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Operation Guide 3779 4306
1
MO0507-EA
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully and keep it on hand for later reference
when necessary.
Before using the watch for the first time...
Some watches are sent from the factory with the second
hand stopped at 12 o’clock. Press the B button to start
the second hand.
About This Manual
Button operations are indicated using the letters shown
in the illustration.
Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
Hour hand
Minute hand
Second hand
Press A.
Timekeeping Mode Receive Result Mode Home Position
Adjustment Mode
Press B.
Hold down A and B
for about five seconds.
Manual Setting Screen
Press B.
Hold down B for about five
seconds, then press B twice.
General Guide
This watch is designed so the function of a button is executed when you release the
button, not when you press it.
Use A and B to change from mode to mode as shown below.
Radio-controlled Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly.
The time calibration signal includes both Standard Time and Daylight Saving Time
(summer time) data.
This watch is designed to pick up the time calibration signal transmitted in Germany
(Mainflingen), England (Rugby), and the United States (Fort Colllins).
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration
signal. You also can perform a manual procedure to set the time when necessary.
The first thing you should do after purchasing this watch is to specify your Home
Time Zone, which is the time zone where you normally will use the watch. For more
information, see To specify your Home Time Zone below.
When using the watch outside the range of the time signal transmitters, you will have
to adjust the current time setting manually as required. See Timekeeping for more
information about manual time settings.
To specify your Home Time Zone
1. In the Timekeeping Mode, hold down B for about five
seconds until the second hand moves to the hour
marker that corresponds to the currently selected time
zone (see below) and stops. This is the setting mode.
The GMT differential indicates the time difference in
hours between Greenwich Mean Time and the
applicable time zone, as described in the table below.
2. Press A to move the second hand to the hour marker
for the time zone you want to select as your Home Time
Zone.
London (GMT+0)*1 12 oclock
Move the second hand to here:To select this time zone:
Paris, Berlin, Milan, Rome, Amsterdam,
Hamburg, Frankfurt, Vienna, Barcelona,
Madrid (GMT +1)*1
9 oclock
2 oclock
Tokyo, Seoul, Pyongyang (GMT +9)
Athens (GMT +2)*1
1 oclock
*1 Also enables reception of European time calibration signals (Germany and U.K.)
*2 Also enables reception of North American time calibration signal.
3. Press B three times to exit the setting mode.
The watch will also return to the Timekeeping Mode if you do not perform any
operation for about three minutes.
Normally, your watch should show the correct time as soon as you exit the Home
Time Zone setting screen. If it does not, it should adjust automatically after the next
auto receive operation (in the middle of the night). You can also perform manual
receive or you can set the time manually.
New York, Detroit, Miami, Boston (GMT 5)*2
Chicago, Houston, Dallas/Fort Worth, New
Orleans (GMT 6)*2
Denver, El Paso, Culiacan (GMT 7) *2
Los Angeles, San Francisco, Las Vegas,
Seattle/Tacoma, Tijuana (GMT 8) *2
None (auto receive disabled)
5 oclock
6 oclock
7 oclock
8 oclock
11 o'clock
Even if the time calibration signal is received correctly, there are some times when
the analog hands may not indicate the correct time. If this happens, use the
procedures under Adjusting the Home Positions to check the home positions of the
hands, and make adjustments as required.
The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between time zones (GMT differential values) and
transmitters, see Transmitters.
See the maps under Reception Ranges for information about the reception ranges
of the watch.
You can disable time signal reception, if you want. See To turn off time calibration
signal reception for more information.
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
five 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 6 oclock side facing towards a window.
Make sure there are no metal objects nearby.
6 oclock
The watch should not be facing the wrong way.
Proper signal reception can be difficult or even impossible under the conditions listed
below.
Signal reception is normally 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 10 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
In Europe, this watch can receive either the Germany (Mainflingen) or England
(Rugby) time calibration signal. See Transmitters for more information.
Reception Ranges
Rugby
Mainflingen
1,500 kilometers
500 kilometers
Fort Collins
Approximately
3,000 kilometers
(2,000 miles)
Approximately
900 kilometers
(600 miles)
Under good conditions, the signal reception range is approximately 1,500 km (930
miles) from the German or U.K. transmitter, and approximately 3,000 km (2,000
miles) from the U.S. transmitter.
At distances greater than 500 km (310 miles) from the German or U.K. transmitter,
and approximately 900 km (600 miles) from the U.S. transmitter, signal reception
may not be possible at certain times of the day and during certain periods of the
year. Radio interference may also cause problems with reception.
See the information under Signal Reception Troubleshooting if you experience
problems with time calibration signal reception.
1


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