Casio 2696 Kullanım Kılavuzu - Sayfa 3

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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.

Signal is received

using built-in antenna.

Long-wave

Transmitter

time

calibration

signal

Watch decodes

received data

and converts it to

Signal data

time data.

Decode

Time data

Time is adjusted

Cesium

according to time

atomic clock

Internally

Watch

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.

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

Near high-voltage lines

Inside a vehicle (automobile,

Next to a household appliance

or office equipment (TV,

train, plane, etc.)

speaker, fax, computer, cell

phone, etc.)

In a location where there is

Near mountains

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.

Operation Guide 2696/2832 ( B )

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

Collins, Colorado.

Note that transmission of the standard wave may be

interrupted occasionally due to maintenance, lightening, etc.

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, 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.

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 "Selecting Your Home City". For information about city codes, see the "World Time City

Code List".

Home City

TYO

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

LAX, DEN, CHI, NYC

Fort Collins, Colorado signal

1000km

Transmitter Location

Mt. Otakadoya

500km

(40kHz)

500km

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.

• 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.

❚ Time Required for Reception

A calibration signal receive operation takes anywhere from about

two to six minutes.

• Note that when "FREQ.A" (Auto Select) is specified as the

transmitter selection mode, signal reception can take up to 12

minutes.

• See "Configuring Transmitter Selection Mode Settings" for more

information.

❚ To perform manual receive

Receive icon

Hold down the D

D button for

about two seconds.

• The watch will beep and

reception will start. The "

" icon

flashes on the display while

signal reception is in progress.

Receiving Indicator

❚ To interrupt reception

D button.

Press the D

• 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 the adjustment was performed.

• The "

" icon on the display also indicates successful signal reception.

The "

" icon is cleared from the display each day at 3:00 a.m.

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 display will return to the normal timekeeping screen automatically

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

Transmitter

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.

❚ Receive Icon

The receive icon cycles from

Receive Icon

"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

Stable

• Even under optimum reception conditions, it can take about 10

seconds for reception to stabilize.

• Use the receive icon 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.