Casio 4713 UTC, UTC, UTC, UTC, UTC, UTC, UTC, UTC, UTC, UTC, ERR, Note, JP40, JP60, US60, UK60, UTC +0, UTC +1, UTC +2, UTC +8, UTC +9, GE77.5, UTC –10, Important

Receive failed

Transmitter indicator

Receive successful Receive date

Operation Guide 4709 4713

Important!

•When getting ready to receive the time calibration signal, position the watch as shown in the nearby illustration, with its 12 o’clock side facing towards a window. This watch is designed to receive a time calibration signal late at night. Because of this, you should place the watch near a window as shown in the illustration when you take it off at night. Make sure there are no metal objects nearby.

12 o’clock

or

•Make sure the watch is facing the right way.

•Proper signal reception can be difficult or even impossible under the conditions listed below.

Inside or	Inside a	Near	Near a	Near high-	Among or
among	vehicle	household	construction	tension	behind
buildings		appliances,	site, airport,	power lines	mountains
		office	or other
		equipment,	sources of
		or a mobile	electrical
		phone	noise

•Signal reception normally is better at night than during the day.

•Time calibration signal reception 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 operations or move the watch during this time.

•The time calibration signal the watch will attempt to pick up depends on its current Home Time Zone setting as shown below. If you use the watch in Japan or Europe (each of which has two different transmitter locations), it will try to receive the time calibration signal from one of the transmitters in your current location. If it cannot receive the signal, it will then try to receive the time calibration signal from the other transmitter.

Home Time Zones and Transmitters

Home Time Zone		Transmitter	Frequency
UTC	+0	Anthorn (England)	60.0 kHz
UTC	+1
		Mainflingen (Germany)	77.5 kHz
UTC	+2
UTC	+8	Fukushima (Japan)	40.0 kHz
UTC	+9	Fukuoka/Saga (Japan)	60.0 kHz
UTC –10
UTC	–9		60.0 kHz
UTC	–8	Fort Collins, Colorado
UTC	–7	(the United States)
UTC	–6
UTC	–5

Approximate Reception Ranges

U.K. and German Signals		U.S. Signal
1,500 kilometers
		2,000 miles
	Mainflingen	(3,000 kilometers)
Anthorn
		600 miles
500 kilometers		(1,000 kilometers)
		Fort Collins
The Anthorn signal
is receivable within
this area.
		500 kilometers
500 kilometers		Fukushima
Fukuoka/Saga
		1,000 kilometers
1,000 kilometers

Japan Signals

•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)

•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.

•See the information under “Signal Reception Troubleshooting” if you experience problems with time calibration signal reception.

About Auto Receive

The watch receives the time calibration signal automatically up to six times a day. When any auto receive is successful, the remaining auto receive operations are not performed. The reception schedule (calibration times) depends on your currently selected Home Time Zone, and whether standard time or Daylight Saving Time is selected for your Home Time Zone.

Your Home Time Zone		Auto Receive Start Times
		1	2	3	4	5	6
UTC +0	Standard Time	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am	Midnight
(DST ON : UTC +1)							next day
	Daylight	2:00 am	3:00 am	4:00 am	5:00 am	Midnight	1:00 am
	Saving Time					next day	next day
UTC +1	Standard Time	2:00 am	3:00 am	4:00 am	5:00 am	Midnight	1:00 am
(DST ON : UTC +2)						next day	next day
	Daylight	3:00 am	4:00 am	5:00 am	Midnight	1:00 am	2:00 am
	Saving Time				next day	next day	next day
UTC +2	Standard Time	3:00 am	4:00 am	5:00 am	Midnight	1:00 am	2:00 am
(DST ON : UTC +3)					next day	next day	next day
	Daylight Saving	4:00 am	5:00 am	Midnight	1:00 am	2:00 am	3:00 am
	Time			next day	next day	next day	next day
UTC +8	Standard Time	Midnight	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am
UTC +9
UTC –10 (DST ON : UTC –9)	Standard Time
UTC – 9 (DST ON : UTC –8)	Daylight Saving
UTC – 8 (DST ON : UTC –7)	Time	Midnight	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am
UTC – 7 (DST ON : UTC –6)
UTC – 6 (DST ON : UTC –5)
UTC – 5 (DST ON : UTC –4)

Note

•When a calibration time is reached, the watch will receive the calibration signal only if it is in either the Timekeeping Mode or Dual Time Mode. Reception is not performed if a calibration time is reached while you are configuring settings.

•Auto receive of the calibration signal is designed to be performed early in the morning, while you sleep (provided that the Timekeeping Mode time is set correctly). Before going to bed for the night, remove the watch from your wrist, and put it in a location where it can receive the signal easily.

•The watch receives the calibration signal for two to 14 minutes everyday when the time in the Timekeeping Mode reaches each of the calibration times. Avoid performing any button operation within five minutes before or after any one of the calibration times. Doing so can interfere with correct calibration.

•Remember that reception of the calibration signal depends on the current time in the Timekeeping Mode. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the displayed time actually is the correct time.

About the Receiving Indicator

During signal reception, the receiving indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest.

I	I	I I	II
			I
I				I
I
I			I	I
	I	I I
Receiving indicator					Weak	Strong
					(Level 0)	(Level 3)

•Use the receiving indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations.

•Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the receiving indicator to indicate signal strength.

Transmitter Indicator

During signal reception, an indicator of the transmitter whose signal the watch is attempting to receive will flash. After signal reception is complete, the indicator of the transmitter from which the signal was received will remain on, without flashing.

•The following shows the meaning of each of the transmitter indicator names.

JP40: Fukushima (Japan)

JP60: Fukuoka/Saga (Japan)

US60: Fort Collins, Colorado (the United States)

GE77.5: Mainflingen (Germany)

UK60: Anthorn (England)

•The transmitter indicator turns off automatically at the start of the first auto receive operation of a new day. The time of the first auto receive operation of a new day depends on your currently selected Home Time Zone.

To perform manual receive

		Receiving						1. Enter the Timekeeping Mode or display the last signal
	I							screen.
I II					I I	II		2. Place the watch on a stable surface so its 12 o’clock side
II		I		I
I		I	I
	I					I
II			I				I	is facing towards a window.
			I
			I			I	I	3. Hold down Cfor about two seconds until the watch beeps.
				I	I I
								4. After you release C the display will show the letters RC.

This indicates that signal reception is in progress.

• The indicator of the transmitter whose signal the watch is attempting to receive will flash.

• Time calibration signal reception takes from two to

14 minutes. Take care that you do not press Cor move the watch during this time.

		• If the receive operation is successful, the reception date
		and time appear on the display. The indicator of the
▲		transmitter whose signal the watch received will also be
		indicated.
	▲
		The watch will enter the Timekeeping Mode if you press
▲		Cor if you do not perform any button operation for
		about one or two minutes.

• If the current reception fails, the display shows the ERR indicator.

The watch will enter the Timekeeping Mode without changing the time setting if you press Cor if you do not perform any button operation for about one or two minutes.

2