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Operation Guide 4717
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• Auto Receive
With 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. For more information, see "About Auto Receive".
• Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see "To perform manual receive".
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.
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
Inside a
Near
among
vehicle
household
buildings
appliances,
office
equipment,
or a mobile
phone
• Signal reception normally is better at night than during the day.
• Time calibration signal reception takes from two to seven minutes, but in some
cases it can take as long as 14 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 Time Zone setting as shown below. If you use the watch in Japan (which has
two different transmitter locations), it will try to receive the time calibration signal
from one of the transmitters in your current location. If it cannot receive the signal, it
will then try to receive the time calibration signal from the other transmitter.
Home Time Zones and Transmitters
Home Time Zone
Transmitter
–5.0 (DST –4.0)
–6.0 (DST –5.0)
–7.0 (DST –6.0)
Fort Collins, Colorado
–8.0 (DST –7.0)
(the United States)
–9.0 (DST –8.0)
–10.0 (DST –9.0)
8.0 (DST 9.0)
Fukushima (Japan)
9.0 (DST 10.0)
Fukuoka/Saga (Japan)
Approximate Reception Ranges
U.S. Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
500
kilometers
Fukuoka/Saga
1,000
kilometers
• Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference also may cause problems with reception.
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
• Even when the watch is within the reception range of the transmitter, signal
reception will be impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
• Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
Your Time Zone
1
–5.0 (DST –4.0)
Standard Time and
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
–6.0 (DST –5.0)
Daylight Saving
–7.0 (DST –6.0)
Time
–8.0 (DST –7.0)
–9.0 (DST –8.0)
–10.0 (DST –9.0)
Standard Time
8.0 (DST 9.0)
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
9.0 (DST 10.0)
12 o'clock
or
Among or
Near a
Near high-
construction
tension
behind
site, airport, or
power lines
mountains
other sources
of electrical
noise
Frequency
60.0 kHz
40.0 kHz
60.0 kHz
Japan Signals
500
kilometers
Fukushima
1,000
kilometers
Auto Receive Start Times
2
3
4
5
6
Note
• Calibration signal reception is performed automatically whenever a calibration time is
reached while the watch is in the Timekeeping Mode or Dual Time Mode. Note,
however, that auto receive is not performed if a calibration time is reached in the
following cases:
While an alarm is sounding
While a button is depressed
• 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 14 minutes every day when the
time in the Timekeeping Mode reaches each of the calibration times. Avoid
performing any button operation within 14 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.
To perform manual receive
1. Place the watch on a stable surface so its 12 o'clock
side is facing towards a window.
2. In the Timekeeping Mode, hold down A for about two
seconds until the watch beeps.
3. The second hand will move to R (READY) to indicate
that the watch is setting up for time calibration
reception.
• The second hand will move to W (WORK) and stay there
while actual reception is in progress.
R (READY)
W (WORK)
• The hour and minute hands continue to keep time
normally.
Y (YES)
• Time calibration signal reception takes from two to
seven minutes, but in some cases it can take up to 14
minutes. Take care that you do not perform any button
operations or move the watch during this time.
• If reception is successful, the second hand will move to
Y (YES). Five seconds later, the hands will move to the
correct time.
N (NO)
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If reception is not successful, the second hand will move to N (NO).
Five seconds later, the second hand will resume normal operation, without any
adjustment of the hand setting.
• If the second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing any button.
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive was
successful.
To check the latest signal reception results
In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal
receive operation since midnight, the second hand will
move to Y (YES). If the watch has been unable to
receive any signal successfully, the second hand will
move to N (NO).
• The watch will return to the Timekeeping Mode after five
seconds.
• The current receive result is cleared when the first auto
receive operation is performed on the following day. This
means Y (YES) indicates successful signal reception
since the start of the current day.
• If you adjust the time or date setting manually, the
second hand will move to N (NO).
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Probable Cause
• You changed the time setting
The second
hand is
manually.
• You performed some button operation
pointing at N
(NO).
during the auto receive operation.
• Signal reception results are reset
when the first auto receive
operation of the day is performed.
• The Home Time Zone setting is not
Time setting is
incorrect
correct for the area where you are
following signal
using the watch.
• The home position of the hands is
reception.
off.
• For further information, see "Important!" under "Time Calibration Signal Reception"
and "Radio-controlled Atomic Timekeeping Precautions".
Stopwatch
Stopwatch 1/20 second hand
The stopwatch lets you measure elapsed time.
• The display range of the stopwatch is 59 minutes, 59.99
* This hand rotates and indicates
the second count during the first
seconds.
60 seconds.
• Entering the Stopwatch Mode causes the second hand,
Stopwatch
the stopwatch minute hand and stopwatch 1/20 second
Second hand
1/100 second
hand to move to their 12 o'clock positions.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
Stopwatch minute
hand
What you should do
• 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.
• Select the correct Home
Time Zone.
• Enter the Hand Setting Mode
and adjust the home position.
2
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