Archive for January 11th, 2010

WWVB Time Code Format Diagram

This is by-and-large the same diagram of the WWVB Time Code Format that you’ll find there, but with:

  • the PR frame reference pulse identified
  • the last four bits clearly labeled
  • some verbiage chopped out
WWVB Time Code Format - with PR marker

WWVB Time Code Format - with PR marker

Memo to Self: Remember that…

  • The time code applies to the minute that’s currently happening, so …
  • The PR pulse happens before the rest of the time code arrives
  • You must know the end-of-month date to apply the leap second bit, but EOM isn’t part of the data stream

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