频率信号源的PN(相位噪声)测量:挑战和不确定性

时间频率公报 Pub Date : 2015-04-12 DOI:10.1109/FCS.2015.7138792

U. Rohde, A. Poddar, E. Rubiola, M. Silaghi

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引用次数: 0

摘要

本文介绍了振荡器噪声测量技术、挑战和相关的测量不确定度。在现代PN测量设备中使用的互相关方法，由于相位反转、谐波、o/p负载失配和电缆长度的影响，可能会产生错误的结果。本讨论对于使用2.4 GHz SAW振荡器验证的低相位噪声信号源是必要的，并讨论了通过使用滤波/相位匹配N/W来缓解这些问题的步骤。

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Frequency signal source's PN (phase noise) measurements: Challenges and uncertainty

This paper describes oscillator noise measurement techniques, challenges and associated measurement uncertainty. The cross-correlation method used in modern PN measurement equipments, can present erroneous result, depending upon phase-inversion, harmonics, o/p load mismatch, and cable length. This discussion is imperative for low phase noise signal sources, validated with 2.4 GHz SAW oscillator, and discussed steps for mitigating these issues by using filtering/phase-matching N/W.

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时间频率公报

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