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Casio 2456 User Manual page 2

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Note
• To interrupt a receive operation and return to the Timekeeping screen, press
D.
• If the receive operation is unsuccessful, the message "ERR" appears on the
Last Signal screen for about one or two minutes. After that, the watch returns
to the Timekeeping screen.
• You can also change from the Last Signal screen to the Timekeeping screen
by pressing D.
About the Receive Indicator
The receive 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.
Weak
• Even in an area where signal strength is strong, it takes about 10 seconds for
signal reception to stabilize enough for the receive indicator to indicate signal
strength.
• Use the receive indicator as a guide for checking signal strength and for
finding the best location for the watch during signal receive operations.
• The receive indicator remains on the display in all modes following reception
of the time calibration signal and calibration of the watch's time setting. The
receive indicator does not appear if signal reception was unsuccessful or
after manual adjustment of the current time setting.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the
time calibration signal when the digital time in the Timekeeping Mode reaches
2:00 AM, 4:00 AM, and 6:00 AM each day (calibration times).
Note
• The Auto Receive operation is performed only if the watch is in the
Timekeeping Mode or World Time Mode when one of the calibration times is
reached. It is not performed if the calibration time is reached while you are
making settings (while settings are flashing on the display).
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the digital 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 easily receive the signal.
• The receive indicator (
) indicates that one, two, or all three of the last
calibration time reception attempts were successful.
• When auto receive is turned on, the watch receives the calibration signal for
four to 11 minutes each day when the digital time reaches 2:00 AM, 4:00 AM,
and 6:00 AM. Do not operate any of the watch's buttons within 15 minutes
prior to or following the calibration times. Doing so can interfere with correct
calibration.
• Remember that reception of the calibration signal depends on the time
shown on the digital display. The receive operation will be performed
whenever the digital display shows 2:00 AM, 4:00 AM, and 6:00 AM,
regardless of whether or not the displayed time is actually the correct time.
• When two or three receptions are successful, the watch uses the data of the
last reception for calibration. When only one reception is successful, the
watch uses the data of the successful reception.
To turn auto receive on and off
1. In the Timekeeping Mode, hold down A until the
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2. Press D to toggle Auto Receive on (ON) and off
(OFF).
3. Press A to exit the setting screen.
USER'S GUIDE 2456
Strong
Alarms
Alarm time
You can set three independent Daily Alarms, and
Alarm number
even input text that appears on the display to remind
you of the purpose of each alarm. When an alarm is
turned on, the alarm tone sounds when the alarm
time is reached. You can also turn on an Hourly Time
Text
Signal that causes the watch to beep twice every
hour on the hour.
• The remaining time shows the amount of time from
the current time (Timekeeping Mode time) until the
alarm time whose screen is on the display.
• The alarm number ("AL1" though "AL3") indicates
an alarm screen. "SIG" appears in place of the
alarm number when the Hourly Time Signal screen
is shown.
• All of the operations in this section are performed in
Remaining time (Hours :
the Alarm Mode, which you enter by pressing C
Minutes Seconds)
(page
E-4).
To view Alarm Mode screen
In the Alarm Mode, use B and D to cycle through the alarm screens as
shown below.
Press D.
AL1
AL2
Press B.
• Displaying an alarm time shows any text assigned to it for about two seconds
(or a blank screen if no text is assigned), followed by the remaining time
screen.
• Your watch comes preset with the text data "LUNCH" and an alarm time of
12:00PM (noon) for alarm AL1. You can use this setting as it is or change it
to something else.
To set an alarm
1. In the Alarm Mode, use B and D to select the
alarm whose time you want to set.
2. Hold down A until the flashing cursor appears on
the display, which indicates the setting screen.
• This automatically turns on the alarm.
• Holding down L for about two seconds at this
time sets an alarm time of 12:00AM, without
assigning any text to the alarm.
Cursor
3. Press C to move the flashing in the sequence
shown below to select other settings.
Text
Hour
• There are eight spaces in the text, so you have to press C eight times to
move to the Hour setting.
4. When the setting you want to change is selected, use B and D to change it.
• Selecting the text causes the text input cursor to appear.
• When inputting text, use B and D to cycle through characters at the
current cursor location, and C to move the cursor to the right. See
"Inputting Text" on page E-39.
• While the hour or minute setting is flashing, use D (+) and B (–) to
change it.
• When setting the alarm time using the 12-hour format, take care to set the
time correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Note
• Use the above procedure to edit alarm settings, too.
Alarm Operation
The alarm sounds at the preset time for about 20 seconds, or until you stop it
by pressing any button.
• Alarms and the Hourly Time Signal sound in all modes. To view text assigned
to alarms and the remaining time, however, you must enter the Alarm Mode.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use B and D to select an alarm or the Hourly Time
Signal.
2. When the alarm or the Hourly Time Signal you want to is selected, press A
to turn it on and off.
Note
• The on/off status of an alarm is indicated on the corresponding alarm screen
(AL1 through AL3). The symbol
indicates an alarm is turned on, while
absence of the
symbol indicates the alarm is turned off.
• The on/off status of the Hourly Time Signal is indicated on the SIG screen.
The symbol
along with the message "ON" indicates the Hourly Time Signal
is turned on, while the message "OFF" without the
turned off.
• The alarm on indicator and the Hourly Time Signal on indicator are shown on
the display in all modes while these functions are turned on.
• If any alarm is on, the alarm on indicator is shown on the display in all
modes.
AL3
SIG
Minutes
symbol indicates it is
2

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