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Operation Guide 4350
• 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 is normally better at night than during the day.
• Time calibration signal reception takes from four 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 City code setting as shown below.
Home City Code
ET (GMT –5),CT (GMT –6)
Fort Collins, Colorado
MT (GMT –7),PT (GMT –8)
(the United States)
–09 (GMT –9),–10 (GMT –10)
TYO (GMT +9)
Fukuoka/Saga (Japan)
Reception Ranges
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
500
kilometers
Fukuoka/Saga
1,000
kilometers
• At distances further than about 600 miles (1,000 kilometers) from the Fort Collins
(the United States) 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 (310 miles) from the Fukushima and
Fukuoka/Saga (Japan) 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 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.
• See the information under "Signal Reception Troubleshooting" if you experience
problems with time calibration signal reception.
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 Time Zone, and whether standard time or Daylight Saving Time is
selected for your Home Time Zone.
Your Home Time Zone
1
TYO (GMT +9) Standard Time
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
ET (GMT –5),
Standard Time and
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
CT (GMT –6),
Daylight Saving Time
MT (GMT –7),
PT (GMT –8),
–09 (GMT –9),
–10 (GMT –10)
Note
• Auto receive is supported in all modes except while a stopwatch elapsed time
operation is in progress.
• 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 receive the signal easily.
• The watch receives the calibration signal for two to 14 minutes everyday when the
time in the Timekeeping Mode reaches each of the calibration times. Do not perform
any button operation within ten 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.
Near a
Near high-
Among or
behind
construction
tension
site, airport, or
power lines
mountains
other sources
of electrical
noise
Transmitter
Frequency
60.0 kHz
Fukushima (Japan)
40.0 kHz
60.0 kHz
500
kilometers
Fukushima
1,000
kilometers
Auto Receive Start Times
2
3
4
5
6
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 stopwatch 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
R(READY)
while actual reception is in progress.
• The hour and minute hands continue to keep time
W(WORK)
normally.
Y(YES)
• Time calibration signal reception takes from four 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). 10 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 stopwatch second hand will move to N (NO).
5 second later, the stopwatch second hand will resume normal operation, without
any adjustment of the hand setting.
• If the stopwatch 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 Receive Result Mode to check if signal reception was performed
correctly.
To check the latest signal reception results
1. In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal
receive operation since midnight, the stopwatch 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 or when you press A.
• 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.
• Y (YES) continues to be indicated even if an attempt at
manual receive fails after auto receive is successful.
• 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
stopwatch
manually.
• The watch was not in the
second hand
is pointing at
Timekeeping Mode, or you performed
N (NO).
some button operation during the
auto receive operation.
• Signal reception results are reset at
midnight each day.
• The Home Time Zone setting is not
Time setting is
incorrect
correct for the area where you are
following signal
using the watch.
reception.
• For further information, see "Important!" under "Time Calibration Signal Reception"
and "Radio-controlled Atomic Timekeeping Precautions".
Dual Time
The Dual Time lets you keep track of time in a different
Dual Time minute hand
time (24-hour format).
• All of the operations in this section are performed in the
Timekeeping Mode.
• The Dual Time is synchronized with the current time.
To set the Dual Time
1. In the Timekeeping Mode, each press of D advances
Dual Time 30 minutes. Press D to set the Dual Time
that you want.
Dual Time hour hand
Stopwatch
The stopwatch lets you measure elapsed time.
Stopwatch second hand
• The display range of the stopwatch is 23 hours, 59
minutes, 59.95 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• You cannot switch to another mode while a stopwatch
elapsed time operation is in progress.
• All of the operations in this section are performed in the
Stopwatch Mode.
To measure elapsed time
• Stopwatch hour hand
1. Press B to start the stopwatch.
(24-hour format)
2. Press B to stop the stopwatch.
• Stopwatch minute hand
• You can resume the measurement operation by
Stopwatch 1/20 second hand
pressing B again.
* This hand rotates and indicates
• The 1/20 second hand rotates during the first 60
the second count during the first
seconds only, and then stops. When elapsed timing is
60 seconds.
stopped (by pressing B), this hand jumps to the 1/20
second indication (which is kept internally).
3. Check the elapsed time.
• Press A to reset the stopwatch.
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.
2
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