Operation Guide 5178
•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 “Home City and DST” (page
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 (five times for the China signal). When any auto receive is successful, the remaining auto receive operations are not performed. For more information, see “About Auto Receive” (page
•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
•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.
Your Home City | Auto Receive Start Times |
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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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TYO | Standard Time | Midnight | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
HKG | Standard Time | 1:00 am | 2:00 am | 3:00 am | 4:00 am | 5:00 am |
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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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* Next day
To perform manual receive
1. Place the watch on a stable surface so its 12 o’clock side is facing towards a window (page
2. In the Timekeeping Mode, hold down Afor about two seconds.
3. The second hand will move to READY (R) to indicate that the watch is setting up for time calibration reception.
•The second hand will move to WORK (W) and stay there while actual reception is in progress.
•If signal reception is unstable during reception, the
second hand may move between WORK (W) and READY (R).
•The hour and minute hands continue to keep time normally.
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
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.
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day (five times for the China signal). 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.
Note
•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.
•Remember that reception of the calibration signal depends on the current time in the Timekeeping Mode.
•If reception is successful, the second hand will move to
YES (Y), and the date and time settings will be adjusted accordingly. Normal timekeeping will resume after that.
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NO (N) | YES (Y) |
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Note
•To interrupt a receive operation and return to the Timekeeping Mode, press any button.
•If reception is not successful, the second hand will move to NO (N). Five seconds later, the second hand will resume normal operation, without any adjustment of the hand setting.
•If the second hand is pointing to YES (Y) or NO (N), you can return to the Timekeeping Mode by pressing A.
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem | Probable Cause | What you should do |
The second | • You changed the time setting | • Perform manual signal |
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NO (N)
YES (Y)
In the Timekeeping Mode, press A.
•If the watch was able to perform a successful signal receive operation since midnight, the second hand will move to YES (Y). If the watch has been unable to receive any signal successfully, the 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 second hand will move to NO (N).
hand is pointing | manually. | receive at night or wait until |
at NO (N). | • You performed some button | the next auto signal receive |
| operation during the auto receive | operation is performed. |
| operation. | • Enter the Timekeeping |
| • The watch is not in the | Mode and try again. |
| Timekeeping Mode. | • Check to make sure the |
| • Signal reception results are reset | watch is in a location |
| when the first auto receive | where it can receive the |
| operation is performed on the | signal (page |
| following day. |
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| • Radio interference is often present |
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| during the day time, which can |
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| interfere with calibration signal |
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| reception. |
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