Operation Guide 5007
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.
Inside or | Inside a | Near | Near a | Near high- | Among or |
among | vehicle | household | construction | tension power | behind |
buildings |
| appliances, | site, airport, | lines | mountains |
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| office | or other |
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| equipment, | sources of |
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| or a mobile | electrical |
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| phone | noise |
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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. |
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* |
| Daylight | 2:00 am | 3:00 am | 4:00 am | 5:00 am | Midnight* | 1:00 am* |
| Saving Time |
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PAR | Standard Time | 2:00 am | 3:00 am | 4:00 am | 5:00 am | Midnight* | 1:00 am* |
| Daylight | 3:00 am | 4:00 am | 5:00 am | Midnight* | 1:00 am* | 2:00 am* |
| Saving Time |
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ATH | Standard Time | 3:00 am | 4:00 am | 5:00 am | Midnight* | 1:00 am* | 2:00 am* |
| Daylight | 4:00 am | 5:00 am | Midnight* | 1:00 am* | 2:00 am* | 3:00 am* |
| Saving Time |
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HKG, TYO | Standard Time | Midnight | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
HNL, ANC, | Standard Time |
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LAX, DEN, | Daylight | Midnight | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
CHI, NYC | Saving Time |
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Note | * Next day |
•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 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 every day 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 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.
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 to indicate that the watch is setting up for time calibration reception.
• The stopwatch second hand will move to WORK and
| stay there while actual reception is in progress. | |
| • If signal reception is unstable during reception, the | |
WORK | stopwatch second hand may move between WORK and | |
READY. | ||
READY | ||
• The hour and minute hands continue to keep time | ||
| normally. | |
| • 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. | |
| • If reception is successful, the stopwatch second hand | |
| will move to YES (Y). Five seconds later, the hands will | |
| move to the correct time. |
Home City Codes and Transmitters |
Home City Code | Transmitter | Frequency |
NO (N)
Note
YES (Y)
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.
Approximate Reception Ranges | U.S. Signal | |
U.K. and Germany Signals |
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1,500 kilometers |
| 2,000 miles |
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| (3,000 kilometers) |
| Mainflingen |
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Anthorn |
| 600 miles |
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| (1,000 kilometers) |
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| Fort Collins |
500 kilometers |
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The Anthorn |
| 500 kilometers |
500 kilometers |
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signal is | Fukushima | |
receivable |
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within this area. | Fukuoka/Saga | 1,000 kilometers |
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| 1,000 kilometers | Japan Signals |
•Even when the watch is within the reception range of a transmitter, signal reception may be impossible at times due to the effects of geographic contours, structures, weather, the season of the year, the time of day, radio interference, etc. Note that the signal becomes weaker at distances of approximately 500 kilometers from the transmitter, which means that the influence of the conditions listed above becomes even greater.
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.
•To interrupt a receive operation and return to the Timekeeping Mode, press any button.
•If reception is not successful, the stopwatch second hand will move to NO (N). Five seconds later, the stopwatch second hand will resume normal operation, without any adjustment of the hand setting.
•If the stopwatch second hand is pointing to YES (Y) or NO (N), you can return to the Timekeeping Mode by pressing A.
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive operation was successful.
To check the latest signal reception results
In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal receive operation since midnight, the stopwatch second hand will move to YES (Y). If the watch has been unable to receive any signal successfully, the stopwatch second hand will move to NO (N).
• The watch will return to the Timekeeping Mode after five seconds or when you press A.
• The current receive result is cleared when the first auto receive operation is performed on the following day. This means YES (Y) indicates successful signal reception since the start of the current day.
• If you adjust the time or date setting manually, the stopwatch second hand will move to NO (N).
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem | Probable Cause | What you should do |
The stopwatch | • You changed the time setting manually. | • Perform manual signal |
second hand is | • You performed some button operation | receive at night or wait until |
pointing at NO | during the auto receive operation. | the next auto signal receive |
(N). | • The watch is not in the | operation is performed. |
| Timekeeping Mode. | • Enter the Timekeeping |
| • Signal reception results are reset | Mode and try again. |
| when the first auto receive operation | • Check to make sure the |
| is performed on the following day. | watch is in a location |
| • Radio interference is often present | where it can receive the |
| during the day time, which can | signal. |
| interfere with calibration signal |
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| reception. |
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The time setting | • The Home City setting is not | • Select the correct Home |
is incorrect | correct for the area where you are | City. |
following signal | using the watch. | • Enter the home position |
reception. | • The home position of the hands is | adjustment mode and |
| off. | adjust the home position. |
•For further information, see “Important!” under “Time Calibration Signal Reception” and
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