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Operation Guide 5031
Approximate Reception Ranges
U.K. and German Signals
1,500 kilometers
Mainflingen
Anthorn
500 kilometers
The Anthorn signal is
receivable within this
area.
Japan Signals
500 kilometers
Fukuoka/Saga
1,000 kilometers
China Signal
1,500 kilometers
500 kilometers
Chengdu
Shangqiu
• Signal reception may not be possible up to 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)
Shangqiu (China) transmitter: 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.
• See the information under "Signal Reception Troubleshooting" if you experience
problems with time calibration signal reception.
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 watch will adjust the DST setting automatically when it receives a time
calibration signal while any one of the following city codes is selected as the Home
City.
LON, PAR, ATH, TYO, ANC, LAX, DEN, CHI, NYC
• The watch will not adjust the DST setting automatically while either of following city
codes is selected as the Home City. In this case, you will need to change between
standard time and daylight saving time manually.
HKG, HNL
• For information about the DST setting, see "To set your Home City time".
• As of June 2008, 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.
• 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 "Home City and DST".
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 (five times for the China signal). 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.
This watch is designed to receive a time calibration signal late at night. Because of
this, you should place the watch near a window as shown in the illustration when you
take it off at night. Make sure there are no metal objects nearby.
• Make sure the watch is facing the right way.
U.S. Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
500 kilometers
Fukushima
1,000 kilometers
Changchun
Beijing
Shanghai
Hong Kong
12 o'clock
or
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
Inside a
Near
among
vehicle
household
buildings
appliances,
office
equipment,
or a mobile
phone
• 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.
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day (five
times for the China signal). 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
1
2
LON
Standard Time
1:00 am
2:00 am
Daylight
2:00 am
3:00 am
Saving Time
PAR
Standard Time
2:00 am
3:00 am
Daylight
3:00 am
4:00 am
Saving Time
ATH
Standard Time
3:00 am
4:00 am
Daylight
4:00 am
5:00 am
Saving Time
TYO
Standard Time
Midnight
1:00 am
HKG
Standard Time
1:00 am
2:00 am
HNL, ANC,
Standard Time
LAX, DEN,
Daylight
Midnight
1:00 am
CHI, NYC
Saving Time
Note
• When a calibration time is reached, the watch will receive the calibration signal only
if it is in either the Timekeeping Mode or World Time Mode. Reception is not
performed if a calibration time is reached while you are configuring settings.
• 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.
• Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode.
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.
3. The second hand will move to READY (R) to indicate
that the watch is setting up for time calibration
reception.
• The second hand will move to WORK (W) and stay there
while actual reception is in progress.
• If signal reception is unstable during reception, the
WORK (W)
second hand may move between WORK (W) and
READY (R).
READY (R)
• The hour and minute hands continue to keep time
normally.
• If reception is successful, the second hand will move to
YES (Y), and the date and time settings will be adjusted
accordingly. Normal timekeeping will resume after that.
YES (Y)
NO (N)
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If reception is not successful, the second hand will move to NO (N). Five seconds
later, the second hand will resume normal operation, without any adjustment of the
hand setting.
• If the second hand is pointing to YES (Y) or NO (N), you can return to the Timekeeping
Mode by pressing A.
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive
operation was successful.
To check the latest signal reception results
In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal
receive operation since midnight, the second hand will
move to YES (Y). If the watch has been unable to
receive any signal successfully, the second hand will
move to NO (N).
• The watch will return to the Timekeeping Mode after five
seconds or when you press A.
• The current receive result is cleared when the first auto
receive operation is performed on the following day. This
NO (N)
means YES (Y) indicates successful signal reception
since the start of the current day.
YES (Y)
• If you adjust the time or date setting manually, the
second hand will move to NO (N).
Near a
Near high-
Among or
construction
tension power
behind
mountains
site, airport,
lines
or other
sources of
electrical
noise
3
4
5
6
3:00 am
4:00 am
5:00 am
Midnight*
4:00 am
5:00 am
Midnight*
1:00 am*
4:00 am
5:00 am
Midnight*
1:00 am*
5:00 am
Midnight*
1:00 am*
2:00 am*
5:00 am
Midnight*
1:00 am*
2:00 am*
Midnight*
1:00 am*
2:00 am*
3:00 am*
2:00 am
3:00 am
4:00 am
5:00 am
3:00 am
4:00 am
5:00 am
2:00 am
3:00 am
4:00 am
5:00 am
* Next day
2
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