This is a small ExpressPCB board to route the four clock pairs on J23 to SMA connectors

Mating connector options:  6469002-1-ND, 

* [https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Specification+Or+Standard%7F114-13059%7FP%7Fpdf%7FEnglish%7FENG_SS_114-13059_P.pdf%7F1469025-1 Doc 114-13059]