jumps in RTT
Anders has observed 8ns jumps in RTT value (and as a result time jumps) in his 1000km WR instalation. The WR network consists of two SPEC cards, one in GrandMaster mode synchronized to external clock, and second in Slave mode. Graph presenting the issue: https://www.ohwr.org/project/white-rabbit/uploads/2ac1fc3ab0a25ea55657821485e799dd/MIKES_kajaani_rtt_graph_2013sep23.png