MA0406-EA

Operation Guide 3390

Modes and Display Screens

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.

Timekeeping Mode
World Time Mode

City Code

Alarm Mode

Alarm

Hourly Time Signal

(Screen Switching)

(Light)

Button

Button

Button

Button

(Mode switching)

 

Changing Display Screen Contents

Each press of the button cycles display contents in the following sequence: Calendar Screen \ Seconds Screen \ Current Time Screen.

 

Calendar Screen

Month.Day

Day of the Week

2-second interval

Current Time

in Selected City

• Alarm off

• Hourly Time Signal off

Hand Setting Mode
Stopwatch Mode

 

 

Current Time Screen

Seconds Screen

 

 

PM indicator

 

 

Days of the Week

(no indicator for AM)

Seconds

 

 

 

SUN: Sunday

MON: Monday

TUE: Tuesday

 

 

WED: Wednesday

THU: Thursday

FRI: Friday

 

 

SAT: Saturday

 

Hour

Minutes

 

 

 

 

Mode Indicator

Mode Indicator

Elapsed Time

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 Time setting.

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.

 

Long-

Signal is received

Transmitter

wave time

using built-in antenna.

calibration

 

 

 

 

signal

 

 

 

Watch decodes

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.

•For information about selecting a Home City, see “Configuring Home Time Settings”. For information about city codes, see the “World Time City Code List”.

Home City

Transmitter

 

 

TYO

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

 

 

LAX, DEN, CHI, NYC

Fort Collins, Colorado signal

 

 

 

 

 

received data

 

 

Signal data

and converts it

 

 

to time data.

 

 

 

 

 

Decode

 

Cesium

 

Time data

Time is adjusted

atomic

Watch

Internally

according to time

clock

data.

 

 

Note that transmission of the standard wave may be interrupted occasionally due to maintenance, lightening, etc.

Japan Transmitter

1000km

Locations

 

 

500km

 

Mt. Otakadoya

500km

(40kHz)

Mt. Hagane (60kHz)

U.S. Transmitter
Location

3000km

1000km

Fort Collins

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.

1000km

•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.

•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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