WT-961A WWVB—RADIO CONTROLLED WATCH
ABOUT WWVB (Radio Controlled Time)
The NIST (National Institute of Standards and Technology—Time and Frequency
Division) WWVB radio station is located in Ft. Collins, Colorado, and transmits the
exact time signal continuously at 60 kHz. The signal can be received up to 2,000
miles away through the internal antenna in the La Crosse Technology watch.
However, due to the nature of the Earth’s Ionosphere, reception is very limited during
daylight hours. The Watch will search for a signal every night when reception is best.
The WWVB radio station derives its signal from the NIST Atomic clock in Ft. Collins,
Colorado. A team of atomic physicists is continually measuring every second, of
every day, to an accuracy of ten billionths of a second per day. These physicists have
created an international standard, measuring a second as 9,192,631,770 vibrations of a
Cesium-133 atom in a vacuum. This watch is regulated by the WWVB transmitter.
For more information on WWVB and the NIST Atomic clock please visit their website
at http://www.boulder.nist.gov/timefreq/stations/wwvb.htm
SET-UP GUIDE, FEATURES, AND OPERATION
TIME LCD
TIME ZONE key
SET-UP
Your new radio-controlled watch may arrive to you already set. The default (factory)
setting is Eastern Time zone, Daylight Saving Time On and 12-hour time format. You
can tell if your watch has received the WWVB signal by looking for a tower icon in
the upper right corner of the LCD display. If the tower icon is solid your watch has
received the signal and set the time and date. If you need to set your watch to any
other setting than the default or need to manually activate the WWVB search (only do
so if there is no tower icon in the upper right of the LCD) please follow the directions
that follow.
NOTES:
•
Do not press the TIME ZONE button while the watch is searching for the
WWVB signal, which normally takes 6-10 minutes.
•
If you are unable to receive the WWVB signal during the daytime please
manually activate the WWVB search (see section II).
•
The optimal time for WWVB reception is between midnight and 6:00 a.m.,
reception may not occur until this time period.
•
When the WWVB search is complete the time and date will automatically be
displayed in the LCD.
•
If the watch is not within range of WWVB signals for an extended period of time
it will still continue to operate as a accurate quartz controlled watch.
I.
TIME ZONE SELECTION
The default time zone is Eastern Time (EST, also GMT-5). There are 25 Time Zones
to choose from. The selection will cycle from GMT-5 (EST) to GMT-12, then
GMT+12 to GMT +1, then GMT, then GMT-1 to GMT –5 (EST).
1.
Hold down the TIME ZONE button for 2 seconds or until a time zone
abbreviation and “ZONE” flash in the LCD.
2.
Repeatedly press and release the TIME ZONE button until the
appropriate Time Zone is displayed.
3.
Wait 8 seconds for the automatic time-out to exit the time zone
selection mode.
“Hawaii Time displayed
(GMT-10)
Atlantic Time (ATL):
GMT-4
Alaska Time (ALA): GMT-9
Eastern Time (EST):
GMT-5
Hawaii Time (HAW): GMT-10
Central Time (CST):
GMT-6
Mountain Time (MST): GMT-7
Pacific Time (PST):
GMT-8
Greenwich Mean Time (GMT): GMT