White Rabbit Node SPEC A7

Operating Modes 

SPEC A7 is available in the following configurations: 

• Standalone unit in an aluminum enclosure with basic functionality (PPS, 10 MHz, and trigger outputs only) – cost-efficient version 

• Standalone unit in an aluminum enclosure with extended functionality (additional 10 MHz–6 GHz RF output, Grand Master capability) 

• Standalone unit in an aluminum enclosure with management interface (RJ45 and SFP; embedded Linux) 

• NIC card with PTM support, operating as a standard Linux Network Interface Controller (NIC) 

• Mezzanine for the Sinara reference clock card (Wenzel_ref) 

Module Features 

• Dual SFP; operating modes: WR node, WR Grand Master, WR switch 

• PPS and 10 MHz/TRIG outputs (default configuration) 

• PPS and 10 MHz inputs (extended configuration) 

• Programmable 10 MHz–6 GHz RF output 

• Low-jitter PPS and TRIG outputs — FPGA signal synchronized to the main VCXO, with fine tuning via an external delay line 

• Time of Day (ToD) IN/OUT via MMCX → SMA 

• Linux NIC with Precision Time Measurement (PTM) support over PCI Express 

• Firmware compatible with CUTE-A7 (full pin-to-pin compatibility), without NIC support 

• Dedicated LiteX-based firmware with NIC and PTM functionality 

• Power supply via PCI Express or DC jack (6–12 V DC) 

• Passive cooling 

• 64 Mbit PSRAM 

• USB-C interface providing access to JTAG, serial console, and I²C 

Management Mezzanine Features 

• Linux SOM (i.MX93) running services such as VPN, routing between WR and external RJ45/SFP interfaces, and SNMP 

• Management interfaces: RJ45 (10/100/1000) and SFP (100/1000) 

• Remote board management and monitoring 

Available Versions 

• NIC version 

• Standalone version with management module 

• Rack-mount version — four SPEC A7 units