Title :
Frequency signal source´s PN (phase noise) measurements: Challenges and uncertainty
Author :
Rohde, Ulrich L. ; Poddar, Ajay K. ; Rubiola, Enrico ; Silaghi, Marius A.
Author_Institution :
BTU Cottbus, Cottbus, Germany
Abstract :
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.
Keywords :
UHF oscillators; correlation methods; frequency measurement; measurement uncertainty; noise measurement; phase measurement; phase noise; surface acoustic wave oscillators; SAW oscillator; cable length; cross-correlation method; filtering-phase-matching N-W; frequency 2.4 GHz; frequency signal source PN measurement; measuremen uncertainty; o-p load mismatch; oscillator noise measurement technique; phase noise measuremen; phase-inversion; Frequency measurement; Harmonic analysis; Noise measurement; Phase measurement; Phase noise; Cross-Correlation; Oscillator; Phase Noise;
Conference_Titel :
Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4799-8865-5
DOI :
10.1109/FCS.2015.7138792
