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Casio 5394 - OCW-P1000 Manual

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Operation Guide 5394 (OC)
E-23
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-64).
x The receive operation is disabled under any of the following conditions.
− While power is at Level 2 or lower (page E-13)
− While the watch is in the power recovery mode (page E-13)
− While the watch is in the function sleep state (power saving, page E-15)
− 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-22
To turn auto receive on and off
1. In the Timekeeping Mode, press C. The
2
Second Hand will move to
Y (YES) or N (NO) to indicate the last calibration signal receive result.
2. Pull out the crown.
x The
2
Second Hand will perform one full revolution and then stop at the
current on/off setting.
3. Rotate the crown to move the
2
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 exit the auto receive on and off setting mode.
x If you do not perform any operation with the crown for about two minutes
after pulling it out, crown operations will become disabled. If this
happens, push the crown back in and then pull it out again.

Y (YES)
N (NO)
E-21
To check the result of the latest receive operation
In the Timekeeping Mode, press C. The
2
Second Hand will move to Y (YES)
or N (NO) to indicate the last calibration signal receive result.
x The
2
Second Hand will move to Y if the latest receive operation was
successful, or N if it was not. After about 10 seconds, regular timekeeping
will resume.
x Press C to return to regular timekeeping. The watch will also return
to regular timekeeping if you do not perform any operation for about
10 seconds.
Note
x The
2
Second Hand will indicate N if you have adjusted the time or day
setting manually since the latest receive operation.

E-20
To perform manual receive
1. In the Timekeeping Mode (page E-26), keep C depressed (for about two seconds) as the
2
Second Hand
goes through the following sequence.
x Moves to Y (YES) or N (NO) to indicate the last signal reception result, then to R (READY).
2. The
2
Second Hand indicates the operations the watch is currently performing.
When the 2
2
Second Hand is
pointed here:
It means this:
R (READY)
Watch is setting up for reception.
W (WORK) Reception is in progress.
x If signal reception is unstable, the 2
2
Second Hand may move between
W and R.
x When the receive operation is successful, the watch adjusts the time
setting accordingly, and then resumes regular timekeeping. It does not
adjust the setting if the operation failed.
Note
x To interrupt a receive operation and return to the Timekeeping Mode, press
any button.

E-19
x Signal reception may be diffi cult or even impossible under the conditions described below.
Inside or among
buildings
Inside a vehicle Near household
appliances,
offi ce
equipment, or a
mobile phone
Near a
construction
site, airport, or
other sources of
electrical noise
Near
high-tension
power lines
Among or behind
mountains
3. What you should do next depends on whether you are using Auto Receive or Manual Receive.
x Auto Receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive”
on page E-19 for details.
x Manual Receive: Perform the operation under “To perform manual receive” on page E-20.
Auto Receive
x With Auto Receive, the watch performs the receive operation each day automatically up to six times (up
to fi ve times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according
to the Timekeeping Mode time). When any receive operation is successful, none of the other receive
operations for that day are performed.
x When a calibration time is reached, the watch will perform the receive operation only if it is in the
Timekeeping Mode. The receive operation is not performed if a calibration time is reached while you
are confi guring settings.
E-18
x 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.
− Mainfl ingen (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: 500 kilometers (310 miles)
x As of June 2014, China does not use Daylight Saving Time (DST). If China does go to the Daylight
Saving Time system in the future, some functions of this watch may no longer operate correctly.
x Using this watch in a country covered by a time calibration signal that is different from the countries it
supports may result in incorrect time indication due to local application of daylight saving time (summer
time), etc.
To get ready for a receive operation
1. Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down B for at least two seconds to
enter the Timekeeping Mode.
2. Place the watch in a location where signal reception is good.
12 o’clock
or
x Position the watch as shown in the nearby illustration,
with 12 o’clock pointed towards a window. Make sure
there are no metal objects nearby.
x Signal reception normally is better at night.
x The receive operation takes from two to 10 minutes, but
in some cases it can take as long as 20 minutes. Take
care that you do not perform any button operation or
move the watch during this time.
E-17
Approximate Reception Ranges
Japanese Signals Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainfl ingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
E-16
Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. However, when
using the watch outside of areas covered by time calibration signals, you will have to adjust the settings
manually as required. See “Confi guring Current Time and Day Settings Manually” (page E-30) for more
information.
This section explains how the watch updates its time settings when the city code selected as the Home
City is in Japan, North America, Europe, or China, and is one that supports time calibration signal
reception.
If your Home City Code setting is this:
The watch can receive the signal from the transmitter
located here:
LON (LONDON), PAR (PARIS), ATH (ATHENS) Anthorn (England), Mainfl ingen (Germany)
HKG (HONG KONG) Shangqiu City (China)
TYO (TOKYO) Fukushima (Japan), Fukuoka/Saga (Japan)
HNL (HONOLULU), ANC (ANCHORAGE),
LAX (LOS ANGELES), DEN (DENVER),
CHI (CHICAGO), NYC (NEW YORK)
Fort Collins, Colorado (United States)
Important!
x The areas covered by HNL (HONOLULU) and ANC (ANCHORAGE) are quite far from the calibration
signal transmitters, so certain conditions may cause reception problems.
3


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