User Manual
Operation Guide 5423
E-29
Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.
To determine the watch’s current mode
Check the position of the
n
Right Dial Hand as shown
under “To select a mode” (page E-30).
To return to the Timekeeping Mode from any other
mode
Hold down C at least two seconds to enter the
Timekeeping Mode.
30
n
E-28
Mode Reference Guide
Your watch has three “modes”. The mode you should select depends on what you
want to do.
To do this: Enter this mode: See:
x View the current time in your Home City and in one
of 29 other cities around the globe
x View the current date in the Home City
x Confi gure Home City and daylight saving time
(DST) settings
x Perform a time calibration receive operation
x Confi gure time and date settings manually
Timekeeping Mode
E-31
Use the stopwatch to measure elapsed time Stopwatch Mode E-43
View the current time in one of 29 cities (time zones)
around the globe
World Time Mode E-46
E-27
Radio-controlled Atomic Timekeeping Precautions
x Strong electrostatic charge can result in the wrong time setting.
x Even if a receive operation is successful, certain conditions can cause the time
setting to be off by up to one second.
x The watch is designed to update the date and day of the week automatically for
the period January 1, 2000 to December 31, 2099. Updating of the date by signal
reception will no longer be performed starting from January 1, 2100.
x 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-69).
x The receive operation is disabled under any of the following conditions.
− While power is at Level 2 or lower (page E-11)
− When the watch is in the function sleep state (Power Saving, page E-14)
E-26
To check the result of the latest receive operation
In the Timekeeping Mode, press A.
x The
x
Second Hand will move to Y (YES) for fi ve
seconds if the latest receive operation was successful,
or N (NO) if it was not. After that, regular timekeeping
will resume.
x You can return to the Timekeeping Mode manually by
pressing A while the
x
Second Hand is pointing to
Y (YES) or N (NO).
Note
x The
x
Second Hand will indicate N (NO) if you have
adjusted the time or date setting manually since the
latest receive operation.
30
x
E-25
3. The receive operation is complete when the
x
Second
Hand moves to Y (YES) or N (NO) for about fi ve
seconds, and then resumes regular timekeeping.
x You can return to the Timekeeping Mode manually by
pressing A while the
x
Second Hand is pointing to
Y (YES) or N (NO).
x When the receive operation is successful, the watch
adjusts the time setting accordingly. It does not adjust
the setting if the operation failed.
Note
x To interrupt a receive operation and return to the
Timekeeping Mode, press any button.
30
x
E-24
To perform manual receive
1. In the Timekeeping Mode, keep A depressed (for about two seconds) as the
x
Second Hand goes through the following sequence.
x Moves to Y (or YES for some models) or N (NO) to indicate the last signal
reception result, then to R (READY).
2. The
x
Second Hand indicates the operations the watch is currently performing.
When the x
x
Second
Hand is pointed here:
It means this:
R (READY) Watch is setting up for reception.
W (WORK) Reception is in progress.
Y (YES)
Reception was completed
successfully.
N (NO) Reception failed for some reason.
x If signal reception is unstable, the x
x
Second Hand
may move between W (WORK) and R (READY).
30
x
E-23
3. What you should do next depends on whether you are using Auto Receive or
Manual Receive.
x Auto Receive: Leave the watch over night in the location you selected in step 2.
See “Auto Receive” on page E-23 for details.
x Manual Receive: Perform the operation under “To perform manual receive” on
page E-24.
Auto Receive
x 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. (according to the Timekeeping Mode
time). When any receive operation is successful, none of the other receive
operations for that day are performed.
x When a calibration time is reached, the watch will perform the receive operation
only if it is in the Timekeeping Mode or World Time Mode. The receive operation is
not performed if a calibration time is reached while you are confi
guring settings.
E-22
x The receive operation takes from two to seven minutes, but in some cases it
can take as long as 14 minutes. Take care that you do not perform any button
operation or move the watch during this time.
x Signal reception may be diffi cult or even impossible under the conditions
described below.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
offi ce
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near
high-tension
power lines
Among
or behind
mountains
E-21
x Using this watch in a country covered by a time calibration that is different from the
countries it supports may result in incorrect time indication due to local application
of summer time, etc.
To get ready for a receive operation
1. Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down C for
about two seconds to enter the Timekeeping Mode.
2. Place the watch in a location where signal reception is good.
x Position the watch as shown in the
nearby illustration, with 6 o’clock
pointed towards a window. Make
sure there are no metal objects
nearby.
x Signal reception normally is better
at night.
6 o’clock
or
E-20
x Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference may also cause problems with
reception.
− Mainfl ingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310
miles)
− Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
− Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
− Shangqiu (China) transmitter: 500 kilometers (310 miles)
x As of December 2013, China does not use Daylight Saving Time (DST). If China
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.