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Operation Guide 4709 4713
2
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.
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
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 Time Zone 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 Time Zone
UTC +0
UTC +1
UTC +2
UTC +8
UTC +9
UTC –10
UTC –9
UTC –8
UTC –7
UTC –6
UTC –5
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 Time Zones and Transmitters
Approximate Reception Ranges
U.K. and German Signals
Fort Collins
600 miles
(1,000 kilometers)
Fukuoka/Saga
500 kilometers
Fukushima
500 kilometers
U.S. Signal
Japan Signals
2,000 miles
(3,000 kilometers)
1,000 kilometers
1,000 kilometers
Anthorn
1,500 kilometers
The Anthorn signal
is receivable within
this area.
500 kilometers
Mainflingen
• 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.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
Your Home Time Zone Auto Receive Start Times
123456
UTC +0
(DST ON : UTC +1)
UTC +1
(DST ON : UTC +2)
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 Time Zone, and whether standard time or Daylight Saving Time is
selected for your Home Time Zone.
UTC +2
(DST ON : UTC +3)
UTC +8
UTC +9
UTC –10 (DST ON : UTC –9)
UTC – 9 (DST ON : UTC –8)
UTC – 8 (DST ON : UTC –7)
UTC – 7 (DST ON : UTC –6)
UTC – 6 (DST ON : UTC –5)
UTC – 5 (DST ON : UTC –4)
Standard Time
Daylight Saving
Time
Standard Time
Standard Time
Daylight Saving
Time
3:00 am
4:00 am
Midnight
Midnight
4:00 am
5:00 am
1:00 am
1:00 am
5:00 am
Midnight
next day
2:00 am
2:00 am
Midnight
next day
1:00 am
next day
3:00 am
3:00 am
1:00 am
next day
2:00 am
next day
4:00 am
4:00 am
2:00 am
next day
3:00 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 Dual 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 two to 14 minutes everyday when the
time in the Timekeeping Mode reaches each of the calibration times. Avoid
performing any button operation within five 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
During signal reception, 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)
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.
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Transmitter Indicator
During signal reception, an indicator of the transmitter
whose signal the watch is attempting to receive will flash.
After signal reception is complete, the indicator of the
transmitter from which the signal was received will remain
on, without flashing.
• The following shows the meaning of each of the
transmitter indicator names.
JP40: Fukushima (Japan)
JP60: Fukuoka/Saga (Japan)
US60: Fort Collins, Colorado (the United States)
GE77.5: Mainflingen (Germany)
UK60: Anthorn (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 Time Zone.
To perform manual receive
1.Enter the Timekeeping Mode or display the last signal
screen.
2.
Place the watch on a stable surface so its 12 o’clock side
is facing towards a window.
3.
Hold down C for about two seconds until the watch beeps.
4.
After you release C the display will show the letters RC.
This indicates that signal reception is in progress.
• The indicator of the transmitter whose signal the watch
is attempting to receive will flash.
• Time calibration signal reception takes from two to
14 minutes. Take care that you do not press C or move
the watch during this time.
• If the receive operation is successful, the reception date
and time appear on the display. The indicator of the
transmitter whose signal the watch received will also be
indicated.
The watch will enter the Timekeeping Mode if you press
C or if you do not perform any button operation for
about one or two minutes.
Transmitter indicator
Receiving
Receive successful
Receive date
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▲
▲
▲
• If the current reception fails, the display shows the ERR
indicator.
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 one or two
minutes.
Receive failed