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- 10 layer PCB so that layout can be optimised for low-jitter
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oscillator
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### Additional connectors
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- High-speed connector for PPS in/out, 10MHz in, tx-abscal, rx-abscal,
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refclock. 6 signals to be transferred in a differential way Samtec
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Bulls-Eye connector (just a land pattern for 22 (?) signals on the
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PCB).
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- [Samtec Bull's eye connectors](http://www.samtec.com/BullsEye)
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### Other remarks from NIKHEF
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Some extra's that were on our list:
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oscillator. Ideas are still vague at this moment but the interface
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as such should already be on the list.
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### Use cases
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#### NIKHEF
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- Users will be first: research institutes, metrology institutes
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later: high performance users, telecom, ....
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- All users profit from an inherent high performance, relatively
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cheap, design without the bother of buying an expensive stable
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external oscillator.
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- So this is why priority is 1) performance, 2) cost.
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#### CERN
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- Replacement for DIO, ADC100M, TDC, Fine Delay, WorldFIP master.
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- Users will be CERN and most current SPEC users. 500 cards expected
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in 7 years
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- Priority 1) cost 2) performance
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-----
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## Accepted
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-----
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15 January 2018
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16 January 2018
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