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Operation Guide 3019 3039
2
• 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 one to seven minutes, but in some
cases it can take as long as 13 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
household
appliances,
office
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
• 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
LIS, LON,
MAD, PAR, ROM, BER,
STO, ATH, MOW*
HKG*, BJS*, TPE,
SEL, TYO
HNL*, ANC*, YVR,
LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO,
NYC,YHZ, YYT
Frequency
60.0 kHz
77.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Rugby (England)
Mainflingen (Germany)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Home City Codes and Transmitters
* The areas covered by the MOW, HKG, BJS, 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
Rugby
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 Rugby (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.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
Your Home City Auto Receive Start Times
123456
LIS, LON
MAD, PAR, ROM,
BER, STO
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
1:00 am
2:00 am
2:00 am
3:00 am
2:00 am
3:00 am
3:00 am
4:00 am
3:00 am
4:00 am
4:00 am
5:00 am
4:00 am
5:00 am
5:00 am
Midnight
next day
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
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.
ATH
MOW
HKG, BJS, TPE,
SEL, TYO
HNL, ANC, YVR,
LAX, YEA, DEN,
MEX, YWG, CHI,
MIA, YTO, NYC,
YHZ, YYT
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Standard Time
Daylight
Saving Time
3:00 am
4:00 am
4:00 am
5:00 am
Midnight
Midnight
4:00 am
5:00 am
5:00 am
Midnight
next day
1:00 am
1:00 am
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
2:00 am
2:00 am
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
3:00 am
3:00 am
1:00 am
next day
2:00 am
next day
2:00 am
next day
3:00 am
next day
4:00 am
4:00 am
2:00 am
next day
3:00 am
next day
3:00 am
next day
4:00 am
next day
5:00 am
5:00 am
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 receive 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 one to seven minutes everyday when
the time in the Timekeeping Mode reaches each of the calibration times. Avoid
performing any button operation within seven 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. The receive operation will be performed whenever the display
shows any one of the calibration times, regardless of whether or not the displayed
time actually is the correct time.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Weak
(Level 0)
Strong
(Level 3)
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Receiving indicator
• Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
Transmitter Indicator
The watch has transmitter names along the bottom of the
display. The transmitter indicator flashes during signal
reception above the name of the transmitter from which
the watch is currently receiving a signal. After signal
reception is complete, the indicator will remain, without
flashing, above the name of the transmitter from which
the signal was received.
• The following shows the meaning of each of the
transmitter names along the bottom of the display.
JP40: Fukushima (Japan)
JP60: Fukuoka/Saga (Japan)
US60: Fort Collins, Colorado (the United States)
GE77.5: Mainflingen (Germany)
UK60: Rugby (England)
• The transmitter indicator turns off automatically at the start of the first auto receive
operation of a new day. The time of the first auto receive operation of a new day
depends on your currently selected Home City.
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Transmitter indicator
To perform manual receive
1.Enter the Receive Mode.
2.Place the watch on a stable surface so its 12 o'clock
side is facing towards a window.
3.Hold down D for about two seconds until RC appears
on the display.
• The transmitter indicator flashes above the name of the
transmitter whose signal the watch is attempting to
receive.
• Time calibration signal reception takes from one to
seven minutes. Take care that you do not perform any
button operations or move the watch during this time.
• If the receive operation is successful, the reception date
and time appear on the display, along with the GET
indicator.
The watch will enter the Timekeeping Mode if you press
C or if you do not perform any button operation for
about two or three minutes.
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Transmitter indicator
Receiving
Receive successful
▲
▼
Receive
date
Receive
time
• If the current reception fails but a previous reception was
successful, the display shows the previous reception’s
date and time, and the ERR indicator.
- : - - indicates that none of the reception operations
were successful.
The watch will enter the Timekeeping Mode without
changing the time setting if you press C or if you do not
perform any button operation for about two or three
minutes.
Receive failed
To turn auto receive on and off
1.Enter the Receive Mode.
2.In the Receive Mode, press A so the current auto
receive setting (on or OFF) is flashing. This is the
setting screen.
• Note that the setting screen will not appear if the
currently selected Home City is one that does not
support time calibration reception.
3. Press D to toggle auto receive on (on) and off (OFF).
4.Press A to exit the setting screen.
• For information about city codes that support signal
receive, see “To specify your Home City”.
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On/Off status
▲
▼
Receive date
Receive time
To check the latest signal reception results
Enter the Receive Mode.
• When receive is successful, the display shows the time
and date that receive was successful. - : - - indicates
that none of the reception operations were successful.
• To return to the Timekeeping Mode, press C.