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# White Rabbit Calibration
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-----
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## Relative calibration
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- [White Rabbit devices
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calibration](https://www.ohwr.org/project/white-rabbit/wikis/Calibration)
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- provides coarse calibration values for the official releases of
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WR Switch and WR PTP Core firmware. You can use them as defaults
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for matching hardware and gateware version. However, to achieve
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the best possible synchronization results you should perform the
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full calibration procedure for your WR hardware.
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- [WR Calibration Procedure](https://www.ohwr.org/project/white-rabbit/wikis/Documents/White-Rabbit-calibration-procedure)
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-----
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## Absolute calibration
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New work underway to provide a method of absolute calibration of all
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elements of a WR device.
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-----
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24 March 2016
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