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. 2017 Sep 1;3(9):e1603317. doi: 10.1126/sciadv.1603317

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 6 — Schematic representation of the process used to retrieve the dependence of f_b on f_rep by measuring the beat notes in the 125- to 250-MHz range.