G-Shock GW-A1100 - Manual (Page 4)

Operation Guide 5311
E-39
To switch between standard time and summer time manually
1. Perform steps 1 and 2 under “To confi gure Home City settings” (page E-36).
x Selecting a city code will cause the z Hour Hand, c Minute Hand, and
v Upper Dial Hand to move automatically to the current time for the selected
city code.
x If you will use the watch in a city that is not included in the city code list, select a
city code that is in the same time zone as your city.
x Displaying the Home City Settings screen will cause the b Lower Dial Hand to
move to AT (auto switching), STD (standard time), or DST (daylight saving time).
AT (AUTO)
The watch automatically switches between standard time and daylight
saving time in accordance with its calendar.
STD The watch always shows standard time.
DST The watch always shows daylight saving time.
E-38
STD/DST Switching
You can select summer time or standard time independently for each city. The initial
default setting for all cities is AT (AUTO).
Normally you should use the AT (AUTO) setting because it automatically switches
between summer time and standard time. You should change the setting to STD
(standard time) or DST (summer time) in the following cases.
− When using a time of a location that is not included in the watch’s list of 29 cities
− When the preset AUTO standard time/summer time timing is incorrect for some
reason
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
x Note that you cannot switch between STD (standard time) and DST (daylight
saving time) while UTC* is selected as your Home City.
* Coordinated Universal Time, the world-wide scientifi c standard of timekeeping. The
reference point for UTC is Greenwich, England.
E-37
x If you do not perform any operation with the crown for about two minutes after
pulling it out, crown operations will become disabled and the hand will not move
if you rotate the crown. If this happens, push the crown back in and then pull it
out again.
x For details about city codes, see the “City Code Table” at the back of this
manual.
2. Rotate the crown to move the x Second Hand to the city
code you want to select as your Home City.
x Each time you select a city code, the z Hour Hand,
c Minute Hand and n Day Indicator move to the
current time and day for that city code.
3. Push the crown back in to return to the Timekeeping
Mode.

+
6 @
B
E-36
Confi guring Home City Settings
The Home City is location where you will normally use the watch. You can choose
from a selection of city codes that represent 29 cities around the globe.
To confi gure Home City settings
Note
x This watch does not have a city code that corresponds
to Newfoundland.
1. Pull out the crown.
x This will cause the x Second Hand to move to the
city code of the currently selected Home City.
x This indicates the city code setting mode.

@
TYO (TOKYO)
E-35
Timekeeping
To enter the Timekeeping Mode, hold down C at least two seconds.
Hand Functions
z Hour Hand
x Second Hand
c Minute Hand
v Upper Dial Hand: Indicates the current hour in the
Home City time in 24-hour format.
b Lower Dial Hand: Points to the day of the week.
n Day Indicator

+
6 *
@ > B
E-34
To select a mode
Each press of
C will cycle between modes. The currently selected mode is indicated
by the b Lower Dial Hand.
*
Timekeeping Mode World Time Mode
C
C
C
C
Stopwatch Mode Countdown Timer Mode
C
Alarm Mode
E-33
To do this: Enter this mode: See:
x Set an alarm time
x Turn the alarm ON or OFF
Alarm Mode
E-75
E-78
Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.
To determine the watch’s current mode
Check what the
b b Lower Dial Hand is indicating as shown
under “To select a mode” (page E-34).
To return to the Timekeeping Mode from any other
mode
Hold down
C for at least two seconds.

*
E-32
Mode Reference Guide
Your watch has fi ve “modes”. The mode you should select depends on what you want
to do.
To do this: Enter this mode: See:
x Confi gure Home City and DST (daylight saving time) settings
x Perform a time calibration signal receive operation or view
the last receive result
x Change the Auto Receive on/off setting
x Confi gure time and day settings manually
x Determine magnetic north
Timekeeping Mode
E-35
E-48
x View the current time in one of 29 cities around the globe
x Confi gure World Time City and summer time settings
x Swap the Home City and World Time City
World Time Mode
E-63
E-64
E-67
Use the stopwatch to measure elapsed time Stopwatch Mode E-69
Use the countdown timer
Countdown Timer
Mode
E-72
E-31
Radio-controlled Atomic Timekeeping Precautions
x Strong electrostatic charge can result in the wrong time setting.
x Even if a receive operation is successful, certain conditions can cause the time
setting to be off by up to one second.
x The watch is designed to update its day setting automatically for the period from
January 1, 2000 to December 31, 2099. Updating of the day setting by signal
reception will no longer be performed starting from January 1, 2100.
x If you are in an area where signal reception is not possible, the watch keeps time
with the precision noted in “Specifi cations” (page E-95).
x The receive operation is disabled under any of the following conditions.
− While power is at Level 2 or lower (page E-16)
− While the watch is in the power recovery mode (page E-17)
− While the watch is in the function sleep state (power saving, page E-19)
− While the watch is not in the Timekeeping Mode
− While a direction reading or Countdown Timer operation is in progress (even if the
watch is in the Timekeeping Mode)
x A receive operation is cancelled if an alarm sounds while it is being performed.
E-30
Note
x The x Second Hand will indicate N (NO) if you have adjusted the time or day
setting manually since the latest receive operation.
To turn auto receive on and off
1. In the Timekeeping Mode, press B. The x Second
Hand will move to Y (YES) or N (NO) to indicate the last
calibration signal receive result.
2. Pull out the crown.
The x Second Hand will perform one full revolution and
then stop at the current on/off setting.
3. Rotate the crown to move the x Second Hand to the
setting you want.
x To turn on auto receive, select Y (YES).
x To turn off auto receive, select N (NO).
4. Push the crown back in to return to the Timekeeping
Mode.

@
Y (YES)
N (NO)