Bedienungsanleitung Casio 4306 (Seite 3 von 3) (Englisch)

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Operation Guide 3779 4306

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from Standard

Time. Remember that not all countries or even local areas use Daylight Saving Time.

The time calibration signal includes both Standard Time and Daylight Saving Time

data. If you select AUTO for the DST setting, the watch will switch between Standard

Time and Daylight Saving time automatically as required.

•Changing the Home Time Zone (GMT differential) setting to anything besides 9

o’clock (GMT +9) or 11 o’clock (receive off) will change the DST setting to AUTO.

Selecting 9 o’clock (GMT +9) or 11 o’clock (receive off) will change the DST setting

to OFF. See “To specify your Home Time Zone” for details about time zones.

To switch between Daylight Saving Time and Standard Time

1. In the Timekeeping Mode, hold down B for about five

seconds until the second hand moves to the currently

selected time zone and stops. This is the setting mode.

2. Press B once.

•This will cause the second hand to move to the 47,

52, or 57 seconds position. The hand position

indicates the current DST setting.

3. Press A to cycle through the DST settings.

•The following shows how the second hand indicates

the DST settings.

47 seconds ................................................... OFF

52 seconds ................................................... AUTO

57 seconds ................................................... DST ON

4. When the setting is the way you want, press B twice to

exit the setting mode.

Reference

This section contains more detailed and technical information about watch operation.

It also contains important precautions and notes about the various features and

functions of this watch.

Back Cover

The back cover of the watch is marked with the relative positions of each time zone

city code. The position of “LAX” on the back of the watch, for example, indicates that

the “LAX” (Los Angeles) city code is located at 8 o'clock on the face of the watch.

Auto Return Features

The watch will return to the Timekeeping Mode automatically if you do not perform any

operation for about three minutes while it is in the Receive Result Mode, the Home

Position Adjustment Mode, or a setting mode.

Button Operation Timing

This watch is designed so the function of a button is executed when you release the

button, not when you press it.

Scrolling

•The A button is used to change the hand setting in various setting modes. In most

cases, holding down the A button will start high-speed movement of the applicable

hand(s).

•High-speed movement of the hands will continue until it completes a 12-hour cycle,

or until you press A to stop it.

Radio-controlled Timekeeping Precautions

•Strong electrostatic charge can result in the wrong time being set.

•Even when the watch is within the reception range of the transmitter, signal

reception will be impossible if the signal is blocked by mountains or other geological

formations between the watch and signal source.

•Signal reception is affected by weather, atmospheric conditions, and seasonal

changes.

•The time calibration signal bounces off the ionosphere. Because of this, such factors

as changes in the reflectivity of the ionosphere, as well as movement of the

ionosphere to higher altitudes due to seasonal atmospheric changes or the time of

day may change the reception range of the signal and make reception temporarily

impossible.

•Even if the time calibration signal is received properly, certain conditions can cause

the time setting to be off by up to one second.

•The current time setting in accordance with the time calibration signal takes priority

over any time settings you make manually.

•If you are in an area where proper time calibration signal reception is impossible, the

watch keeps time within ±20 seconds a month at normal temperature.

•If you have problems with proper time calibration signal reception or if the time

setting is wrong after signal reception, check your Home Time Zone (GMT

differential) setting.

The following are the initial factory defaults for this setting.

Module 3779: GMT +1

Module 4306: GMT +0

•To find out the module number of your watch, look at its

back cover. The Module number (3779 or 4306) is

engraved inside the box on the back cover.

3779

In this case:

The first signal search

operation after the Home Time

Zone has been changed

The second and subsequent

signal searches

The watch does this:

1. Checks the Mainflingen signal first.

2. If the Mainflingen signal cannot be received,

checks the Rugby signal.

1. Checks the signal of the transmitter of the first

receive operation (Rugby or Mainflingen).

2. If the checked signal cannot be received, checks

the other signal.

Transmitters

The time calibration signal received by this watch depends on the currently selected

home time zone.

• When a U.S. time zone is selected, the watch receives the time calibration signal

transmitted from the United States (Fort Collins).

• When a European time zone is selected, the watch receives the time calibration

signals transmitted from Germany (Mainflingen) and England (Rugby). The following

tables show the reception priority for the European signals.

The watch does this:

1. Checks the Rugby signal first.

2. If the Rugby signal cannot be received, checks

the Mainflingen signal.

1. Checks the signal of the transmitter of the first

receive operation (Rugby or Mainflingen).

2. If the checked signal cannot be received, checks

the other signal.

In this case:

The first signal search

operation after the Home Time

Zone has been changed

The second and subsequent

signal searches

When time zone GMT+0 is selected:

Timekeeping

•The current time for all time zones in the Timekeeping Mode is calculated in

accordance with the Greenwich Mean Time (GMT) differential of each zone, based

on your Home Time Zone time setting.

•

GMT differential is calculated by this watch based on Universal Time Coordinated (UTC*) data.

UTC is the world-wide scientific standard of timekeeping. It is based upon carefully

maintained atomic (cesium) clocks that keep time accurately to within

microseconds. Leap seconds are added or subtracted as necessary to keep UTC in

sync with the Earth’s rotation. The reference point for UTC is Greenwich, England.

When time zone GMT+1 or GMT+2 is selected:

Casio 4306 Seite 3

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