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- [ngVLA Memo \# 22: *Sub-Nanosecond Time Accuracy and Frequency
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- [ngVLA Memo \# 22: *Sub-Nanosecond Time Accuracy and Frequency
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Distribution*](https://library.nrao.edu/public/memos/ngvla/NGVLA_22.pdf),
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Distribution*](https://library.nrao.edu/public/memos/ngvla/NGVLA_22.pdf),
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C. van Tour and J.C.J. Koelemeij, Sept.2017.
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C. van Tour and J.C.J. Koelemeij, Sept.2017.
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- adding OCXO to the WRS low-jitter daughterboard to further
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- Adding a OCXO to the WRS low-jitter daughterboard to further
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clean up of phase noise.
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clean up of phase noise.
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- Note that the results with the additional clean-up
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oscillator require the White Rabbit Grandmaster (GM) to be
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locked to a sufficiently stable oscillator, such as a
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rubidium or cesium clock, or a hydrogen maser. The clean-up
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oscillator will not be able to track the free-running clock
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of a WR master, which is too unstable. With only the Low
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jitter daughterboard it will work fine on a free-running GM.
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- [Frequently Asked Questions](FAQ)
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- [Frequently Asked Questions](FAQ)
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- [Gateware and software (download and
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- [Gateware and software (download and
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building)](Gateware-and-software)
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building)](Gateware-and-software)
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-----
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-----
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Mattia Rizzi, Erik van der Bij - 27 October 017
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Mattia Rizzi, Erik van der Bij - 30 October 017
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