Casio 3390 User Manual

MA0406-EA

Modes and Display Screens

Operation Guide 3390

Each press of the

• 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.

C button sounds a confirmation tone and cycles through available modes in the sequence shown below.

Timekeeping Mode

Changing Display Screen Contents

Each press of the button cycles display contents in the

Button Button

(Light)(Screen Switching)

Button Button

(Mode switching)

Days of the Week

SUN: Sunday MON: Monday TUE: Tuesday WED: Wednesday THU: Thursday FRI: Friday SAT: Saturday

following sequence: Calendar Screen \ Seconds Screen \ Current Time Screen.

Month.Day

PM indicator (no indicator for AM)

Hour

Calendar Screen

Day of the Week

2-second interval

Seconds ScreenCurrent Time Screen

Seconds

Minutes

How a Radio-controlled Watch Works

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-

Watch

wave time calibration signal

Signal data

Time data

Internally

Transmitter

Cesium

atomic

clock

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.

Signal is received using built-in antenna.

Watch decodes received data and converts it to time data.

Decode

Time is adjusted according to time data.

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 standard wave may be interrupted occasionally due to maintenance, lightening, etc.

World Time Mode Alarm Mode

City Code

Current Time in Selected City

Alarm

• Alarm off

Hourly Time Signal

• Hourly Time Signal off

Hand Setting Mode Stopwatch Mode

Mode Indicator

Elapsed Time

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.

• 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

TYO

LAX, DEN, CHI, NYC

Japan Transmitter

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

Fort Collins, Colorado signal

1000km

Locations

Mt. Hagane

(60kHz)

• 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.

500km

1000km

500km

Mt. Otakadoya

(40kHz)

U.S. Transmitter Location

• Under optimum conditions, the calibration signal should be

Transmitter

3000km

1000km

Fort Collins

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.

Location

Reception is difficult and may even be impossible in the locations described below. Avoid such locations when performing signal reception.

• You should think of your watch operating like a radio or TV when it is receiving the calibration signal.

Among or near buildings

Inside a vehicle

(automobile, train, plane, etc.)

In a location where there is radio interference (construction site, airport, etc.)

If you are experiencing problems with reception, move away from the types of locations described above to a location with better reception, and try again.

Near high-voltage lines

Next to a household appliance or office equipment (TV, speaker, fax, computer, cell phone, etc.)

Near mountains

Operation Guide 3390

Receiving the Calibration Signal

There are two methods you can use to receive the time calibration signal.

• Auto receive (Reception is performed automatically at midnight, 2:00, 3:00 and 4:00 each morning.)

•

Manual receive (You initiate reception using a button operation.)

• If reception is not successful for any of the normal auto receive operations shown above, auto receive is performed one more time at 5:00 a.m.

• The watch is set up for auto receive at the factory, so all you need to do is to place it in a location that allows good reception each night.

❚

To position the watch for optimum reception

Remove the watch from your wrist and place it somewhere so its top (12 o’clock side, where the antenna is located) is facing approximately in the direction of the signal transmitter. Keep the watch away from metal objects.

Resin band

Metal band

• Orienting the watch so it is sideways to the transmitter makes it more difficult to receive the signal.

• Do not move the watch while it is receiving the calibration signal.

❚

Time Required for Reception

A calibration signal receive operation takes anywhere from about two to six minutes.

• Note that when “AUTO” (Auto Select) is specified as the transmitter selection mode, signal reception can take up to 12 minutes.

• See “Configuring Auto Receive Settings” for more information.

❚

To perform manual receive

In the Timekeeping Mode, hold

down the

D button for about

two seconds.

• The watch will beep and

reception will start. An indicator will appear on the display to indicate reception conditions.

❚

To interrupt reception

Press the

D button.

• All other buttons besides D are disabled during signal reception.

When reception is successful

The watch terminates reception and adjusts the current time. Next it beeps and then displays the date and time that the adjustment was performed.

Reception Error (ERR Indicator)

The watch does not adjust its current time setting, and displays “ERR” when signal reception is unsuccessful for some reason.

• The watch will return to the Timekeeping Mode automatically if you do not perform any operation for about one or two minutes.

❚

Receive Indicator

The receive indicator cycles from “Unstable” through “Stable” as shown below while reception is in progress. How far it cycles depends on the signal strength. Keep the watch in a location where reception is stable while reception is in progress.

Unstable

• Even under optimum reception conditions, it can take about 10 seconds for reception to stabilize.

• Use the receive indicator to check reception status and to determine the best location for signal reception.

• Note that weather, the time of day, surroundings, and other factors can all affect reception.

Receive Indicator

Stable

❚

To view the last reception date and time

In the Timekeeping Mode, press the

• This causes the display to start cycling through the “ ” screen, last reception date screen, and last reception time screen at two-second intervals.

• To return to the Timekeeping Mode, press the D button again.

• The watch will return to the Timekeeping Mode automatically if

you do not perform any operation for about one or two minutes.

D button.

Last Reception Date

Last Reception Time

Configuring Auto Receive Settings

Use the procedure below to turn auto receive of the time calibration signal on or off. When TYO (Tokyo) is selected as your Home City, you can also specify the transmitter selection mode, which controls which Japanese transmitter signal should be used for time calibration.

• For information about selecting you Home City, see “Configuring Home Time Settings”.

• The initial factory default settings for auto receive are Home City = TYO (Tokyo); Auto Receive = On; Transmitter = AUTO

• The following procedure can be performed only when TYO, LAX, DEN, CHI, or NYC is selected as the Home City.

❚

To configure auto receive settings

1. In the Timekeeping Mode,

• This will cause the display to

• The watch will return to the

2. Hold down the

• This will cause the currently

press the

D button.

start cycling through the last reception date and time screens.

Timekeeping Mode automatically if you do not perform any operation for about one or two minutes.

A button

for about two seconds.

auto receive setting to flash on the display.

3. Press the

4. When the setting is the

• This will exit the setting

• To return to the Timekeeping

• The watch will return to the

D button to

cycle through the available auto receive settings.

way you want, press the

A button.

screen and return to the last reception date and time screens.

Mode, press the D button again.

Timekeeping Mode automatically if you do not perform any operation for about one or two minutes.

Auto Receive Settings when the Home City is TYO

• AUTO

Auto receive turned on with automatic selection of either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz), whichever is strongest.

• 40

Auto receive turned on for the Mt. Otakadoya signal (40kHz).

• 60

Auto receive turned on for the Mt. Hagane signal (60kHz).

• OFF

Auto receive turned off.

Auto Receive Settings when the Home City is NYC, CHI, DEN, or LAX

• ON

Auto receive turned on for the Ft. Collins, Colorado signal.

• OFF

Auto receive turned off.

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