基于信号源与频谱仪的相位噪声测试软件设计

基于VC＋＋平台设计一款信号源与频谱仪的联控相位噪声测试软件,由于具有前置放大器的先进频谱仪的电平测量准确度高本地噪声小,因此可用此类频谱仪测得信号源的相位噪声。利用Agilent信号源与频谱仪联合测试的方法,推导出频谱仪测量被测系统噪声的修正公式,并在相位测试软件中对所测噪声加以修正,最终利用Agilent VISA编程接口设计出测试软件实现了智能化测试被测系统的相位噪声。

Phase noise test software based on signal source and spectrum analyzer

This paper designed the software based on VC++and used for testing phase noise,the software can control signal source and spectrum analyzer simultaneously.Because the spectrum analyzer that has the preamplifier has high level measurement accuracy and low local noise,we can use this spectrum analyzer to test phase noise.This paper deduced the modified formula of using Agilent signal source and spectrum analyzer test system phase noise and modified the phase noise in the designed software.Finally realize the intelligence test of phase noise by Agilent VISA programming interface.