Manual Casio G-Shock GWG-100-1AER Watch

Manual

Operation Guide 5561

E-29

x If the current reception fails but a previous reception

(within the last 24 hours) was successful, RCVD

and ERR will be displayed. If only ERR is displayed

(without RCVD), it means that all of the receive

operations over the past 24 hours have failed. The

watch will return to the Timekeeping Mode without

changing the time setting if you press D or if you do

not perform any button operation for about one or

two minutes.

Note

x To interrupt a receive operation and return to the

Timekeeping Mode, press any button.

If there was a previously

successful reception

Receive failed

E-28

x If the receive operation is successful, the reception

date and time will appear. The watch will return to

the Timekeeping Mode if you press D or if you do

not perform any button operation for about one or

two minutes.

Receive successful

RCVD indicator

E-27

x You can use the procedure under “To enable or disable auto receive” (page E-32) to

enable or disable auto receive.

To perform manual receive

In the Timekeeping Mode, hold down D until the watch

beeps.

x A signal level indicator (page E-30) appears after reception

starts. Do not move the watch or perform any button

operation until GET or ERR appears.

Signal level indicator

Receiving

E-26

3. What you should do next depends on whether you are using Auto Receive or

Manual Receive.

x Auto Receive: Leave the watch over night in the location you selected in step 2.

See “Auto Receive” below for details.

x Manual Receive: Perform the operation under “To perform manual receive” on

page E-27.

Auto Receive

x With Auto Receive, the watch performs the receive operation each day

automatically up to six times (up to five times for the Chinese calibration signal)

between the hours of midnight and 5 a.m. (according to the Timekeeping Mode

time). When any receive operation is successful, none of the other receive

operations for that day are performed.

x When a calibration time is reached, the watch will perform the receive operation

only if it is in the Timekeeping Mode or World Time Mode. The receive operation

is not performed if a calibration time is reached while you are configuring settings,

while a countdown timer operation is in progress, or while the hands have been

moved for easier viewing of digital information (page E-73).

E-25

x Signal reception may be difficult or even impossible under the conditions

described below.

Inside or

among

buildings

Inside a

vehicle

Near

household

appliances,

office

equipment,

or a mobile

phone

Near a

construction

site, airport,

or other

sources of

electrical

noise

Near

high-tension

power lines

Among

or behind

mountains

E-24

To get ready for a receive operation

1. Confirm that the watch is in the Timekeeping Mode. If it isn’t, use C to enter the

Timekeeping Mode (page E-36).

2. The antenna of this watch is located on its 12 o’clock side. Position the watch

with 12 o’clock facing towards a window as shown in the nearby illustration.

Make sure there are no metal objects nearby.

12 o’clock

or

x Signal reception normally is better

at night.

x The receive operation takes from three

to eight minutes, but in some cases

it can take as long as 16 minutes.

Take care that you do not perform any

button operation or move the watch

during this time.

E-23

x Even when the watch is within range of a transmitter, signal reception may be

impossible due to the effects of geographic contours, structures, weather, the time

of year, the time of day, radio interference, etc. The signal becomes weaker at

distances of approximately 500 kilometers, which means that the influence of the

conditions listed above becomes even greater.

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.

− Mainflingen (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)

x As of January 2017, China does not use Daylight Saving Time (DST). If China does

go to the Daylight Saving Time system in the future, some functions of this watch

may no longer operate correctly.

E-22

Japanese Signals Chinese Signal

Fukushima

500 kilometers

1,000 kilometers

Fukuoka/Saga

Signals are receivable in the Taiwan area

when reception conditions are good.

1,500 kilometers

Changchun500 kilometers

Beijing

Shangqiu

Shanghai

Chengdu

Hong Kong

E-21

Approximate Reception Ranges

UK and German Signals North American Signal

Anthorn

500 kilometers

1,500 kilometers

Mainflingen

The Anthorn signal is receivable

within this area.

2,000 miles

(3,000 kilometers)

600 miles

(1,000 kilometers)

Fort Collins

E-20

If your Home City Code setting is this:

The watch can receive the signal from the

transmitter located here:

LIS, LON, MAD, PAR, ROM, BER, STO,

ATH, MOW

Anthorn (England), Mainflingen (Germany)

HKG, BJS Shangqiu City (China)

TPE, SEL, TYO Fukushima (Japan), Fukuoka/Saga (Japan)

HNL, ANC, YVR, LAX, YEA, DEN, MEX,

CHI, NYC, YHZ, YYT

Fort Collins, Colorado (United States)

Important!

x The areas covered by MOW, HNL and ANC are quite far from the calibration

signal transmitters, so certain conditions may cause reception problems.

x When HKG or BJS is selected as the Home City, only the time and date are

adjusted according to the time calibration signal. You need to switch manually

between standard time and daylight saving time (DST) if required. See “To

configure Home City settings” (page E-40) for information about how to do this.

Rating

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