Operation Guide 3390
Calibration Signal Reception Precautions
•Auto reception can be performed while the watch is in the Timekeeping Mode or World Time Mode only.
•When a time calibration signal is received, the watch corrects its digital time setting first, and then adjusts the analog time setting accordingly. In order to ensure that the analog time matches the digital time, make sure you adjust the analog time to match the digital time before signal reception is performed.
•Pressing any button while auto reception is in progress will cause the watch to beep and then exit the receive operation.
•Make sure you are within the range of the calibration signal transmitter before performing the reception operation. Remember that geographic contours, nearby buildings, seasonal conditions, the time of day, can even make reception impossible even when you are within range of the transmitter.
•Proper reception may be impossible if there is something blocking the signal. If reception is unsuccessful, try again.
•This watch is designed to adjust its current time setting in accordance with the calibration signal transmitted in Japan and the United States only. It operates like a standard
•When the watch is unable to adjust its time signal using the calibration signal for some reason, timekeeping accuracy is within
±15 seconds per month.
•Strong electrostatic charge can cause timekeeping error.
•Signal reception is cancelled if an alarm starts to sound while it is being performed.
•The watch’s calendar shows dates up to the year 2099. Attempting a receive operation after that causes an error.
Troubleshooting
The watch cannot receive the time calibration signal.
•Is the signal being transmitted?
Though the Japanese calibration signal (Call Sign: JJY) is continually transmitted by the National Institute of Information and Communications Technology (NICT) in theory, it may sometimes be interrupted for periodic maintenance work, or because of lightening or other problems.
•Are you within the reception range of a transmitter?
See “Reception Range” for information about areas where the watch can receive the signal.
•Is there something in the immediate area that may be interfering with reception?
Even if you are within the reception range of a transmitter, objects between you and the transmitter or electrical noise can interfere with reception. Avoid such areas during signal reception. See “Location” for more information.
•Do you have the correct Home City code selected? Remember that auto receive is not performed unless TYO (Japan), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles) is selected as the Home City. Select the correct Home City code using the procedure under “To configure home time settings”.
•Is auto receive turned off (OFF)?
Use the procedure under “Configuring Auto Receive Settings” to turn on auto receive.
•Is the watch in any mode other than the Timekeeping Mode or World Time Mode during the auto receive times (midnight, 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)?
Auto receive is performed only when the watch is in the Timekeeping Mode or World Time Mode. It is not performed if the watch is in any other mode.
Time calibration signal reception is successful, but the hourly time signal and current time are slightly off.
•After the watch receives the time calibration signal, it performs an internal decoding process before updating its time setting. Because of this, the time setting may be slightly off (within one second).
Time calibration signal reception is successful, but the current time is one hour fast.
•Do you have summer time (DST) turned on (ON)?
Use the procedure under “To configure home time settings” to turn off summer time.
Time calibration signal reception is successful, but the current time setting is wrong.
•Is the correct city code selected for your Home City?
If you are in Japan, you should have TYO selected for your Home City. For other areas, select the correct Home City code using the procedure under “To configure home time settings”.
The auto receive ON/OFF settings don’t appear when configuring auto receive settings.
• Check the auto signal reception setting whenever you have |
problems with signal reception or when the time setting produced |
by signal reception is incorrect. |
Face Illumination
•Auto receive ON/OFF settings do not appear on the display unless TYO (Japan), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles) is selected as the Home City. Use the procedure under “To configure home time settings” to select your correct Home City.
The auto receive AUTO, 40, and 60 settings do not appear when configuring auto receive settings.
•The AT, JP40, and JP60 transmitter selection mode options are available only when TYO (Tokyo) is selected as the Home City code.
Use the procedure under “To configure home time settings” to select your correct Home City.
What time is auto receive performed?
•Auto receive is performed in the middle of the night, when reception conditions are best.
Before going to bed at night, place the watch near a window, with its 12 o’clock position facing in the general direction of the transmitter.
How can I perform manual receive?
• Hold down the lower right D button for about two seconds. |
The watch will beep to indicate that manual receive has started. |
Place it near a window, with its 12 o’clock position facing in the |
• The initial factory default configuration of the reception settings |
are shown below. You do not need to change these settings if |
you use the watch in Japan. |
Auto Receive |
| Auto Japan transmitter select |
| (40kHz/ 60kHz) | |
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Home City |
| Tokyo |
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Summer Time |
| Auto switching in accordance |
| with signal data | |
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Pressing the B button in any mode (except when a flashing setting screen is displayed) illuminates the face of the watch for easy reading in the dark.
•You can use the procedure under
“To specify the illumination duration” to configure the illumination duration as approximately 1.5 seconds or 3 seconds.
Important!•The light may be difficult to see if you turn it on under bright sunlight.
•If you press a button that sounds a confirmation tone to sound or if an alarm operation starts while the face is illuminated, illumination will turn off.
•Illumination is disabled while a manual time calibration signal receive operation is in progress.
❚To specify the illumination duration
2. Press the C button three
times to display the flashing seconds count.
(3 times) Seconds
3. Press the B button to toggle the illumination duration between about 1.5 seconds ( 
indicator) and 3 seconds
( 
indicator).
4. After the setting is the way you want, press the A button to exit the setting screen.
general direction of the transmitter. |
How can I view the last reception date and time?
•In the Timekeeping Mode, press the lower right Dbutton.
This will display the date and time that the time calibration signal was last received successfully. To return to the Timekeeping Mode, press the D button again.
1. In the Timekeeping Mode,
hold down the Abutton | • The watch will also exit the setting screen automatically if you | |
do not perform any operation for about two or three minutes. | ||
for about two seconds. | ||
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• This will cause your city code to flash on the display.
City Code
3