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Operation Guide 5178
E-20
•
If you experience problems receiving the time calibration signal in your area, it
probably is best to switch between Standard Time and Daylight Saving Time (summer
time) manually. For more information, see “Home City and DST” (page E-38).
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 (five times for the China signal). When any auto receive is successful, the
remaining auto receive operations are not performed. For more information, see
“About Auto Receive” (page E-23).
• 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” (page E-26).
E-21
12 o’clock
or
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.
E-22
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
• 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.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near high-
tension power
lines
Among or
behind
mountains
Near
household
appliances,
office
equipment,
or a mobile
phone
E-23
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day (five
times for the China signal). 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.
E-24
Your Home City Auto Receive Start Times
LON
PAR
ATH
TYO
HKG
HNL, ANC,
LAX, DEN,
CHI, NYC
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Standard Time
Standard Time
Daylight
Saving Time
1
1:00 am
2:00 am
2:00 am
3:00 am
3:00 am
4:00 am
Midnight
1:00 am
Midnight
2
2:00 am
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
1:00 am
2:00 am
1:00 am
3
3:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight*
2:00 am
3:00 am
2:00 am
4
4:00 am
5:00 am
5:00 am
Midnight*
Midnight*
1:00 am*
3:00 am
4:00 am
3:00 am
5
5:00 am
Midnight*
Midnight*
1:00 am*
1:00 am*
2:00 am*
4:00 am
5:00 am
4:00 am
6
Midnight*
1:00 am*
1:00 am*
2:00 am*
2:00 am*
3:00 am*
5:00 am
5:00 am
* Next day
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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 configuring settings.
• 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.
• Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode.
E-26
To perform manual receive
1.Place the watch on a stable surface so its 12 o’clock
side is facing towards a window (page E-21).
2.In the Timekeeping Mode, hold down A for about two
seconds.
3.The second hand will move to READY (R) to indicate
that the watch is setting up for time calibration
reception.
• The second hand will move to WORK (W) and stay there
while actual reception is in progress.
• If signal reception is unstable during reception, the
second hand may move between WORK (W) and
READY (R).
• The hour and minute hands continue to keep time
normally.
30
READY (R)
WORK (W)
E-27
• If reception is successful, the second hand will move to
YES (Y), and the date and time settings will be adjusted
accordingly. Normal timekeeping will resume after that.
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 NO (N). Five seconds
later, the second hand will resume normal operation, without any adjustment of the
hand setting.
•
If the second hand is pointing to
YES
(
Y
) or
NO
(
N
), you can return to the Timekeeping
Mode by pressing
A
.
30
YES (Y)
NO (N)
E-28
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive
operation 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 YES (Y). If the watch has been unable to
receive any signal successfully, the second hand will
move to NO (N).
• 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 YES(Y) 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 NO (N).
30
YES (Y)
NO (N)
E-29
Probable Cause
• You changed the time setting
manually.
• You performed some button
operation during the auto receive
operation.
• The watch is not in the
Timekeeping Mode.
• Signal reception results are reset
when the first auto receive
operation is performed on the
following day.
• Radio interference is often present
during the day time, which can
interfere with calibration signal
reception.
Problem
The second
hand is pointing
at NO (N).
What you should do
•
Perform manual signal
receive at night or wait until
the next auto signal receive
operation is performed.
•
Enter the Timekeeping
Mode and try again.
• Check to make sure the
watch is in a location
where it can receive the
signal (page E-21).
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.