Operation Guide 3334

Specifying the Illumination Duration 3.

1. In the Timekeeping Mode, hold down A for about one second until the city code starts to flash in the bottom dial. This is the setting screen.

4.

City Code

Press the B button to toggle the illumination duration between about 1.5 seconds ( in the bottom dial) and 2.5 seconds ( in the bottom dial).

After the setting is the way you want, press the A button to exit the setting screen.

2. Press the C button three times to move the flashing to the seconds count in the left dial.

• The watch will also exit the setting screen automatically if you

Seconds

do not perform any operation for about two or three minutes.

 

(3 times)

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.

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 is received using

TransmitterLong-wavebuilt-in antenna. Calibration Signal

Calibration Signal

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

the independent Japan Ministry of Posts and Telecommunications

Communication Research Laboratory (CRL). 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

•For information about selecting a Home City, see “Manually Setting the Time and Date”. For information about city codes, see the “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

 

 

Watch decodes received data and

Signal Data converts it to time data.

 

Decode

 

Cesium

Time Data

Time is adjusted

 

according to time

Atomic Clock Watch

Internally

data.

 

 

After the watch receives the time calibration 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.

Collins, Colorado.

Though the calibration signal is normally transmitted 24 hours a day, transmission may be interrupted occasionally due to maintenance, lightening, etc.

Transmitter Location

 

1000km

500km

 

Mt. Otakadoya

500km

(40kHz)

 

 

Mt. Hagane

(60kHz)

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.

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, the season, 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.

3