的效果。
The railway power converter system will change the frequency of electricity produced by the e . on power plant to the lower frequency used by rail systems in central europe - from 50 hertz ( hz ) to 16 . 7 hz 该铁路电力转换系统将把e . on电厂产生的电力频率转换成在中欧铁路系统所使用的更低频率? ? 50赫兹到16 . 7赫兹。
Some hybrid frequency synthesis methods for dds + pll which used usually are presented in the following section , and its analysis for phase noise , spur , and frequency jump speed was also introduced 接着对dds + pll频率合成器常用组合方案进行了介绍,并对dds + pll系统的相位噪声、杂散、频率转换速度进行了分析。
The circuit suit for long - distance transmission and monitoring and has high precision and anti - jamming characteristic . it measures the frequency by pci card which is base on the method of multi - period synchronization 应用电容-频率转换的数字化测量方法具有较好的抗干扰效果和较高的测量分辨率，适宜于远距离传输和监测。
This converter changes the carrier frequency of a radio signal from rf at the antenna to some intermediate frequency that an analog - to - digital conversion chip can transform into a software - processable format 从天线接收到无线电信号后，这种变频器将其中的载频转换成中间频率，然后类比数位转换晶片再将中间频率转换成可由软体处理的格式。
Introduction to communication systems ? analysis and design of communication systems ; analog and digital modulation and demodulation , frequency conversion , multiplexing , noise and distortion ; spectral and signal - to - noise ratio analysis , probability of error in digital systems , spread spectrum 通信系统基础：通信系统分析和设计，模拟和数字调制和解调，频率转换，统计复用，噪声和失真；谱分析和信噪比分析，数字系统误码率，扩展频谱。
