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Operation Guide 3140

2

 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 diffi cult or even impossible under the conditions listed 

below. 

 

Inside a
vehicle

Near
household
appliances,
office
equipment,
or a mobile
phone

Near a
construction
site, airport,
or other
sources of
electrical
noise

Near
high-tension
power lines

Among or
behind
mountains

Inside or
among
buildings

 

  

  • 

 Signal reception normally is better at night than during the day. 

  • 

 Time calibration signal reception takes from two to seven 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. 

 Home City Codes and Transmitters 

Home City Code

Transmitter

Frequency

HNL*, ANC*, YVR, LAX, YEA, 
DEN, MEX, YWG, CHI, MIA, 
YTO, NYC, YHZ, YYT

Fort Collins, Colorado
(the United States)

60.0 kHz

LIS, LON, MAD, PAR, ROM, 
BER, STO, ATH*, MOW* 

Anthorn (England)

60.0 kHz

 * The areas covered by the  

HNL 

,  

ANC 

,  

ATH 

, and  

MOW 

 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

Fort Collins

600 miles

(1,000 kilometers)

2,000 miles

(3,000 kilometers)

Anthorn

500 kilometers

1,500 kilometers

U.K. signal transmitter approximate
reception range as of April 2007

U.K. Signal

 

  • 

 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. 

 Anthorn (England) transmitter: 500 kilometers (310 miles) 
 Fort Collins (United States) transmitter: 600 miles (1,000 kilometers) 

  • 

 In April 2007, the U.K. signal transmitter was moved from Rugby to Anthorn, which 

resulted in a slight shift in the approximate reception range of the signal. The shift is 
so slight that there is virtually no change in the ability to receive the signal. 

  • 

 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 infl uence 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. 

Your Home City

Auto Receive Start Times

1

2

3

4

5

6

HNL, ANC, YVR,
LAX, YEA, DEN,
MEX, YWG, CHI,
MIA, YTO, NYC,
YHZ, YYT

Standard Time

Daylight
Saving Time

Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am

LIS, LON

Standard Time

1:00 am 2:00 am 3:00 am 4:00 am 5:00 am

Midnight

*

Daylight
Saving Time

2:00 am 3:00 am 4:00 am 5:00 am

Midnight

*

1:00 am

*

MAD, PAR, ROM,
BER, STO

Standard Time

2:00 am 3:00 am 4:00 am 5:00 am

Midnight

*

1:00 am

*

Daylight
Saving Time

3:00 am 4:00 am 5:00 am

Midnight

*

1:00 am

*

2:00 am

*

ATH

Standard Time

3:00 am 4:00 am 5:00 am

Midnight

*

1:00 am

*

2:00 am

*

Daylight
Saving Time

4:00 am 5:00 am

Midnight

*

1:00 am

*

2:00 am

*

3:00 am

*

MOW

Standard Time

4:00 am 5:00 am

Midnight

*

1:00 am

*

2:00 am

*

3:00 am

*

Daylight
Saving Time

5:00 am

Midnight

*

1:00 am

*

2:00 am

*

3:00 am

*

4:00 am

*

 * Next day 

 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 confi guring settings.   

  • 

 Auto receive 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 seven minutes everyday when 

the time in the Timekeeping Mode reaches each of the calibration times. Avoid 
performing any button operation within seven 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 current time 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 displayed 
time actually is the correct time. 

  • 

 Calibration signal reception is disabled while a countdown timer operation is in 

progress. 

 About the Receiving Indicator 

 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. 
  

 

Weak

(Level 0)

Strong

(Level 3)

 

  

  • 

 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 fi nding 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 3 receiving indicator will remain on the display in all modes. The 
Level 3 receiving indicator will not be displayed if signal reception was unsuccessful 
or after you adjust the current time setting manually. 

  • 

 The Level 3 receiving indicator is displayed only when the watch is able to receive 

both time and date data successfully. It does not appear when only time data is 
received. 

  • 

 The Level 3 receiving indicator indicates that at least one of the auto calibration 

signal receive operations was successful. Note, however, that the Level 3 receiving 
indicator is cleared from the display when the fi rst auto receive operation of the day 
is performed. 

 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  

 for about two 

seconds until  

RC! 

 appears on the display. 

  • 

 Time calibration signal reception takes from two to 

seven 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  

  • 

 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  

  • 

 Calibration signal reception is disabled while a countdown timer operation is in 

progress. 

 To turn auto receive on and off 

 1. In the Timekeeping Mode, press  

 to display the Last 

Signal screen. 

 2. Hold down  

 until the receiving indicator and current 

auto receive setting (

 or 

) start to fl ash. 

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  

 to toggle auto receive on (

) and off 

(

). 

  

 4. Press  

 to exit the setting screen. 

  • 

 For information about city codes that support signal receive, see “To specify your 

Home City”. 

 To display the Last Signal screen 

 In the Timekeeping Mode, press  

 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. 

 

Day of week

Home Time
(Hour : Minutes Seconds)

Month – Day

Receive time

Receive date

Year

PM indicator

Current Time and Date Screen

Last Signal Screen

Press

.

DST indicator

 

Receiving indicator

Receiving indicator

On/Off Status

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