Casio Casio 3760 MA0410-EA User's Manual

Casio Watches User's Manual - Casio 3760 MA0410-EA.
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Operation Guide 3760

1

MA0410-EA

Each press of the C button sounds a confirmation tone and cycles through available modes in the sequence shown below.
• The display will automatically revert to the Timekeeping screen if you leave the Alarm or Hand Setting screen displayed without performing

any operation for about two or three minutes.

World Time Mode

Alarm Mode

Hand Setting Mode

Stopwatch Mode

Current Time in Selected City

City Code

Alarm

•  Alarm off

Hourly Time Signal

•  Hourly Time Signal off

Mode Indicator

Mode Indicator

Elapsed Time

Timekeeping Mode

Days of the Week
SUN: Sunday 

MON: Monday  TUE: Tuesday  

WED: Wednesday  THU: Thursday  FRI: Friday  
SAT: Saturday

(Light)

(Screen Switching)

(Mode switching)

Changing Display Screen Contents
Each press of the 

 button cycles display contents in the 

following sequence: Day of the Week 

➡ Date ➡ Seconds ➡ 

Current Time

Day of the week

PM indicator 
(no indicator for AM)

Seconds Screen

Current Time Screen

Day of the week

Date

 Button

 Button

 Button

 Button

Month/Day

Seconds

Minutes

Hour

Modes and Display Screens

What is a radio-controlled watch?
Your radio-controlled watch is designed to receive a time
calibration signal that contains standard time data, and adjust its
current time setting accordingly.

Signal data

Transmitter

Internally

Decode

Watch

Time data

Long-wave 
time 
calibration 
signal

Cesium 

atomic clock

Signal is received 
using built-in antenna.

Watch decodes 
received data 
and converts it 
to time data.

Time is adjusted 
according to 
time data.

After the watch receives the Standard Time signal, it performs
internal calculations to determine the current time. Because of
this, there may be an error of up to one second in the
displayed time.

Calibration Signal
• The Japanese calibration signal (Call Sign: JJY) is maintained by

the National Institute of Information and Communications
Technology (NICT). It is a long wave signal transmitted 24 hours a
day from the Mt. Otakadoya transmitter (40kHz) located in
Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane
transmitter (60kHz) located on the border between Saga
Prefecture and Fukuoka Prefecture.

• The U.S. calibration signal (Call Sign: WWVB) is transmitted by

the National Institute of Standards and technology from Fort
Collins, Colorado.

Note that transmission of the time calibration signal may be
interrupted occasionally due to maintenance, lightning, etc.

How a Radio-controlled Watch Works

Reception Range
This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB). The signal that is
received depends on the current Home City setting.
• For information about selecting a Home City, see “Configuring Home City Settings”. For information about city codes, see the “World Time

City Code List”.

Home City

TYO

LAX, DEN, CHI, NYC

Transmitter

Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)

Fort Collins, Colorado signal

1000km

Mt. Hagane

(60kHz)

Mt. Otakadoya

(40kHz)

500km

1000km

500km

Japan Transmitter 
Locations

• Under optimum conditions, the calibration signal should be

receivable up to 1,000 kilometers from the transmitter.
Note that the wave is relatively weak at distances greater
than 500km, so reception may be poor at long distances.

U.S. Transmitter 
Location

3000km

1000km

Fort Collins

• Under optimum conditions, the calibration signal should be

receivable up to 3,000 kilometers from the transmitter.
Note that the wave is relatively weak at distances greater
than 1,000km, so reception may be poor at long distances.

• Geographic contours, nearby buildings, seasonal conditions, the time of day, can even make reception impossible even when you are within

range of the transmitter.

• Best reception is possible late at night.

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