Industrial "5G" Telecom Infrastructure Time and Frequency Reference

Jean-Charles Billebault, Didier Thorax, Nicolas Gufflet, Alexander Kovach, Vincent Candelier, Hamdi Henchiri, Ullas Kumar, Frédéric Vittrant

Abstract: New “5G” telecom market requirements and further “6G” emphasise the need for highly stable and reliable devices, capable to deliver time-phase and frequency stability, allowing precision over 1 day and more. The new RAKON smart OCXO platforms deliver an overall high stability solution and provide a competitive alternative to existing devices, adapted to the new infrastructure-architecture of the networks. Industrialization of recent designs and process control improvements have made possible a cost effective solution, which reaches very high levels of performance, using standard and industrial structures and readily available components. The main characteristics, obtained with our new platforms for “ROD5242T1” and “ROD3827T2” (OCXO operating at 10MHz and fitted with SC cut 3rd overtone quartz crystal resonator ), are : . thermal stability over – 40°C to +85°C better than 5E–11 (T1 Class) & 5E-10 (T2 Class), . residual ageing after compensation at less than a part in 1E-11 per day, . short term stability (Allan deviation) at a few parts in 1E-12 for t = 1s to 100s, . packages: 51.3 x 41.3 x 14.2 mm3 for T1 and 38.1 x 27.1 x 12.0 mm3 . compatibility with 5V supply voltage, . MTIE (max time interval error) with temperature variation & gradient of 10°C per hour: T1 stability class (± 20°C); T2 stability class (± 2°C) < 300ns over 6 hours ; < 300ns over 6 hours ; < 600ns over 12 hours ; < 700ns over 12 hours ; < 1.5µs over 24 hours ; < 1.5µs over 24 hours . This paper presents how Rakon deal with the various challenges to reach the required levels of performance with an industrial approach, an analysis of these OCXO platforms and related performances, and own-designed measurement systems for mass production measurement equipment.
Published in: Proceedings of the 51st Annual Precise Time and Time Interval Systems and Applications Meeting
January 21 - 24, 2020
Hyatt Regency Mission Bay
San Diego, California
Pages: 241 - 259
Cite this article: Billebault, Jean-Charles, Thorax, Didier, Gufflet, Nicolas, Kovach, Alexander, Candelier, Vincent, Henchiri, Hamdi, Kumar, Ullas, Vittrant, Frédéric, "Industrial "5G" Telecom Infrastructure Time and Frequency Reference," Proceedings of the 51st Annual Precise Time and Time Interval Systems and Applications Meeting, San Diego, California, January 2020, pp. 241-259.
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