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Operation Guide 3147
2
3. 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 or you can set the time manually.
• 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 “Important!” under “Time Calibration Signal Reception”
and “Transmitters”.
• See the maps under “Approximate Reception Ranges” 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” for more information.
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. 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 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.
Home City Code
LON, PAR, BER, ATH
HKG
TPE, TYO
HNL*, ANC*, LAX,
DEN, CHI, NYC
Frequency
60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Anthorn (England)
Mainflingen (Germany)
Shangqiu City (China)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(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.
Approximate Reception Ranges
Anthorn
Mainflingen
1,500 kilometers
500 kilometers
Fort
Collins
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
The Anthorn
signal is
receivable within
this area.
1,000
kilometers
1,000
kilometers
Fukuoka/Saga
500
kilometers
Fukushima
500
kilometers
500 kilometers
Changchun
Beijing
1,500 kilometers
Shangqiu
Shanghai
Hong Kong
Chengdu
Signals are receivable in the Taiwan area when reception conditions are good.
• 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)
Shangqiu (China) transmitter: 1500 kilometers (910 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.
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 Standard Time
1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight*
Daylight Saving Time
2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am
*
PAR Standard Time
2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am
*
BER
Daylight Saving Time
3:00 am 4:00 am 5:00 am Midnight* 1:00 am
*
2:00 am
*
ATH Standard Time
3:00 am 4:00 am 5:00 am Midnight* 1:00 am
*
2:00 am
*
Daylight Saving Time
4:00 am 5:00 am Midnight* 1:00 am
*
2:00 am
*
3:00 am
*
HKG Standard Time
1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
TYO Standard Time
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
TPE
NYC Standard Time and
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
CHI
Daylight Saving Time
DEN
LAX
*Next day