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Operation Guide 2639 2819
2
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from two to six minutes, but in some cases it
can take as long as 12 minutes. Take care that you do not perform any button
operations or move the watch during this time.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances or
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
• When within range of the applicable transmitter, this watch can receive either the
U.S. (Fort Collins, Colorado) or Japanese (Fukushima or Fukuoka/Saga) time
calibration signal. The signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Home City Code
LAX
,
DEN
,
CHI
,
NYC
TYO
*
Frequency
60kHz
40kHz
60kHz
Transmitter
Fort Collins, Colorado
Fukushima
Fukuoka/Saga
*
With
TYO
, you can specify either 40kHz or 60kHz.
• 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.
• At distances further than about 500 kilometers from the Fukushima and Fukuoka/
Saga transmitter, signal reception may not be possible during certain times of year
or times of day. Radio interferance may also cause problems with reception.
• Even when the watch is within the reception range of the transmitter, signal
reception is impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
Fukuoka/Saga
500
kilometers
Fukushima
500
kilometers
Fort Collins
600 miles
Reception Ranges
•
Signal reception is affected by weather, atmospheric conditions, and seasonal changes
.
• 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
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
.
Receiving indicator
Weak
Strong
(Level 1)
(Level 4)
Module
2819
Module
2639
• 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 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 receive
both time and date data successfully. 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.
Receiving indicator
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 configure the auto receive setting for the U.S.
• The following procedure applies when you have LAX,
DEN, CHI, or NYC selected as your Home City. If
you are using the watch in Japan, see “To configure auto
receive settings for Japan”.
1.In the Timekeeping Mode, hold down A until the
transmitter indicator starts to flash, which indicates the
setting screen.
• If
TYO is selected as the Home City, you can specify
a transmitter selection mode.
2.Press C three times to move the flashing to the auto
receive on/off setting.
On/off status
3. Press D to toggle auto receive on (ON) and off (OF).
• If the current Home City setting is a city code that does not support signal receive,
“xx” appears in place of the on/off indicator. This means you cannot turn auto
receive on or off.
4. Press A twice to exit the setting screen.
• For information about city codes that support signal receive, see “To set your Home
City”.
▲
Press D.
Day of week
Receive time
Month – Day
PM
indicator
▲
Receive date
Last Signal Screen
Hour : Minutes Seconds
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.
• The last signal screen remains on the display for about one or two minutes.
After that, the Timekeeping Mode screen reappears.
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
Probable Cause
•
The watch is not in the Timekeeping Mode.
• Your current Home City is not one of the
following city codes:
LAX, DEN, CHI, NYC, or TYO.
• You changed the time setting manually.
• The watch was not in the Timekeeping
or World Time Mode, or you performed
some button operation during the auto
receive operation.
•
Even if receive is successful, the Level 4
receiving indicator disappears every day
at 3 am.
• Time data (hour, minutes, seconds) only
was received during the last receive
operation. The Level 4 receiving
indicator appears only when time data
and date data (year, month, day) are
both received.
• If the time is one hour off, the DST
setting may be incorrect.
• The Home City code setting is not
correct for the area where you are using
the watch.
What you should do
• Enter the Timekeeping Mode
and try again.
• Select LAX, DEN, CHI, NYC,
or TYO as your Home City.
• Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
• Check to make sure the
watch is in a location where it
can receive the signal.
• Change the DST setting to
Auto DST.
• Select the correct Home City
code.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
World Time
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
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.
Home city time
City code
Current time in the
selected city code
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 B to 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.