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Operation Guide 5161
Switching the Display Screen
In the Timekeeping Mode, each press of C changes the contents of the digital
display.
Date Screen
Day
Receiving
Press C.
Indicator and
Seconds Count
Day of week
Current Time
C
Screen
E-10
• The U.S. time calibration signal can be picked up by the watch while in North
America. The term "North America" in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
• As of March 2010, 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.
• 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 specify your Home City
1. In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after "ADJ"
appears on the display.
• At this time, "12H" (12-hour timekeeping) or "24H" (24-
hour timekeeping) also will be flashing on the display.
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4. Press A to exit the setting screen.
• Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive
operation (in the middle of the night). You also can perform manual receive (page
E-25) or you can set the time manually (page E-54).
• The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see page
E-18 and "Transmitters" (page E-72).
• See the maps under "Approximate Reception Ranges" (page E-19) for information
about the reception ranges of the watch.
• You can disable time signal reception, if you want. See "To turn auto receive on and
off" on page E-27 for more information.
• Under factory default settings, auto receive is turned off for all of the following city
codes: HNL (Honolulu) and ANC (Anchorage). For details about turning on auto
receive for these city codes, see "To turn auto receive on and off" on page E-27.
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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 pointing 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.
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• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Home City Code
Transmitter
Anthorn (England)
LON, PAR, ATH
Mainflingen (Germany)
HKG
Shangqiu City (China)
Fukushima (Japan)
TYO
Fukuoka/Saga (Japan)
HNL*, ANC*, LAX,
Fort Collins, Colorado
DEN, CHI, NYC
(the United States)
* The areas covered by the HNL and ANC city codes are quite far from the time
calibration signal transmitters, and so certain conditions may cause problems with
signal reception.
• Calibration signal reception is disabled while a countdown timer operation is in
progress.
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Receiving indicator
Appears when reception
is successful.
Seconds
C
PM indicator
Hour : Minutes
12 o'clock
or
Frequency
60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly.
• This watch is designed to pick up the time calibration signals transmitted in Germany
(Mainflingen), England (Anthorn), the United States (Fort Collins), China (Shangqiu),
and Japan (Fukushima, Fukuoka/Saga).
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration
signal. You also can perform a manual procedure to set the time and date, when
necessary.
• The first thing you should do after purchasing this watch is to specify your
Home City (the city where you normally will use the watch). For more
information, see "To specify your Home City" (page E-12).
• When using the watch outside the areas covered by the time signal transmitters, you
will have to adjust the current time setting manually as required. See "Timekeeping"
(page E-53) for more information about manual time settings.
2. Press B.
• The city code of the current Home City will flash,
which indicates the setting screen.
3. Press C (east) to select the city code you want to use
as your Home City.
LON : London
PAR : Paris
City code
ATH : Athens
HKG : Hong Kong
TYO : Tokyo
HNL : Honolulu
ANC : Anchorage
LAX : Los Angeles
DEN : Denver
CHI : Chicago
NYC : New York
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
6 times a day (5 times a day for the Chinese calibration signal). When any auto
receive is successful, the remaining auto receive operations are not performed. For
more information, see "About Auto Receive" (page E-22).
• 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" (page E-25).
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
Inside a
Near
vehicle
household
among
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 three to eight minutes, but in some
cases it can take as long as 16 minutes. Take care that you do not perform any
button operations or move the watch during this time.
Approximate Reception Ranges
U.K. and German Signals
1,500 kilometers
Anthorn
500 kilometers
The Anthorn signal
is receivable within
this area.
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E-13
E-15
Near a
Near high-
Among or
tension power
behind
construction
site, airport,
lines
mountains
or other
sources of
electrical
noise
E-17
Mainflingen
U.S. Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
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