摘要
用于无线电监测的监测接收机,其扫描速度是一项重要指标。随着技术的发展,接收机的扫描速度已从几十MHz/s发展到数百GHz/s。当前的检测方法对检测设备要求甚高。本文介绍的检测方法,是用两台通用信号源,产生的信号落在接收机测量范围之内,接收机的中频输出到通用的调制域分析仪,当接收机测量到这两个点频信号时,调制域分析仪就能测量出接收机中频先后出现的时间间隔,通过计算两台信号源的频率差与时间间隔的比值就能得出接收机的扫频速度。此方法能方便地检测高达数百GHz扫描速度的监测接收机,且对用于测量的信号源和调制域分析仪没有特殊要求。
Scanning speed is an important parameter of monitoring receiver ,which is designed for radio monitoring .The magnitude of receivers’ scanning speed has improved from dozens M Hz/s to hundreds G Hz/s ,due to the advances in technology .The current detecting method is very demanding .Detecting method in this paper is to use two general signal generators ,whose signals fall in the range of monitoring receiver .Then the intermediate frequency of receiver output to modulation domain analyzer .When the receiver receives the two CW signals ,a modulation domain analyzer can measure the time interval of the receiver’s intermediate frequency .The ratio of frequency differences between signal sources and time interval is calculated ,and consequently we can infer the receiver frequency sweep speed .This measure method can easily detect scanning speed w hose order of magnitude is up to hundreds G Hz/s ,and has no special constraints to signal sources and the modulation domain analyzers .
出处
《国外电子测量技术》
2016年第3期85-88,共4页
Foreign Electronic Measurement Technology
关键词
监测接收机
扫描速度
调制域分析仪
信号源
monitoring receiver
scanning speed
modulation domain analyzer
signal generator
