Casio Watch Casio Gwm850-1 Watch User Manual

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Operation Guide 3155
2
• 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.
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
* The areas covered by the HNL, ANC, and MOW city codes are quite far from the
time calibration signal transmitters, and so certain conditions may cause
problems with signal reception.
• Calibration signal reception is disabled while a countdown timer/target time
operation is in progress.
Home City Code
LON, PAR, BER, ATH,
LIS, MAD, ROM, STO, MOW*
HKG, BJS
TPE, TYO, SEL
HNL*, ANC*, LAX, DEN,
CHI, NYC, YVR, YEA, MEX,
MIA, YTO, YHZ, YYT
Frequency
60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Anthorn (England)
Mainflingen (Germany)
Shangqiu City (China)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Approximate Reception Ranges
U.K. and German Signals
Anthorn
1,500 kilometers
500 kilometers
The Anthorn
signal is
receivable within
this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Mainflingen
Fort Collins
U.S. Signal
Japan Signals
Signals are receivable in the Taiwan area when reception conditions are good.
1,000 kilometers1,000 kilometers
Fukuoka/Saga
500 kilometers
Fukushima
500 kilometers
500 kilometers
1,500 kilometers
Shanghai
Hong Kong
Chengdu
Shangqiu
China Signal
Changchun
Beijing
• Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference may also cause problems with reception.
Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310
miles)
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
Shangqiu (China) transmitter: 1500 kilometers (910 miles)
• 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 6 times a day
(5 times a day for the Chinese calibration 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.
Your Home City
Auto Receive Start Times
123456
Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight*
Daylight 2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am*
Saving Time
Standard Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am*
Daylight 3:00 am 4:00 am 5:00 am Midnight* 1:00 am* 2:00 am*
Saving Time
LON,
LIS
PAR,
BER,
MAD,
ROM,
STO
Standard Time 3:00 am 4:00 am 5:00 am Midnight* 1:00 am* 2:00 am*
Daylight 4:00 am 5:00 am Midnight* 1:00 am* 2:00 am* 3:00 am*
Saving Time
Standard Time 4:00 am 5:00 am Midnight* 1:00 am* 2:00 am* 3:00 am*
Daylight 5:00 am Midnight* 1:00 am* 2:00 am* 3:00 am* 4:00 am*
Saving Time
Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
and Daylight
Saving Time
Standard Time Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
ATH
MOW
HKG,
BJS
TYO,
TPE,
SEL
Your Home City
Auto Receive Start Times
123456
Standard Time Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
and Daylight
Saving Time
*Next day
HNL,
ANC,
LAX,
DEN,
CHI,
NYC,
YVR,
YEA,
MEX,
MIA,
YTO,
YHZ,
YYT
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 receive 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 seven minutes everyday when
the time in the Timekeeping Mode reaches a calibration time. Do not perform any
button operation within seven minutes before or after 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. The receive operation will be performed whenever the display
shows any one of the calibration times, regardless of whether or not the displayed
time actually is the correct time.
About the Signal Strength Indicator
The signal strength indicator shows the strength of the calibration signal being
received. For best reception, be sure to keep the watch in a location where signal
strength is strongest. The signal strength indicator is displayed while an auto or
manual receive operation is in progress.
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the signal strength indicator to indicate signal
strength.
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Signal strength indicator
Settings updated indicator
Strong
(Level 3)
Weak
(Level 1)
• Use the signal strength indicator as a guide for checking signal strength and for
finding the best location for the watch during signal receive operations.
• Following reception of the time calibration signal and calibration of the watch’s time
setting, the settings updated indicator will remain on the display in all modes. The
settings updated indicator will not be displayed if signal reception was unsuccessful
or after you adjust the current time setting manually.
• The settings updated indicator is displayed only when the watch is able to receive
both time and date data successfully. It does not appear when only time data is
received.
• The settings updated indicator indicates that at least one of the auto calibration
signal receive operations was successful. Note, however, that the settings updated
indicator disappears from the display each day when the first auto receive operation
of the day is performed.
To perform manual receive
1.Enter the Timekeeping Mode.
2.Hold down D for about two seconds until
starts to
flash on the display.
• Time calibration signal reception takes from two to
seven minutes. Take care that you do not perform any
button operations or move the watch during this time.
• If the receive operation is successful, the reception
date and time appear on the display, along with the
GET indicator.
3.After manual receive is complete, press D to return to
the Timekeeping mode.
• The watch also will exit the Receive Mode if you do not
perform any button operation for about one or two
minutes.
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Receiving
Receive successful
• If the latest reception fails but a previous reception was
successful, an indicator (
) will be on the display.
The watch will enter the Receive Mode without changing
the time setting if you press D or if you do not perform
any button operation for about one or two minutes.
Note
• To interrupt a receive operation and return to the
Receive Mode, press D.
Receive failed
If there was a previously
successful reception
If no reception was
successful

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