Casio QW-2973 Specifications download pdf (Page 5)

Operation Guide 5410

E-39

x Signal reception may not be possible at the distances noted below during certain times of the year or

day. Radio interference may also cause problems with reception.

− Mainﬂ ingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)

− Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)

− Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)

− Shangqiu (China) transmitter: 500 kilometers (310 miles)

E-38

Approximate Reception Ranges

Japanese Signals Chinese Signal

1,500 kilometers

Changchun500 kilometers

Beijing

Shangqiu

Shanghai

Chengdu

Hong Kong

UK and German Signals North American Signal

Anthorn

500 kilometers

1,500 kilometers

Mainﬂ ingen

The Anthorn signal is receivable

within this area.

Fukushima

500 kilometers

1,000 kilometers

Fukuoka/

Saga

Tokyo

2,000 miles

(3,000 kilometers)

600 miles

(1,000 kilometers)

DenverLos Angeles

Fort Collins

Chicago

New York

E-37

x Reception normally takes anywhere from about two to ten minutes, but it can take as long as

20 minutes.

x When the receive operation is successful, the time and date settings will be adjusted automatically.

x Once a signal receive operation is successful, no more Auto Receive operations are performed that

day. See “To check receive operation results (acquisition results)” (page E-40).

Time Calibration Signal Reception Ranges and Conditions

If your Home City (Time Zone) setting is this:

The watch can receive the signal from the transmitter

located here:

LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainﬂ ingen (Germany)

HONG KONG (HKG) Shangqiu City (China)

TOKYO (TYO) Fukushima (Japan), Fukuoka/Saga (Japan)

NEW YORK (NYC), CHICAGO (CHI),

DENVER (DEN), LOS ANGELES (LAX)

Fort Collins, Colorado (United States)

E-36

Timekeeping (by Time Calibration Signal)

Appropriate Signal Reception Location (Time Calibration Signal)

x Keep the watch away from metal and position it so its

12 o’clock side is facing a window. Avoid moving the

watch as much as possible and do not perform any watch

operations while a signal receive operation is in progress.

x You may experience time calibration signal reception

problems in the areas described below.

− Among or near buildings

− While riding in a vehicle

− Near household appliances, ofﬁ ce machines, mobile

phones, etc.

− On a construction site, in an airport, or any other location where radio wave interference occurs

− Near high-voltage lines

− In mountainous areas or behind a mountain

Normal Daily Time Adjustment (Time Calibration Signal)

Time Calibration Signal Auto Receive

A time calibration signal receive operation will be performed automatically if the watch’s current Home City

(time zone) is one that supports reception.

x Leave the watch in a location that is appropriate for time calibration signal reception between the hours

of midnight and 5:00 a.m. See “Appropriate Signal Reception Location (Time Calibration Signal)” (page

E-36).

x The

Second Hand will point to RC while time calibration signal reception is in progress.

12 o’clock

E-35

Leap Seconds

A GPS signal received on or around June 1 or December 1 each year may also include leap second

information.

x A receive operation can take as long as 13 minutes when leap second information is included.

x Once leap second information is successfully received, the watch will not make any attempt to receive

it again until the next leap second information is sent (the following June 1 or December 1).

Leap second information may also be received under the conditions described below.

− After a long period has elapsed since the last GPS signal receive operation

− When a previous leap second receive operation failed

(The watch will continue to attempt the leap second information receive operation until it is

successful.)

E-34

Triggering an Immediate Time Adjustment Operation

Receiving GPS Time Information

Perform this operation when you suspect that the time normally indicated by the watch is not correct.

x This operation requires large amounts of power. Perform it only when necessary.

Perform this operation in the Timekeeping Mode (not in the Airplane Mode). See “Mode Reference

Guide” (page E-42).

1. Move to a location appropriate for signal reception and orient the watch so its display is pointed straight

up at the sky. See “Appropriate Signal Reception Location (GPS Signal)” (page E-29).

2. Hold down B for at least one second. Release the button as soon as the

Second Hand points to T (TIME).

x The time information receive operation starts when the

Second Hand

moves to T (TIME). Even if the

Second Hand is pointed at Y (YES) or N

(NO), keep B depressed until it moves to T (TIME).

x Reception normally takes anywhere from seven seconds to one minute. It

can take as long as 13 minutes when leap second information is included.

See “Leap Seconds” (page E-35).

x If the receive operation is successful, the

Second Hand will move to Y

(YES) and then the time and date settings will change in accordance with

the Home City (Time Zone) and summer time settings.

x If the receive operation fails, the

Second Hand will move to N (NO) and

then normal timekeeping will resume with settings unchanged.

E-33

GPS signal time information is received automatically whenever all of the conditions described below are

satisﬁ ed.

x The current time is between 6:00 a.m. and 10:00 p.m.

x The face of the watch has been exposed for about one or two minutes to continuous light equivalent to

the brightness near a window on a clear day.

x All time calibration signal receive operations performed during the previous night were unsuccessful.

After exiting the Airplane Mode, position information will be acquired automatically from GPS when the

conditions below are satisﬁ

ed.

x The time is between 6:00 a.m. and 10:00 p.m.

x The face of the watch is exposed for about one or two minutes to continuous light equivalent to the

brightness near a window on a clear day.

x Time information reception takes anywhere from about seven seconds to one minute. It can take as

long as 13 minutes when leap second information is received.

x Position information reception takes anywhere from about 30 seconds to two minutes. It can take as

long as 13 minutes when leap second information is received. See “Leap Seconds” (page E-35).

x When the receive operation is successful, the time and date settings will be adjusted automatically.

x Once a signal receive operation is successful, no more Auto Receive operations are performed that

day. See “To check receive operation results (acquisition results)” (page E-40).

E-32

Note

x After exiting the Airplane Mode, the watch will automatically start a position information acquisition

operation when it is exposed for about one or two minutes to continuous light equivalent to the

brightness near a window on a clear day anytime between 6:00 a.m. and 10:00 p.m. See “Using the

Watch in an Aircraft (Airplane Mode)” (page E-45).

x You may experience location information acquisition problems when you are in the vicinity of a time

zone borderline. The watch’s time and date settings will not be correct if the Home City (Time Zone)

that is automatically set after position information acquisition is not right for your location. Perform the

position information acquisition operation in a representative city in your time zone or in a location that

is well within the time zone. Or you can perform a time information receive operation to change time

and date settings after conﬁ

guring Home City (Time Zone) and summer time setting manually (using

button and crown operations).

See “To conﬁ gure Home City (time zone) settings” (page E-59), “STD/DST Switching” (page E-60), and

“Receiving GPS Time Information” (page E-34).

Normal Daily Time Adjustment (GPS Signal)

GPS Signal Auto Receive

GPS signal time information is received automatically in accordance with your current Home City (time

zone) setting.

Perform the signal receive operation in the Timekeeping Mode (not in the Airplane Mode). See “Mode

Reference Guide” (page E-42).

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Operation Guide 5410 1

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Casio QW-2973 Specifications Page 5

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