Science Standalone Switch White Rabbit

White Rabbit Switch – WRS

The White Rabbit Switch provides sub-nanosecond accuracy and picoseconds precision of synchronization for large distributed systems.

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KK 224_White Rabbit Switch
KK 223_White Rabbit Switch
KK 220_White Rabbit Switch
KK 215_White Rabbit Switch

White Rabbit Switch allows for deterministic and reliable data delivery. White Rabbit allows you to precisely time-tag measured data and lets you trigger data taking in large installations while at the same time using the same network to transmit data. White Rabbit works on a distance range over 10km using optic fiber and allows to connect thousands of nodes in the network.

Technical Parameters

Front Panel

  • 5 SMC connectors (1-PPS input and output, 62.5 MHz output, 10 MHz input)
  • 18 cages for Gigabit SFP transceivers (connected to Xilinx GTXs)
  • 10/100 Ethernet management port (connected to ARM CPU)
  • Mini-USB UART management port (connected to ARM CPU)
  • Power and Status LEDs
  • Link and Act LEDs for each SFP cage

Back Panel

  • 2x Mini-USB UART debugging port (connected to ARM CPU and FPGA I/O pins)
  • 2x cooling fan
  • 2x microswitch, power button
  • 1x grounding connector

Programmable resources

  • Xilinx Virtex-6 FPGA (LX240T FFG1156)
  • ARM Atmel AT91 SAM9G45 CPU – 400MHz

Clocking resources

  • 1x Low-Jitter Clock Generator (Synthesizer 28-683MHz TI CDCM61002, used as DMTD offset clock in WR Switch HDL)
  • 1x 25MHz VCXO, FRETHE025 controlled by DAC with SPI interface (AD5662 16bit 2.7-5.54V, used to drive CDCM61002 generator)
  • 1x 25MHz VCO controlled by DAC with SPI interface (AD5662 16bit 2.7-5.54V, used to drive AD9516 generator)
  • 1x 25MHz XO oscillator FNETHE025 (main FPGA clock)
  • PLL – 14 Output Clock Generator with Integrated 1.6 GHz VCO (AD9516, clock signals for Xilinx GTXs, µTCA connectors)
  • 1x Internal Oscillator (VM53S3-25.000, tuned to follow WR master clock or followed in Free Running mode)

Memory

  • 64MB DDR2
  • 256MB NAND
  • 8MB boot flash

Software

  • Linux – kernel v2.6.39
  • Timing – WRP daemon (node discovery, etc.) PTPv2 daemon

Switching

  • 1x protocols (multicasting, spanning tree, GMRP/-GARP)
  • VLAN Tagging
  • SNMP switch management

Other

  • Protocols: TCP/IP, SSH, SNMP, TFTP, DHCP, ARP, DNS
  • 1x FPGA JTAG connector
  • 1x ARM JTAG connector
  • 2x I2C multiplexer (PCA9548A)
  • 1x I2C GPIO driver (PCA9554PW, driving Power and Status LEDs on the front panel)
  • 9x I2C GPIO driver (PCA9554PW, driving LEDs for each SFP cage)
  • Power supply 100-240VAC, 2.0A, 50-60Hz input, 12VDC, 6.66A, 80W output

Application

The White Rabbit Switch is a central element of a White Rabbit network for ultra-precise time and event distribution and was designed as a part of the White Rabbit project at CERN. It can be used for sub-nanosecond time synchronization of control and measurement systems distributed over large (multi-km) distances.

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Support

We offer electronics engineering consultancy services, including: custom modifications of hardware, custom firmware and gateware modifications, system design, integration and testing.

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Please contact us concerning details of your order and any requirements you may have towards our equipment. All shipping details will be set up as well.

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