eRTM14/15 - High Performance White Rabbit Timing Receiver in MTCA.4 format
The HP WR Timing Receiver is composed by two MTCA eRTM (Rear Transition Module) modules:
Digital board (WR node), sitting in the slot 14. The board provides a redundant uplink to the WR network (2 SFP ports) and hosts the FPGA that implements the WR stack.
RF board, using the slot 15. This board produces the Local Oscillator/Reference RF signals using a DDS as well as two configurable digital LVPECL clocks. They are distributed to the RTM/AMC slots of a MTCA.4 crate through the MTCA.4 RF Backplane
The two boards always go together (stacked in a "sandwich" form) into the neighboring backplane slots 14 and 15. Inter-board communication is done through a high speed board-to-board cable.
 Image of the eRTM14/15 board set
Kintex-7 (XC7K70) FPGA
White Rabbit Core with redundant WR links
Fully deterministic gigabit transceiver (GTX) with no-phase-jump mode
Controls the RF board through the board-to-board connector
16 eRTMs tested OK (2 underperforming in terms of phase noise). 2 installed in SPS RF system, 4 in labs, 4 in CEM labs Likely new production needed because of high interest. Would need a new version (see Issues).