Project description
The Holdover Extension Board has been designed in the framework of the R&D 17IND14 WRITE project. This board has been developed for the White Rabbit Switch Low Jitter from Seven Solutions, aiming to characterize in terms of performance and costs the utilization of different oscillators as the main White Rabbit Local Oscillator.
PCB & Oscillator fingerprints
Figure 1: Holdover extension board PCB.
List of available fingerprints for the following oscillators:
- Oscilloquartz OCXO8663
- Morion MV341
- Morion MV216
- IQD IQOV-164
- Abracon AOCJY-10.0000MHZ
- Microsemi CSAC SA.45s
- Microsemi SA.3Xm
Firmware & User Guide
- WRS-LJ-HO firmware: (wr-switch-sw-lj-ho-v1.1-20200731-binaries.tar)
NOTE: The "official" wr-switch-sw firmware does not directly support this hardware. Unexpected behaviour might happen if you try to upload it.
Source Code
All source code including firmware, operating system in ARM and embedded software in LM32 can be downloaded from open source repository.
- FPGA Gateware (https://ohwr.org/project/wr-switch-hdl/tree/wrs-lj-ext-ho-WRITE)
- ARM software (https://ohwr.org/project/wr-switch-sw/tree/joselj-wrslj-write)
- lm32 firmware (https://ohwr.org/project/wrpc-sw/tree/wrs-lj-ext-ho-WRITE)
- Hardware (https://ohwr.org/project/wrs-lj-hw/)
- Schematics (BRD-WRITE-HO-01_SCH_V1_0.pdf)
Commercial producers
SevenSolutions
WR developer and producer company
Project information
Part of this work is funded by The 17IND14 WRITE project. This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.
Status
Date | Event |
---|---|
21-02-2019 | Start of project |
30-Jul-2020 | First firmware released wr-switch-sw-lj-ho-v1.1-20200731-binaries.tar |