Gunn, L.Catlow, P.Al-Ashwal, W.Hartnett, J.Allison, A.Abbott, D.2014-05-162014-05-162014IEEE Transactions on Instrumentation and Measurement, 2014; 63(4):889-8950018-94561557-9662http://hdl.handle.net/2440/83000We propose a novel technique allowing the use of the three-cornered-hat method with two devices under test (DUTs) and a time-tagging system that employs a common reference oscillator. The precision of a time-tagging system is reduced by fluctuations in the timebase, which are canceled when the relative phase between the two DUTs is measured. However, the raw time-tags in this system provide a phase comparison between the DUTs and the system timebase, allowing the use of the three-cornered hat with some dual-channel measurement instruments.en©2013 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.Frequency stabilitynoise measurementphase noisetest equipmentthree-cornered-hat method.Journal article00201365402014051511260310.1109/TIM.2013.22857960003329607000152-s2.0-8489649475615581Al-Ashwal, W. [0000-0003-0445-1354]Allison, A. [0000-0003-3865-511X]Abbott, D. [0000-0002-0945-2674]