Operation Guide 2608 2638 2688
•At distances further than about 600 miles (1,000 kilometers) from the transmitter, signal reception may not be possible during certain times of year or times of day. Radio interferance may also cause problems with reception.
•See the information under “Signal Receive Troubleshooting” if you experience problems with time calibration signal reception.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time calibration signal when the time in the Timekeeping Mode reaches 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. each day (calibration times).
Note
•The auto receive operation is performed only if the watch is in the Timekeeping Mode or World Time Mode when one of the calibration times is reached. It is not performed if a calibration time is reached while an alarm is sounding, or while you are configuring settings (while settings are flashing on the display).
•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 easily receive the signal.
•When auto receive is turned on, the watch receives the calibration signal for two to six minutes everyday when the Timekeeping Mode time reaches each of the calibration times. Do not perform any button operation within six 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 time kept in the Timekeeping Mode. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the Timekeeping Mode time is actually the correct time.
•When two, three, or four receptions are successful, the watch uses the data of the last reception for calibration. When only one reception is successful, the watch uses the data of the successful reception.
About the Receiving Indicator
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal reception.
Problem | Probable Cause | What you should do | |
Cannot perform | • The watch is not in the Timekeeping Mode. | • Enter the Timekeeping Mode | |
manual receive. | • Your current Home City is not one of the | and try again. | |
| following city codes: | • Select LAX, DEN, CHI, or | |
| LAX, DEN, CHI, or NYC. | NYC as your Home City. | |
Auto receive is | • You changed the time setting manually. | • Perform manual signal receive | |
turned on, but | • The watch was not in the Timekeeping | or wait until the next auto | |
the Level 4 | or World Time Mode, or you performed | signal receive operation is | |
receiving | some button operation during the auto | performed. | |
indicator does | receive operation. | • Check to make sure the | |
not appear on | • Even if receive is successful, the Level | watch is in a location where it | |
the display. | 4 receiving indicator disappears every | can receive the signal. | |
| day at 3 am. |
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| • Time data (hour, minutes, seconds) only |
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| was received during the last receive |
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| operation. The Level 4 receiving |
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| indicator appears only when time data |
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| and date data (year, month, day) are |
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| both received. |
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Time setting is | • If the time is one hour off, the DST | • Change the DST setting to | |
incorrect | setting may be incorrect. | Auto DST. | |
• The Home City code setting is not | • Select the correct Home City | ||
following signal | |||
correct for the area where you are using | code. | ||
reception. | |||
| the watch. |
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•For further information, see “Important!” under “Time Calibration Signal Reception” and
World Time
The receiving indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest.
Modules 2608, 2638, and 2688
Module 2608 Module 2638
Receiving indicator | Weak | Strong | |
(Level 1) | (Level 4) | ||
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• Even in an area where signal strength is strong, it takes about 10 seconds for signal |
reception to stabilize enough for the receiving indicator to indicate signal strength. |
• Use the receiving indicator as a guide for checking signal strength and for finding |
City code
Home city time
Current time in the selected city code
World Time shows the current time in 30 cities (29 time zones) around the world.
•For full information on city codes, see the “City Code Table”.
•The current time for all city codes in the World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on the your Home City time setting.
•All of the operations in this section are performed in the World Time Mode, which you enter by pressing C.
the best location for the watch during signal receive operations. |
• Following reception of the time calibration signal and calibration of the watch’s time |
setting, the Level 4 receiving indicator will remain on the display in all modes. The |
Level 4 receiving indicator will not be displayed if signal reception was unsuccessful |
or after you adjust the current time setting manually. |
• The Level 4 receiving indicator is displayed only when the watch is able to |
To view the time for another city code
While in the World Time Mode, press D to scroll through the city codes (time zones) to the east or Bto scroll to the west.
•If the current time shown for a city is wrong, check your Timekeeping Mode time and Home City settings and make the necessary changes.
To toggle a city code time between Standard Time and Daylight Saving Time
successfully receive both time and date data. It does not appear when only time |
data is received. |
• The Level 4 receiving indicator indicates that at least one of the auto calibration |
signal receive operations was successful. Note, however, that the Level 4 receiving |
indicator is cleared from the display at 3:00 a.m. each day. |
To perform manual receive
1. Place the watch on a stable surface so its top (12 o’clock side) is facing towards a window.
2. In the Timekeeping Mode, hold down D for about two seconds until the watch beeps.
•Release D and the message RC! appears to indicate
that signal reception has started.
• Time calibration signal reception takes from two to six minutes. Take care that you do not perform any button operations or move the watch during this time.
•After signal reception is complete, the display of the watch changes to the Last Signal screen.
Note
•To interrupt a receive operation and return to the Timekeeping Mode, press D.
•If the receive operation is unsuccessful, the message ERR appears on the display for about one or two minutes. After that, the watch returns to the Timekeeping Mode.
•You can also change from the Last Signal or ERR screen to the normal timekeeping screen by pressing D.
To turn auto receive on and off
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| 1. In the Timekeeping Mode, hold down Auntil the city |
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| code starts to flash, which indicates the setting screen. |
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| 2. Press Ctwice to move the flashing to the auto receive |
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| on/off setting. |
| l l l l l l l ll | l | l l l l l l | 3. Press Dto toggle auto receive on (ON) and off (OF). | |||
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DST indicator
Module 2608
Module 2638
DST indicator
Module 2688
1.In the World Time Mode, use Band Dto display the city code (time zone) whose Standard Time/Daylight Saving Time setting you want to change.
2.Hold down A to toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator not displayed).
•The DST indicator is on the display whenever you display a city code for which Daylight Saving Time is turned on.
•Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected.
•Daylight Saving Time (DST) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time.
•The watch will perform a signal receive operation even if it is in the World Time Mode when a calibration time is reached. If this happens, the World Time Mode time settings will be adjusted in accordance with the Home City time.
l | l l l | l | does not support signal receive, “xx” appears in |
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Time Recorder
On/off status | turn auto receive on or off. |
4. Press Atwice to exit the setting screen.
•For information about city codes that support signal receive, see “To set your Home City”.
To display the Last Signal screen
In the Timekeeping Mode, press D to display the Last Signal screen (indicated by GET). The Last Signal screen shows the date and time of the last successful time calibration signal reception.
PM | Day of week | Receive time |
indicator |
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| Press D. | |
| ▲ | ▲ |
| Month – Day | Receive date |
| Hour : Minutes Seconds | Last Signal Screen |
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Time record number
Recorded date
Recorded time
(Hour : Minutes seconds)
The Time Recorder lets you store up to 30 records of the current time (month, day, hour, minutes, seconds, and DST on/off setting) with the touch of a button. One way you can use the Time Recorder is to record the start time and the end time of a particular event.
To record a Time Recorder time
In the Timekeeping Mode, hold down Bto record the Home City time (month, day, hour, minutes, seconds, and DST on/off setting).
•The recorded time flashes for about two seconds, and then it is assigned a record number. After that, the Timekeeping Mode screen appears.
•Records are assigned numbers sequentially from #01 through #30.
•Storing a new time record when there are already 30 records stored in memory automatically deletes record #01, shifts the remaining records upwards by 1, and stores the new record as #30.
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