                                  Attention

   NIST Radio Station WWVB will be conducting a test of a phase-modulated
   broadcast format beginning at 1800 UTC (12:00 noon MDT) Tuesday,
   September 4th and ending at 1800 UTC (12:00 noon MDT) on Thursday,
   September 6th,2012.  During the test period the broadcast will be
   randomly switching between the normal WWVB broadcast and the new
   phase-modulated broadcast format.

   Radio-controlled clocks and watches will not be affected by the test.
   Phase-locking 60 kHz timing and frequency standard receivers may lose
   lock during the test, but will restore during the normal broadcast
   period.  For more information, email WWVB broadcast manager John Lowe
   at [1]john.lowe@nist.gov, or call 303-497-5453.

References

   1. mailto:john.lowe@nist.gov
