在EMC实验室验证射频放大器特性

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI:10.1109/ISEMC.1999.812932

A. Manara, F. Colombo

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引用次数: 0

摘要

本文讨论了射频抗扰度测试(传导和辐射)中射频场调幅百分比调制的测量。国际标准对CDN(或天线)中注入的射频电压的调幅深度提出了要求，并规定了在标称值附近的公差，使用量程进行验证。如此小的公差(5%)很难用示波器测量，而且在示波器上看不到调制信号的其他差异。使用频谱分析仪，调制深度和谐波含量以及其他类型的失真可以一目了然，精度更高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Verifying RF amplifier characteristics at EMC lab

This paper deals with the measurement of AM percent modulation of the radio-frequency fields used in RF immunity test (conducted and radiated) International standards set a requirement on the amplitude modulation depth of the RF voltages to be injected in CDN (or antennas) and prescribe a tolerance around the nominal value to be verified using a scope. Such small tolerance (5%) is difficult to measure with an oscilloscope and (moreover) other discrepancies of the modulated signal are not visible on the oscilloscope. Using a spectrum analyzer the modulation depth and the harmonic contents as well other types of distortion can be seen at a glance with higher accuracy.

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来源期刊

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)

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