Operation Guide 3258
•Even when the watch is within range of a transmitter, signal reception may be impossible due to the effects of geographic contours, structures, weather, the time of year, the time of day, radio interference, etc. The signal becomes weaker at distances of approximately 500 kilometers, which means that the influence of the conditions listed above becomes even greater.
•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)
Shangqiu (China) transmitter: 500 kilometers (310 miles)
•As of May 2011, China does not use Daylight Saving Time (DST). If China does go to the Daylight Saving Time system in the future, some functions of this watch may no longer operate correctly.
To get ready for a receive operation
1.Confirm that the watch is in the Timekeeping Mode. If it isn’t, use D to enter the Timekeeping Mode (page
2.The antenna of this watch is located on its 12 o’clock side. Position the watch with 12 o’clock facing towards a window as shown in the nearby illustration. Make sure there are no metal objects nearby.
•Signal reception normally is better at night.
•The receive operation takes from two to seven minutes,
12 o’clock | but in some cases it can take as long as 14 minutes. Take |
| care that you do not perform any button operation or |
| move the watch during this time. |
or |
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•Signal reception may be difficult or even impossible under the conditions described below.
Inside or | Inside a | Near | Near a | Near | Among or |
among | vehicle | household | construction | behind | |
buildings |
| appliances, | site, airport, | power 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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3.What you should do next depends on whether you are using Auto Receive or Manual Receive.
•Auto Receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive” below for details.
•Manual Receive: Perform the operation under “To perform manual receive” on page
Auto Receive
•With Auto Receive, the watch performs the receive operation each day automatically up to six times (up to five times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according to the Timekeeping Mode time). When any receive operation is successful, none of the other receive operations for that day are performed.
•When a calibration time is reached, the watch will perform the receive operation only if it is in the Timekeeping Mode or World Time Mode. The receive operation is not performed if a calibration time is reached while you are configuring settings.
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•You can use the procedure under “To turn auto receive on and off” (page
Receive failed
• If the current reception fails but a previous reception (within the |
last 24 hours) was successful, the display shows the receiving |
indicator and the ERR indicator. If the ERR indicator only is |
To perform manual receive
Receiving
Receiving indicator
Receive successful
1.Use D to select the Receive Mode (R/C) as shown on page
2.Hold down A until RC Hold appears on the display and then disappears.
•A signal level indicator (L1, L2, or L3, see page
•If the receive operation is successful, the reception date and time
appear on the display, along with the GET indicator.
The watch will return to the Timekeeping Mode if you press D or if you do not perform any button operation for about two or three minutes.
If there was a previously
successful reception
displayed (without the receiving indicator), it means that all of the |
receive operations over the past 24 hours have failed. |
The watch will return to the Timekeeping Mode without changing |
the time setting if you press D or if you do not perform any button |
operation for about two or three minutes. |
Note
You can interrupt a time calibration signal reception operation by pressing any button.
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Signal Level Indicator
Signal level indicator
During manual receive, the signal level indicator displays the signal level as shown below.
Weak (Unstable) 
Strong (Stable)
As you watch the indicator, keep the watch in a location that best maintains stable reception.
•Even under optimum reception conditions, it can take about 10 seconds for reception to stabilize.
•Note that weather, the time of day, surroundings, and other factors all can affect reception.
To check the latest signal reception results
Enter the Receive Mode (page
•When receive is successful, the display shows the time and date that receive was successful.
• To return to the Timekeeping Mode, press D.
Note
The receiving indicator will not be displayed if you have adjusted the time or date setting manually since the last receive operation.
Receiving indicator
To turn auto receive on and off
Receiving indicator
1. Enter the Receive Mode (page
2. Hold down E until On or OFF flashes on the display. This is the setting screen.
• Note that the setting screen will not appear if the currently selected Home City is one that does not support time calibration reception.
3. Press A to toggle auto receive on (On) and off (OFF).
4. Press E to exit the setting screen.
On/Off status
Radio-controlled Atomic Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time setting.
•Even if a receive operation is successful, certain conditions can cause the time setting to be off by up to one second.
•The watch is designed to update the date and day of the week automatically for the period January 1, 2000 to December 31, 2099. Updating of the date by signal reception will no longer be performed starting from January 1, 2100.
•If you are in an area where signal reception is not possible, the watch keeps time with the precision noted in “Specifications”.
•The receive operation is disabled under any of the following conditions.
–While power is at Level 3 (L) or lower (page
–While the watch is in the power recovery mode (page
–While a sensor operation is being performed
–When the watch is in the function sleep state (“Power Saving”, page
–While a countdown timer operation is in progress (page
•A receive operation is cancelled if an alarm sounds while it is being performed.
•The Home City setting reverts to the initial default of TYO (Tokyo) whenever the battery power level drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the Home City to the setting you want (page
Mode Reference Guide
Your watch has 11 “modes”. The mode you should select depends on what you want to do.
To do this: | Enter this mode: | See: | |
• View the current date in the Home City |
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• Configure Home City and daylight saving time (DST) settings | Timekeeping Mode | ||
• Configure time and date settings manually |
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• Determine your current bearing or the direction from your current |
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location to a destination as a direction indicator and angle value | Digital Compass Mode | ||
• Determine your current location using the watch and a map |
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• View the barometric pressure and temperature at your current location | Barometer/Thermometer | ||
• View a graph of barometric pressure readings | Mode | ||
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• View the altitude at your current location |
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• Determine the altitude differential between two locations (reference | Altimeter Mode | ||
point and current location) | |||
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• Record an altitude reading with the measurement time and date |
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View information about tide conditions and the Moon phase | Tide/Moon Data Mode | ||
Recall records created in the Altimeter Mode | Data Recall Mode | ||
Set an alarm time | Alarm Mode | ||
Use the stopwatch to measure elapsed time | Stopwatch Mode | ||
Use the countdown timer | Countdown Timer Mode | ||
View the current time in one of 48 cities (31 time zones) around the globe | World Time Mode | ||
• Perform a time calibration receive operation | Receive Mode | ||
• Check whether the last receive operation was successful | |||
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