Mode reference guide, Operation guide 5121 – G-Shock GW-3000 User Manual

Page 2

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Operation Guide 5121

Approximate Reception Ranges

UK and German Signals

North American Signal

Anthorn

500 kilometers

1,500 kilometers

Mainfl ingen

The Anthorn signal is receivable
within this area.

2,000 miles
(3,000 kilometers)

600 miles
(1,000 kilometers)

Fort Collins

Japanese Signals

Chinese Signal

Fukushima

500 kilometers

1,000 kilometers

Fukuoka/Saga

1,500 kilometers

Changchun

500 kilometers

Beijing

Shangqiu

Shanghai

Chengdu

Hong Kong

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 infl uence of the
above conditions becomes even greater.
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)

As of November 2009, 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.
Using this watch in a country covered by a time calibration signal that is different

from the countries it supports may result in incorrect time indication due to local
application of summer time, etc.

To get ready for a receive operation

Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down

1.

C at least

two seconds to enter the Timekeeping Mode.

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

2.

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

Signal reception normally is better

at night.
The receive operation takes from two

to seven minutes, but in some cases
it can take as long as 14 minutes.
Take care that you do not perform
any button operation or move the
watch during this time.

Signal reception may be diffi cult or even impossible under the conditions

described below.

Inside or
among
buildings

Inside a
vehicle

Near
household
appliances,
offi ce
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

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

3.

Manual Receive.

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

See “Auto Receive” for details.
Manual Receive: Perform the operation under “To perform manual receive”.

Auto Receive

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

up to six times (up to fi ve 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.
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 confi guring settings.

To perform manual receive

In the Timekeeping Mode, keep

1.

A depressed (for about two seconds) as the

x Second Hand goes through the following sequence.

Moves to

YES (or Y for some models) or NO (N) to indicate the last signal

reception result, then to READY (R).

The

2.

x Second Hand indicates the operations the watch is currently performing.

When the

x Second

Hand is pointed here:

It means this:

READY (R)

Watch is setting up for reception.

WORK (W)

Reception is in progress.

YES (Y)

Reception was completed
successfully.

NO (N)

Reception failed for some reason.

If signal reception is unstable, the

x Second Hand may

move between WORK (W) and READY (R).

The receive operation is complete when the

3.

x Second

Hand moves to YES (Y) or NO (N) for about fi ve
seconds, and then resumes regular timekeeping.

You can return to the Timekeeping Mode manually by

pressing

A while the x Second Hand is pointing to

YES (Y) or NO (N).
When the receive operation is successful, the watch

adjusts the time setting accordingly. It does not adjust
the setting if the operation failed.

Note

To interrupt a receive operation and return to the

Timekeeping Mode, press any button.

To check the result of the latest receive operation
In the Timekeeping Mode, press

A.

The

x Second Hand will move to YES (Y) for fi ve

seconds if the latest receive operation was successful,
or NO (N) if it was not. After that, regular timekeeping
will resume.
You can return to the Timekeeping Mode manually by

pressing

A while the x Second Hand is pointing to YES

(Y) or NO (N).

Note

The

x Second Hand will indicate NO (N) if you have

adjusted the time or date setting manually since the latest
receive operation.

Radio-controlled Atomic Timekeeping Precautions

Strong electrostatic charge can result in the wrong time setting.

Even if a receive operation is successful, certain conditions can cause the time

setting to be off by up to one second.
The watch is designed to update the date and day of the week automatically for

the period January 1, 2000 to December 31, 2099. Updating of the date by signal
reception will no longer be performed starting from January 1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time

with the precision noted in “Specifi cations”.
The receive operation is disabled under any of the following conditions.

While power is at Level 2 or lower

While the watch is in the power recovery mode

When the watch is in the function sleep state (“Power Saving”)

A receive operation is cancelled if an alarm sounds while it is being performed.

Mode Reference Guide

Your watch has four “modes”. The mode you should select depends on what you
want to do.

To do this:

Enter this mode:

View the current time in your Home City and in one of 29 other cities

around the globe
View the current date in the Home City

Confi gure Home City and daylight saving time (DST) settings

Perform a time calibration receive operation

Confi gure time and date settings manually

Timekeeping Mode

Use the stopwatch to measure elapsed time

Stopwatch Mode

Select one of 29 cities (time zones) around the world and view the

current time there
Select daylight saving/summer time (DST) or standard time for a

time zone

World Time Mode

Set an alarm time

Alarm Mode

Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.

To determine the watch’s current mode
Check the position of the

v Left Dial Hand as shown

under “To select a mode”.

To return to the Timekeeping Mode from any other
mode
Except while the watch is performing auto hand home
position correction, hold down

C at least two seconds until

the

x Second Hand returns to 12 o’clock.



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