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Operation Guide 5145
69
Using Summer Time (DST) ■
Summer time, or Daylight Saving Time (DST) as is it is known in some countries, calls
for setting clocks ahead one hour during the summer season. Note that the use of
summer time depends on the country and even the local area.
Turning Summer Time On (DST) or Off (Standard Time) ■
In the World Time Mode, use
D
to display the screen for the city code whose
setting you want to change.
Hold down
A
for about two seconds.
This toggles summer time between on and off.x
The x “DST” indicator will be on the display and
timekeeping will be advanced by one hour when summer
time is turned on.
You can turn summer time on or off independently for x
each World Time Mode city. Note, however, that you
cannot turn on summer time for the “GMT” city code.
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68
Searching for a City ■
In the World Time Mode, press
D
.
This will cause the currently selected World Time City to appear for about two x
seconds, followed by the current time in that city.
Pressing x
D
while a city code is displayed will scroll to the next city code.
Holding down x
D
scrolls at high speed.
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67
World Time
Use the
C
button to enter the World Time Mode as shown under “Modes and
Indicators” on page 17.
World Time lets you display the current time in any one of 48 cities (31 time zones)
around the world.
The times for each city code in the World Time Mode are displayed automatically x
by applying a time differential to the current Timekeeping Mode time.
When you enter the World Time Mode, the screen for the city that was displayed x
when you last exited the mode appears fi rst.
The seconds count in the World Time Mode is synchronized with the Timekeeping x
Mode seconds count.
Important! ■
If the World Time Mode time is incorrect, check to make sure the correct Home City
is selected and that its current time is set correctly in the Timekeeping Mode.
See page 96 for details on how to set the current time.x
66
How can I view the last reception date and time?
9.
In the Timekeeping Mode, press ●
D
(lower right button). This will display the date
and time that the time calibration signal was last received successfully. To return to
the Timekeeping Mode, press
D
again.
If you cannot receive the calibration signal or if the time setting is incorrect after
signal reception, check the setup of the watch.
The following are the watch’s factory default settings, which are confi gured x
automatically whenever you have the battery replaced or when you recharge the
watch’s the battery after it falls to Level 5.
Auto receive ON Auto receive performed.
Home City TYO Tokyo
Summer time AUTO Auto switching (according to signal data)
65
Why can’t I change the auto receive on/off setting?
6.
You will not be able to turn auto receive on or off if you have any city that is not ●
included under “Reception Ranges” on page 39 selected as your Home City. For
details about setting the Home City, see “Time and Date Settings” on page 96.
When is auto receive performed?
7.
Auto receive is performed in the middle of the night, when reception conditions are ●
best. Before going to bed at night, place the watch near a window, with 12 o’clock
facing in the general direction of the transmitter (page 45).
How do I perform manual receive?
8.
In the Timekeeping Mode, hold down ●
D
(lower right button) for about two
seconds. A confi rmation tone will sound to indicate that manual receive has
started. Place the watch near a window, with 12 o’clock (where the antenna is
located) facing in the general direction of the transmitter.
64
Why is the current time shown by the watch one hour ahead even though the
3.
calibration being received successfully?
Is summer time (DST) turned on? Use the procedure under ● “Time and Date
Settings” (page 96) to change the summer time setting to OFF or AUTO.
Why is the current time setting wrong even though the calibration being
4.
received successfully?
Are your Home City settings confi gured correctly? ●
For details about setting the Home City, see “Time and Date Settings” on page 96.
Why are the digital time and analog time different?
5.
Normally, received time calibration data is used to adjust the digital display time, ●
and then the analog hands are adjusted to match the digital time.
If the hands are misaligned for some reason, they will not indicate the correct time.
If this happens, use the procedure under “Hand Home Position Adjustment” (page
106) to adjust the analog time.
63
Is auto receive turned off? ●
Use the procedure under “Turning Auto Receive On or Off“ on page 57 to turn on
auto receive.
Is a timer operation in progress? ●
Signal reception cannot be performed while a timer operation is in progress.
Is the watch in a mode other than the Timekeeping Mode or World Time Mode ●
when an auto receive time (page 48) is reached?
Auto receive is performed only when the watch is in the Timekeeping Mode or
World Time Mode. It is not performed if the watch is in any other mode.
Why is the hourly time signal and current time slightly off even though the
2.
calibration being received successfully?
After the watch receives the time calibration signal, it performs an internal ●
decoding process before updating its time setting. Because of this, the time
setting may be off slightly (within one second).
62
Troubleshooting ■
The watch cannot receive the time calibration signal.
1.
Is the signal being transmitted? ●
Transmission of time calibration signals may be interrupted occasionally due to
maintenance, lightning, etc.
Are you within the reception range of a transmitter? ●
See page 39 for information about areas where the watch can receive the signal.
Is there something in the immediate area that may be interfering with reception? ●
Even if you are within the reception range of a transmitter, digital noise or objects
between you and the transmitter can interfere with reception. Avoid such areas
(see “Positioning the Watch for Best Reception” on page 45) during signal
reception.
Do you have the correct Home City code selected? ●
Calibration signal reception will be impossible if you have any city that is not
included under “Reception Range” on page 39 selected as your Home City. For
details about setting the Home City, see “Time and Date Settings” on page 96.
61
Remember that geographic contours, nearby buildings, the season, or the time ●
of day can make reception impossible even when you are within range of the
transmitter.
Proper reception may be impossible if there is something blocking the signal. If ●
reception is unsuccessful, try again.
You will need to adjust the current time manually when using this watch in an area ●
that is not covered by a receivable time calibration signal.
When the watch is unable to adjust its time using the calibration signal for some ●
reason, timekeeping accuracy is as noted in the specifi cations at the back of this
manual.
Strong electrostatic charge can cause timekeeping error. ●
Receive is canceled if an alarm operation starts while it is being performed. ●
The watch’s calendar shows dates up to the year 2099. Attempting a receive ●
operation after that causes an error.
60
Calibration Signal Reception Precautions ■
Auto receive can be performed only while the watch is in the Timekeeping Mode ●
or World Time Mode.
The receive operation is disabled under any of the following conditions. ●
When a timer operation is in progressx
When the battery is at Level 3 or Level 4x
When the watch is in the recover modex
When the watch is in the function sleep statex
Receipt of a calibration signal causes the digital time to be adjusted fi rst, followed ●
by adjustment of the analog time. In order to ensure proper correction of the
analog time, be sure synchronize the analog time with the digital time so they are
the same before performing a receive operation.
Pressing any button while auto receive is in progress will cause the watch to exit ●
the receive operation.
Make sure you are within the range of a calibration signal transmitter before ●
performing a receive operation.