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Calibration Signal Reception
Precautions
• Auto receive can be performed while the watch is in the
Timekeeping Mode or World Time Mode only.
• Signal reception is not possible when any one of the following
conditions exists.
• Timer operation in progress
• Low battery indicator ("LOW" or "CHG") on the display
• Recover indicator (RECOV) displayed
• Pressing any button while auto receive is in progress will
terminate it.
• Make sure you are within the range of the calibration signal
transmitter before performing the reception operation. Remember
that geographic contours, nearby buildings, the season, the time
of day, can make reception impossible even when you are within
range of the transmitter.
• Proper reception may be impossible if there is something blocking
the signal. If reception is unsuccessful, try again.
• This watch is designed to adjust its current time setting in
accordance with the calibration signal transmitted in Japan, the
United States, the U.K., or Germany. Note that you will need to
make your own adjustments when using this watch outside of the
range of the time calibration signal transmitters.
• When the watch is unable to adjust its time signal using the
calibration signal for some reason, timekeeping accuracy is within
±20 seconds per month.
• Strong electrostatic charge can cause timekeeping error.
• Signal reception is cancelled if an alert operation starts while it is
being performed.
• The watch's calendar shows dates up to the year 2099.
Attempting a receive operation after that causes an error.
• If you cannot receive the calibration signal or if the current time
setting is incorrect after signal reception, check the current setup
of the watch.
• The following are the watch's factory default settings, which are
configured automatically whenever you have the battery of the
watch replaced.
Auto Receive
On
Home City
Tokyo
Summer Time
Auto (according to signal data)
Operation Guide 3040
Troubleshooting
1. The watch cannot receive the time calibration signal.
• Is the signal being transmitted?
Though the time data of the Japanese calibration signal (Call
Sign: JJY) is maintained by the Japan Standard Time Group of
the National Institute of Information and Communications
Technology (NICT), it may sometimes be interrupted for periodic
maintenance work, or because of lightning or other problems.
• Are you within the reception range of a transmitter?
See "Reception Ranges" for information about areas where the
watch can receive the signal.
• Is there something in the immediate area that may be interfering
with reception?
Even if you are within the reception range of a transmitter, objects
between you and the transmitter or electrical noise can interfere
with reception. Avoid such areas (see "Location") during signal
reception.
• Do you have the correct Home City code selected?
Calibration signal reception will be impossible if you have any city
that is not included under "Reception Ranges" selected as your
Home City. For details about setting the correct Home City, see
"To configure Home City settings".
• Is auto receive turned off?
Use the procedure under "To turn auto receive on and off" to turn
on auto receive.
• Is a timer operation in progress?
Signal reception cannot be performed while a timer operation is in
progress. To stop a timer operation, enter the Timer Mode and
then press the D button.
• Is the watch in any mode other than the Timekeeping Mode or
World Time Mode during the auto receive times (midnight, 1:00
a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)?
Auto receive is performed only when the watch is in the
Timekeeping Mode or World Time Mode. It is not performed if the
watch is in any other mode.
2. Time calibration signal reception is successful, but the
hourly time signal and current time are slightly off.
• After the watch receives the time calibration signal, it performs an
internal decoding process before updating its time setting.
Because of this, the time setting may be slightly off (within one
second).
3. Time calibration signal reception is successful, but the
current time is one hour fast.
• Do you have summer time (DST) turned on? Use the procedure
under "To configure Home City settings" to change the summer
time setting to OFF or AUTO.
4. Time calibration signal reception is successful, but the
current time setting is wrong.
• Is TYO (Tokyo) selected for your Home City? For details about
setting the correct Home City, see "To configure Home City
settings".
Using Dual Time
Dual time lets you view the current time in your Home City and in
one more time zone (Secondary City) on the same screen. A
simple operation lets you make the current Secondary City your
Home City, and the current Home City your Secondary City.
• For details about setting the current time, see "To configure Home
City settings".
• Switching your Home City and Secondary City with each other will
switch both the city codes and current time settings. Depending
on the city codes, switching cities may also cause a change in the
time calibration signal transmitter setting. See "Reception Range"
for more information.
Secondary City Time
Home Time
Home Time
Home Time Screen
Dual Time Screen
5. I can't turn auto receive on and off
• You will not be able to turn auto receive on or off if you have any
city that is not included under "Reception Ranges" selected as
your Home City. For details about setting the correct Home City,
see "To configure Home City settings".
6. What time is auto receive performed?
• Auto receive is performed in the middle of the night, when
reception conditions are best. Before going to bed at night, place
the watch near a window, with 12 o'clock facing in the general
direction of the transmitter.
7. How can I perform manual receive?
• In the Receive Mode, hold down the D button (lower right) for
about two seconds. "RC" will appear on the display to indicate that
manual receive has started. Place the watch near a window, with
12 o'clock facing in the general direction of the transmitter.
8. How can I view the last reception date and time?
• Enter the Receive Mode. The display will alternate at two-second
intervals between the date and time of the last successful signal
reception.
Use the C
C
C
C
C button to enter the Timekeeping Mode as shown under
"Modes and Indicators".
❚ To switch Dual Time cities
Secondary City Time
In the Timekeeping Mode, hold
D button for about
D
D
down the D
D
three seconds until the watch
beeps and the Home City and
Secondary City times switch
positions on the display.
• The dual time screen will be on
the display after you switch Dual
Home Time
Time cities. Press the D button
to return to the Timekeeping
Mode.
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