Operation Guide 4749
•Even if the time calibration signal is received correctly, there are some times when the analog hands may not indicate the correct time. If this happens, use the procedures under “Adjusting the Home Positions” to check the home positions of the hands, and make adjustments as required.
•You can also change the Home City setting by swapping the current Home City and the currently selected World Time City. For details, see “Swapping your Home City and World Time City”.
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 time calibration signals transmitted from Mainflingen (Germany), Anthorn (England), or Fort Collins (the United States) include both Standard Time and DST data. When the Auto DST setting is turned on, the watch switches between Standard Time and DST (summer time) automatically in accordance with the signals.
•Though the time calibration signal transmitted by the Fukushima and Fukuoka/Saga, Japan transmitters include summer time data, summer time currently is not implemented in Japan (as of 2006).
•The default DST setting is Auto DST (AUTO/AT) whenever you select LON, PAR, ATH, ANC, LAX, DEN, CHI, NYC, or TYO as your Home City code.
•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 “To set the time and date manually”.
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. 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.
Inside or | Inside a | Near | Near a | Near high- | Among or |
among | vehicle | household | construction | tension | behind |
buildings |
| appliances, | site, airport, or | power lines | mountains |
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| office | other sources |
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| equipment, | of electrical |
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| or a mobile | noise |
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| phone |
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•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.
•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 Codes and Transmitters
Home City Code | Transmitter | Frequency | |
LON, PAR, ATH | Anthorn (England) | 60.0 kHz | |
Mainflingen (Germany) | 77.5 kHz | ||
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HKG*, TYO | Fukushima (Japan) | 40.0 kHz | |
Fukuoka/Saga (Japan) | 60.0 kHz | ||
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HNL*, ANC*, LAX, | Fort Collins, Colorado | 60.0 kHz | |
DEN, CHI, NYC | (the United States) | ||
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*The areas covered by the HKG, 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 | U.S. Signal | |
U.K. and German Signals |
| |
1,500 kilometers | 2,000 miles | |
| (3,000 kilometers) | |
Mainflingen |
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Anthorn | 600 miles | |
(1,000 kilometers) | ||
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| Fort Collins | |
500 kilometers | 500 kilometers | |
500 kilometers | Fukushima | |
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Fukuoka/Saga |
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| 1,000 kilometers | |
1,000 kilometers |
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Japan Signal
•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.
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 |
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| 1 | 2 | 3 | 4 | 5 | 6 |
LON | Standard Time | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am | Midnight |
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| next day |
| Daylight Saving | 2:00 am | 3:00 am | 4:00 am | 5:00 am | Midnight | 1:00 am |
| Time |
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| next day | next day |
PAR | Standard Time | 2:00 am | 3:00 am | 4:00 am | 5:00 am | Midnight | 1:00 am |
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| next day | next day |
| Daylight Saving | 3:00 am | 4:00 am | 5:00 am | Midnight | 1:00 am | 2:00 am |
| Time |
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| next day | next day | next day |
ATH | Standard Time | 3:00 am | 4:00 am | 5:00 am | Midnight | 1:00 am | 2:00 am |
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| next day | next day | next day |
| Daylight Saving | 4:00 am | 5:00 am | Midnight | 1:00 am | 2:00 am | 3:00 am |
| Time |
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| next day | next day | next day | next day |
HKG, TYO | Standard Time | Midnight | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
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HNL, ANC, LAX, | Standard Time |
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DEN, CHI, NYC | Daylight Saving | Midnight | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
| Time |
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Note
•Auto receive is supported in all modes except while a stopwatch elapsed time operation is in progress.
•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.
•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. Do not perform any button operation within 14 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.
•Signal receive is cancelled if an alarm operation starts while it is being performed.
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 Afor about two |
| seconds until the watch beeps. |
| 3. The stopwatch second hand will move to READY (R) to |
0 | indicate that the watch is setting up for time calibration |
3 |
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reception.
•The stopwatch second hand will move to WORK (W)
READY | and stay there while actual reception is in progress. | |
WORK | • The hour, minute, and | |
keep time normally. | ||
Y(YES) | ||
• The second hand will stop at “0”.* | ||
| * Some models show “60” instead of “0”. | |
| • Time calibration signal reception takes from two to | |
| seven minutes, but in some cases it can take up to 14 | |
0 | minutes. Take care that you do not perform any button | |
3 |
| |
| operations or move the watch during this time. |
N(NO)
•After signal reception is successful, the watch adjusts its hour, minute,
Note
•To interrupt a receive operation and return to the Timekeeping Mode, press any button.
•If signal reception fails for some reason, the watch returns to normal timekeeping without making any adjustments. Next, the stopwatch second hand moves to N (NO) momentarily to indicate that signal reception failed. After about five seconds, the stopwatch second hand moves to 12 o’clock.
•If the stopwatch second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing any button.
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