
                                  ATTENTION

   NIST Radio Station WWVB will be conducting a test of a phase modulation
   scheme beginning at 1900 UTC, Tuesday, 24th April until 1900 UTC,
   Wednesday, 25 April 2012. Most WWVB-controlled clocks and watches will
   be not be affected. Laboratory quality phase-locked and phase-tracking
   receivers may lose lock on the WWVB signal during the test. Questions
   and concerns regarding the test may be directed to the Broadcast
   Manager John Lowe, [1]lowe@nist.gov, or 303-497-5453.

References

   1. mailto:lowe@nist.gov
