You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
forksand c3a7626361
Notes, BoM updates/re-org
4 years ago
..
README.md Notes, BoM updates/re-org 4 years ago

README.md

Cubo Libre Clock

Time source will come from Internet NTP and external GPS antenna for confirmation. Other external time sources will be considered.

Precision Time Protocol (PTP)

Use precision time protocol within the cluster.

  • Mellanox SN2100 / SN2700 (Spectrum silicon) switches with MLNX-OS/ONYX (in GA since 3.6.5011) for PTP IEEE-1588 (SMPTE ST2059-2 profile)[41] or with Cumulus Linux (from version 3.6) with the ptp4l Linux package.[42]

Network Time Protocol (NTP)

Network Time Protocol is used for time sync from the Internet.

  • Run time server on cluster firewall.

GPS

  • External GPS with serial connection to cluster firewall.

WWVB

BPSK new signal on WWVB since 2012 (?) http://everset-tech.com/signal/ http://everset-tech.com/wp-content/uploads/2014/11/CMOSBPSKReceiver.pdf

CDMA

ACTS

  • The NIST transmits in its own standard Automated Computer Timer Service (ACTS). It is contacted via TCP/IP on port 13

Misc