Casio 5135 Operation Manual page 2

Operation Guide 5135
4. Press A to exit the setting screen.
• Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive
operation (in the middle of the night). You also can perform manual receive or you
can set the time manually.
• 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 city codes and transmitters, see
"Important!" under "Time Calibration Signal Reception" and "Transmitters".
• See the maps under "Approximate Reception Ranges" for information about the
reception ranges of the watch.
• You can disable time signal reception, if you want. See "To turn auto receive on and
off" for more information.
• Under factory default settings, auto receive is turned off for all of the following city
codes: HNL (Honolulu) and ANC (Anchorage). For details about turning on auto
receive for these city codes, see "To turn auto receive on and off".
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
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. 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 12 o'clock side pointing towards a window.
This watch is designed to receive a time calibration signal late at night. Because of
this, you should place the watch near a window as shown in the illustration when you
take it off at night. Make sure there are no metal objects nearby.
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or Inside a Near
among vehicle household
buildings appliances,
office
equipment,
or a mobile
phone
• Signal reception normally is better at night than during the day.
• Time calibration signal reception takes from three to eight minutes, but in some
cases it can take as long as 16 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.
Home City Code Transmitter
Anthorn (England)
LON, PAR, ATH
Mainflingen (Germany)
HKG Shangqiu City (China)
Fukushima (Japan)
TYO
Fukuoka/Saga (Japan)
HNL*, ANC*, LAX, Fort Collins, Colorado
DEN, CHI, NYC (the United States)
* The areas covered by the HNL and ANC 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 operation is in
progress.
Approximate Reception Ranges
U.K. and German Signals
1,500 kilometers
Anthorn
500 kilometers
The Anthorn signal
is receivable within
this area.
12 o'clock
or
Near a Near high- Among or
construction tension power behind
site, airport, lines mountains
or other
sources of
electrical
noise
Frequency
60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Mainflingen
U.S. Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Japan Signals
500 kilometers
Fukuoka/Saga
1,000 kilometers
1,500 kilometers
500 kilometers
Chengdu
Shangqiu
• Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference also may 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: 1,500 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
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LON Standard Time 1:00 am 2:00 am
Daylight Saving Time 2:00 am 3:00 am
PAR Standard Time 2:00 am 3:00 am
Daylight Saving Time 3:00 am 4:00 am
ATH Standard Time 3:00 am 4:00 am
Daylight Saving Time 4:00 am 5:00 am
HKG Standard Time and 1:00 am 2:00 am
Daylight Saving Time
TYO Standard Time Midnight 1:00 am
HNL Standard Time and Midnight 1:00 am
ANC Daylight Saving Time
LAX
DEN
CHI
NYC
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.
• 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.
To perform manual receive
1. While in the Timekeeping Mode or Battery/Receive
Receiving
Mode, hold down C for about two seconds.
• The second hand will move to READY (R) and signal
reception will start.
• The digital display will go blank at this time.
• The second hand will indicate the current reception
status.
READY (or R) : Unstable
WORK (or W) : Stable
• Keep the watch in a location where reception is stable
while a receive operation is in progress.
• Signal reception takes from three to eight minutes, but
READY (or R)
in some cases it can take as long as 16 minutes. Take
care that you do not perform any button operations or
move the watch during this time.
• Even under optimum reception conditions, it can take about 30 seconds for
reception to stabilize.
• Check the second hand position to find out the status of a receive operation and to
determine the best location for signal reception.
• Note that weather, the time of day, surroundings, and other factors all can affect
reception.
Note
To cancel an ongoing signal receive operation, press any button.
When reception is successful
• "GET" appears when reception is complete, and the
Receive successful
watch adjusts its current time setting.
• To return to the Timekeeping Mode after "GET" appears,
press B or C, or do not perform any operation for one
or two minutes.
• The receive successful indicator is displayed after a
successful receive operation.
Receive successful indicator
500 kilometers
Fukushima
1,000 kilometers
China Signal
Changchun
Beijing
Shanghai
Hong Kong
Auto Receive Start Times
3 4 5 6
3:00 am 4:00 am 5:00 am Midnight*
4:00 am 5:00 am Midnight* 1:00 am*
4:00 am 5:00 am Midnight* 1:00 am*
5:00 am Midnight* 1:00 am* 2:00 am*
5:00 am Midnight* 1:00 am* 2:00 am*
Midnight* 1:00 am* 2:00 am* 3:00 am*
3:00 am 4:00 am 5:00 am
2:00 am 3:00 am 4:00 am 5:00 am
2:00 am 3:00 am 4:00 am 5:00 am
*Next day
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