Filter
Top Products
Operation Guide 4749
2
• Even if the time calibration signal is received correctly, there are some times when
the analog hands may not indicate the correct time. If this happens, use the
procedures under “Adjusting the Home Positions” to check the home positions of the
hands, and make adjustments as required.
• You can also change the Home City setting by swapping the current Home City and
the currently selected World Time City. For details, see “Swapping your Home City
and World Time City”.
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
The time calibration signals transmitted from Mainflingen (Germany), Anthorn
(England), or Fort Collins (the United States) include both Standard Time and DST
data. When the Auto DST setting is turned on, the watch switches between Standard
Time and DST (summer time) automatically in accordance with the signals.
• Though the time calibration signal transmitted by the Fukushima and Fukuoka/Saga,
Japan transmitters include summer time data, summer time currently is not
implemented in Japan (as of 2006).
• The default DST setting is Auto DST (AUTO/AT) whenever you select LON, PAR,
ATH, ANC, LAX, DEN, CHI, NYC, or TYO as your Home City code.
• If you experience problems receiving the time calibration signal in your area, it
probably is best to switch between Standard Time and Daylight Saving Time
(summer time) manually. For more information, see “To set the time and date
manually”.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to six
times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
• Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.
Important!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
12 o’clock
or
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
• Signal reception normally is better at night than during the day.
• Time calibration signal reception 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 operations or move the watch during this time.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
Near
household
appliances,
office
equipment,
or a mobile
phone
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below. If you use the watch in Japan or Europe
(each of which has two different transmitter locations), it will try to receive the time
calibration signal from one of the transmitters in your current location. If it cannot
receive the signal, it will then try to receive the time calibration signal from the other
transmitter.
Home City Code
LON, PAR, ATH
HKG*, TYO
HNL*, ANC*, LAX,
DEN, CHI, NYC
Frequency
60.0 kHz
77.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Anthorn (England)
Mainflingen (Germany)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Home City Codes and Transmitters
* The areas covered by the HKG, HNL, and ANC city codes are quite far from the
time calibration signal transmitters, and so certain conditions may cause problems
with signal reception.
Reception Ranges
Anthorn
Mainflingen
500 kilometers
Fort Collins
600 miles
(1,000 kilometers)
Fukuoka/Saga
500 kilometers
Fukushima
500 kilometers
U.K. and German Signals
U.S. Signal
Japan Signal
1,500 kilometers
2,000 miles
(3,000 kilometers)
1,000 kilometers
1,000 kilometers
• 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.
Mainflingen (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)
• Even when the watch is within the reception range of the transmitter, signal
reception will be impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
• Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day.
When any auto receive is successful, the remaining auto receive operations are not
performed. The reception schedule (calibration times) depends on your currently
selected Home City, and whether standard time or Daylight Saving Time is selected
for your Home City.
Your Home City Auto Receive Start Times
123456
LON
PAR
ATH
HKG, TYO
HNL, ANC, LAX,
DEN, CHI, NYC
Standard Time
Daylight Saving
Time
Standard Time
Daylight Saving
Time
Standard Time
Daylight Saving
Time
Standard Time
Standard Time
Daylight Saving
Time
1:00 am
2:00 am
2:00 am
3:00 am
3:00 am
4:00 am
Midnight
Midnight
2:00 am
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
1:00 am
1:00 am
3:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight
next day
2:00 am
2:00 am
4:00 am
5:00 am
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
3:00 am
3:00 am
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
4:00 am
4:00 am
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
2:00 am
next day
3:00 am
next day
5:00 am
5:00 am
Note
• Auto receive is supported in all modes except while a stopwatch elapsed time
operation is in progress.
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can receive the signal easily.
• The watch receives the calibration signal for two to 14 minutes everyday when the
time in the Timekeeping Mode reaches each of the calibration times. Do not perform
any button operation within 14 minutes before or after any one of the calibration
times. Doing so can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode.
• Signal receive is cancelled if an alarm operation starts while it is being performed.
To perform manual receive
1.Place the watch on a stable surface so its 12 o’clock
side is facing towards a window.
2.In the Timekeeping Mode, hold down A for about two
seconds until the watch beeps.
3.The stopwatch second hand will move to READY (R) to
indicate that the watch is setting up for time calibration
reception.
• The stopwatch second hand will move to WORK (W)
and stay there while actual reception is in progress.
• The hour, minute, and 24-hour hands all continue to
keep time normally.
• The second hand will stop at “0”.
*
*
Some models show “60” instead of “0”.
• Time calibration signal reception takes from two to
seven minutes, but in some cases it can take up to 14
minutes. Take care that you do not perform any button
operations or move the watch during this time.
3
0
3
0
WORK
READY
Y(YES)
N(NO)
• After signal reception is successful, the watch adjusts its hour, minute, 24-hour
hand, and second hand settings, and then returns to the Timekeeping Mode. Next,
the stopwatch second hand moves to Y (YES) momentarily to indicate that signal
reception was successful. After about five seconds, the stopwatch second hand
moves to 12 o’clock.
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If signal reception fails for some reason, the watch returns to normal timekeeping
without making any adjustments. Next, the stopwatch second hand moves to N (NO)
momentarily to indicate that signal reception failed. After about five seconds, the
stopwatch second hand moves to 12 o’clock.
• If the stopwatch second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing any button.