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To get ready for a receive operation
1. Enter the Timekeeping Mode (page E-24).
You could also enter the World Time Mode to perform this procedure.
Time calibration reception is based on the applicable mode's city setting. In the Timekeeping Mode,
the city setting is the Home City. In the World Time Mode, it is the World Time City (page E-28).
2. Place the watch in a location where signal reception is good.
12 o'clock
or
E-16
To perform manual receive
1. Enter the Timekeeping Mode (page E-24).
You could also enter the World Time Mode to perform this procedure.
Time calibration reception is based on the applicable mode's city setting (page E-13). In the
Timekeeping Mode, the city setting is the Home City. In the World Time Mode, it is the World Time
City (page E-28).
2. Hold down B for at least two seconds.
The 2 Second Hand will fi rst indicate A (a.m.) or P (p.m.), then move to
A (a.m.)
R (READY) to indicate that signal reception has started.
P (p.m.)
3. The 2 Second Hand indicates the operations the watch is currently
performing.
When the 2 2 Second Hand is
pointed here:
R (READY)
W (WORK)
If signal reception is unstable, the 2 2 Second Hand may move between
W (WORK) and R (READY).
The watch's time setting is adjusted automatically whenever a receive
operation is successful.
R (READY)
W (WORK)
E-18
To turn auto receive on and off
1. Enter the Timekeeping Mode (page E-24).
N (NO)
You could also enter the World Time Mode to perform this procedure.
Time calibration reception is based on the applicable mode's city setting
(page E-13). In the Timekeeping Mode, the city setting is the Home City. In
the World Time Mode, it is the World Time City (page E-28).
2. Press B.
The 2 Second Hand will fi rst indicate A (a.m.) or P (p.m.). Then it will
indicate the last reception result (Y or N) for about 10 seconds.
3. During the 10 seconds that the 2 Second Hand is pointing to the latest
receive operation result (see above), pull out the crown to the fi rst click.
This will cause the 2 Second Hand to point to either Y (YES) or N (NO),
which indicates the current on/off setting.
Y (YES)
Leaving the crown pulled out for more than two minutes without
performing any operation will automatically cause crown operations to
become disabled. If this happens, press the crown back in, pull it out,
and then start the operation over again.
4. Rotate the crown to move the 2 Second Hand to the setting you want.
To turn on auto receive, select Y (YES).
To turn off auto receive, select N (NO).
5. Push the crown back in to return to the mode you started from (Timekeeping or World Time) in step 1.
E-20
Mode Reference Guide
Your watch has three "modes". The mode you should select depends on what you want to do.
Pull out the crown to the fi rst click and then rotate it to navigate between modes.
In this mode:
You can do this:
View the current time in the Home City.
Use the upper dial and the 2 2 Second Hand to measure elapsed
time (1/20 (0.05)-second timing for up to 60 minutes (fi ve 12-minute
revolutions)).
View the current time in the World Time City in the lower dial.
Timekeeping
Confi gure Home City and summer time settings.
Perform calibration signal Auto Receive and Manual Receive.
Enable/disable Auto Receive.
Manually confi gure time and date settings
View the current time in the World Time City.
View the current time in the Home City in the upper dial.
Use the lower dial and the 2 2 Second Hand to measure elapsed
time (1/20 (0.05)-second timing for up to 60 minutes (fi ve 12-minute
revolutions)).
World Time
Confi gure World Time City and summer time settings.
Perform calibration signal Auto Receive and Manual Receive.
Enable/disable Auto Receive.
Manually confi gure time and date settings.
Measure elapsed time (1/20 (0.05)-second timing for 60 minutes).
Stopwatch
View the current time in the World Time City in the upper dial.
View the current time in the Home City in the lower dial.
E-22
Operation Guide 5347 (OC)
Position the watch as shown in the nearby illustration,
with 12 o'clock pointed towards a window. Make sure
there are no metal objects nearby.
Signal reception normally is better at night.
The receive operation takes from two to 10 minutes, but
in some cases it can take as long as 20 minutes. Take
care that you do not perform any button operation or
move the watch during this time.
It means this:
Watch is setting up for reception.
Reception is in progress.
More info:
Signal reception may be diffi cult or even impossible under the conditions described below.
Inside or among
Inside a vehicle
buildings
3. What you should do next depends on whether you are using Auto Receive or Manual Receive.
Auto Receive: Leave the watch over night in the location you selected in step 2.
Manual Receive: Perform the operation under "To perform manual receive" on page E-18.
Important!
With Auto Receive, the watch performs the receive operation each day automatically up to six times
(up to fi ve times for the Chinese calibration signal) between the hours of midnight and 5 a.m. When any
receive operation is successful, none of the other receive operations for that day are performed.
Calibration signal reception is disabled in the following cases.
−
In the Stopwatch Mode
−
While an elapsed time operation is in progress in the Timekeeping Mode or World Time Mode
−
While Auto Receive is turned off
While the crown is pulled out
−
−
While the battery charge is low
−
While the watch is in function sleep
Note
Correct indication will resume after the receive operation is complete. If you need to produce a correct
time reading immediately, press any button to stop the receive operation.
If reception fails for some reason, check the surrounding area and eliminate possible causes for failure
and then try again. See "To get ready for a receive operation" (page E-16).
To check the result of the latest receive operation
N (NO)
Y (YES)
Radio-controlled Atomic Timekeeping Precautions
Strong electrostatic charge can result in the wrong time setting.
Even if a receive operation is successful, certain conditions can cause the time setting to be off by up
to one second.
The watch is designed to update the date and day of the week automatically for the period from
January 1, 2000 to December 31, 2099. Updating of the date by signal reception will no longer be
performed starting from January 1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time with the precision
noted in "Specifi cations" (page E-49).
The receive operation is disabled under any of the following conditions.
−
While power is at Level 2 or Level 3 (page E-10)
−
While the watch is in the power recovery mode (page E-11)
−
While the watch is in the sleep state (power saving, page E-12)
Relationship between the Timekeeping Mode and World Time Mode
This section explains about the watch's Timekeeping Mode and World Time Mode, and the Home City
and World Time City.
Timekeeping Mode
The Timekeeping Mode is mainly used for viewing the current time in the Home
City.
World Time Mode
The World Time Mode is mainly used for viewing the current time in the World
Time City.
Home City
Specify the city where you normally will be using your watch. In Japan, the Home
E-24
E-37
City is Tokyo.
World Time City
Specify another city anywhere around the globe.
While the watch is in the Timekeeping Mode, time calibration signal reception is performed in
accordance with the Home City setting. When a time calibration signal is received and the time setting
is adjusted automatically while the watch is in the Timekeeping Mode, World Time Mode times are also
adjusted accordingly.
When the watch is in the World Time Mode, time calibration signal reception is performed based on
E-25
the World Time City time. When a time calibration signal is received and the time setting is adjusted
E-37
automatically while the watch is in the World Time Mode, other World Time Mode times are also
adjusted accordingly.
Adjusting the time setting manually while the watch is in the Timekeeping Mode will cause World Time
Mode times to be adjusted accordingly.
Adjusting the time setting manually while the watch is in the World Time Mode will cause Timekeeping
Mode times to be adjusted accordingly.
E-36
Near household
Near a
appliances,
construction
offi ce
site, airport, or
equipment, or a
other sources of
mobile phone
electrical noise
Important!
Perform the operation below in the same mode (Timekeeping Mode or
World Time Mode) where the latest receive operation was performed.
Changing to another mode will cause the latest receive information to be
cleared.
1. Press B.
The 2 Second Hand will fi rst indicate A (a.m.) or P (p.m.), and then move
to Y (YES) if the latest receive operation was successful, or N (NO) if it
was not.
2. After about ten seconds, regular timekeeping will resume. Before that, you
can press B to return manually to the mode you started from (Timekeeping
or World Time) in step 1.
Note
The 2 Second Hand will indicate N (NO) if you have exited the mode
(Timekeeping Mode or World Time Mode) where the receive operation was
performed, or if you have adjusted the time or date setting manually since
the latest receive operation.
Near high-
Among
tension power
or behind
lines
mountains
E-17
E-19
E-21
E-23
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