wrusers.md

@@ -24,6 +24,13 @@
       - Radio-Frequency Group, Feedbacks and beam control (M.Sundal,
         [BE-RF-FB](https://espace.cern.ch/be-dep/RF/FB/default.aspxm),
         June 2013)
+          - Module in the PS that will receive information about the
+            B-train over White Rabbit and calculate the RF frequency.
+            Part of the upgrade of the RF program in the PS. Prototyping
+            with [SPEC](https://www.ohwr.org/spec/wiki) and [WR Starting
+            Kit](https://www.ohwr.org/project/wr-starting-kit/wiki).
+            Final system will use the
+            [SVEC](https://www.ohwr.org/project/svec/wiki).
       - CNGS Timing for neutrino measurements (May 2012)
           - [*Performance results of the first White Rabbit installation
             for CNGS time