A bi-directional fixed-latency clock distribution system.
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| Title: | A bi-directional fixed-latency clock distribution system. |
|---|---|
| Authors: | Yang, Y.1, Ó Murchadha, A.1, Meures, T.1, Korntheuer, M.1, Hanson, K.1 kael.hanson@gmail.com |
| Source: | Nuclear Instruments & Methods in Physics Research Section A. Dec2013, Vol. 732, p497-500. 4p. |
| Subjects: | Cosmic rays, Clock distribution networks, Image reconstruction algorithms, Radio frequency, Antennas (Electronics), Digitization, Cosmic background radiation |
| Abstract: | Abstract: The Askar'yan Radio Array (ARA) Collaboration is constructing a giant array of radio-frequency antennas deployed in the ice near the geographic South Pole. This experiment aims at detecting the extremely weak signal of neutrinos with energies in excess of 100PeV from ultrahigh-energy cosmic ray interactions with the cosmic microwave background radiation. The antennas are located in shallow holes drilled to depths of 200m and need high fidelity RF signal transmission over extended lengths to the data acquisition logic at the surface. We report on a transmission scheme whereby signals are digitized in the ice and the waveforms are digitally sent via high-speed serial links. Reconstruction algorithms require distribution of a low-jitter clock from the surface down to the digitization boards in the holes with knowledge of the overall time delay between the two clock domains. Previously, we designed a clock synchronization system using electrical signaling over CAT5. This year we have updated our solution to optical fibers using high speed transceiver blocks in Spartan-6 FPGAs. This note describes our improvements on the latter solution: technical details as well as methods of maintaining a fixed phase between two clocks after power cycles and resets. [Copyright &y& Elsevier] |
| Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 92518935 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A bi-directional fixed-latency clock distribution system. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yang%2C+Y%2E%22">Yang, Y.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ó+Murchadha%2C+A%2E%22">Ó Murchadha, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Meures%2C+T%2E%22">Meures, T.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Korntheuer%2C+M%2E%22">Korntheuer, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hanson%2C+K%2E%22">Hanson, K.</searchLink><relatesTo>1</relatesTo><i> kael.hanson@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Instruments+%26+Methods+in+Physics+Research+Section+A%22">Nuclear Instruments & Methods in Physics Research Section A</searchLink>. Dec2013, Vol. 732, p497-500. 4p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Cosmic+rays%22">Cosmic rays</searchLink><br /><searchLink fieldCode="DE" term="%22Clock+distribution+networks%22">Clock distribution networks</searchLink><br /><searchLink fieldCode="DE" term="%22Image+reconstruction+algorithms%22">Image reconstruction algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Radio+frequency%22">Radio frequency</searchLink><br /><searchLink fieldCode="DE" term="%22Antennas+%28Electronics%29%22">Antennas (Electronics)</searchLink><br /><searchLink fieldCode="DE" term="%22Digitization%22">Digitization</searchLink><br /><searchLink fieldCode="DE" term="%22Cosmic+background+radiation%22">Cosmic background radiation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: The Askar'yan Radio Array (ARA) Collaboration is constructing a giant array of radio-frequency antennas deployed in the ice near the geographic South Pole. This experiment aims at detecting the extremely weak signal of neutrinos with energies in excess of 100PeV from ultrahigh-energy cosmic ray interactions with the cosmic microwave background radiation. The antennas are located in shallow holes drilled to depths of 200m and need high fidelity RF signal transmission over extended lengths to the data acquisition logic at the surface. We report on a transmission scheme whereby signals are digitized in the ice and the waveforms are digitally sent via high-speed serial links. Reconstruction algorithms require distribution of a low-jitter clock from the surface down to the digitization boards in the holes with knowledge of the overall time delay between the two clock domains. Previously, we designed a clock synchronization system using electrical signaling over CAT5. This year we have updated our solution to optical fibers using high speed transceiver blocks in Spartan-6 FPGAs. This note describes our improvements on the latter solution: technical details as well as methods of maintaining a fixed phase between two clocks after power cycles and resets. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.nima.2013.08.007 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 497 Subjects: – SubjectFull: Cosmic rays Type: general – SubjectFull: Clock distribution networks Type: general – SubjectFull: Image reconstruction algorithms Type: general – SubjectFull: Radio frequency Type: general – SubjectFull: Antennas (Electronics) Type: general – SubjectFull: Digitization Type: general – SubjectFull: Cosmic background radiation Type: general Titles: – TitleFull: A bi-directional fixed-latency clock distribution system. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yang, Y. – PersonEntity: Name: NameFull: Ó Murchadha, A. – PersonEntity: Name: NameFull: Meures, T. – PersonEntity: Name: NameFull: Korntheuer, M. – PersonEntity: Name: NameFull: Hanson, K. IsPartOfRelationships: – BibEntity: Dates: – D: 21 M: 12 Text: Dec2013 Type: published Y: 2013 Identifiers: – Type: issn-print Value: 01689002 Numbering: – Type: volume Value: 732 Titles: – TitleFull: Nuclear Instruments & Methods in Physics Research Section A Type: main |
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