Project:Time Source

Project to build a high-accuracy GPS-disciplined time/frequency source by linking a GPS receiver to a high-precision Lucent frequency standard based on an oven-controlled crystal oscillator.

Status

The GPS receiver is currently connected to the radio shack computer (radioshack.dhcp.lan.london.hackspace.org.uk) and ntpd is synced to the PPS time signal as a stratum 1 server. (16/09/2015)

Why?

• Very high-accuracy 10MHz and 15MHz frequency standards (good for calibrating radios)
• Unreasonably high precision NTP server
• High-precision time sources are cool

Components

• Active GPS antenna on the roof of the radio shack
• TimeTools T1000/2 GPS receiver
• Lucent/Symmetricom KS-24361 REF-0 reference clock
• Arduino to deal with interface logic
• Raspberry Pi to act as an NTP server (PPS signal via GPIO)

References

• https://www.febo.com/pipermail/time-nuts/2015-August/093346.html
• http://syncchannel.blogspot.co.uk/2015/08/standalone-operation-of-lucent-ks-24361.html
• http://syncchannel.blogspot.co.uk/2015/08/prototyping-gps-board-for-ks-24361-ref-0.html