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Auto GPS Signal Receive
When the conditions below are satisfied, the
watch will automatically receive a GPS signal.
If any time information receive is successful,
the watch will no longer attempt to receive a
signal for the rest of the day.
Time information
Watch is in the Timekeeping Mode (normal
timekeeping).
Current time is between 6:00 a.m. and 10:00
p.m.
Light (near a window on a clear day)
continually shining on the face of the watch
for about one to two minutes.
Time calibration signal reception was not
successful during the previous evening.
Note
The time information receive
operation takes anywhere from
about seven seconds to one minute.
The receive operation can take as
long as 13 minutes when leap
second information is included.
Leap Second Reception
GPS signal reception each year on June 1 or
later and on December 1 or later also receives
leap second information.
Note
It can take as long as 13 minutes to
complete the leap second
information receive operation.
The leap second information receive
operation is repeated until
information receipt is complete.
Once the leap second information
receive operation is complete, the
watch will not make any attempt to
receive it again until the following
June 1 or December 1.
Time Adjustment Using a
Time Calibration Signal
Appropriate Signal Reception
Location
A time calibration signal can be received while
the watch is near a window.
Keep metal objects away from the watch.
Do not move the watch.
Do not perform any operation on the watch.
12 o'clock
Note
You may experience time calibration
signal reception problems in the
areas described below.
Among or near buildings
While riding in a vehicle
Near household appliances,
office machines, mobile phones,
etc.
On a construction site, in an
airport, or any other location
where radio wave interference
occurs
Near high-voltage lines
In mountainous areas or behind a
mountain
Time Calibration Signal Reception
Ranges
Japan (JJY)
The Japan time signal radio stations are
located on Mt. Otakadoya in Fukushima and
Mt. Hagane in Fukuoka/Saga.
The reception range of the Japanese time
signals is approximately 1,000 km from each
transmission station.
China (BPC)
The China time signal radio station is located
in Shangqiu, Henan Province, China.
The reception range of the Chinese time
signal is approximately 1,500 km from the
transmission station.
United States (WWVB)
The United States time signal radio station is
located in Fort Collins, Colorado.
The reception range of the U.S. time signal is
approximately 3,000 km from the transmission
station.
U.K. (MSF)/Germany (DCF77)
The U.K. time signal radio station is located in
Anthorn, Cumbria.
The German time signal radio station is
located in Mainflingen, southeast of Frankfurt.
The reception range of the U.K. and German
time signals is approximately 1,500 km from
each transmission station.
Note
Even if you are within the normal
reception range of a time calibration
signal, reception may be made
impossible by the following factors:
geographic contours, weather, the
season, the time of day, wireless
noise.
Operation Guide 5411
5
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