Casio 5179 Time Calibration Signal Reception, Viewing the Latest Signal Reception Results, LON, PAR, ATH, TYO, HKG, YES, YES, YES, YES, WORK, WORK, Note, Note, READY

Operation Guide 5179

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal: auto receive and manual receive.

•Auto Receive

With auto receive, the watch receives the time calibration signal automatically up to six times a day (five times for the China signal). When any auto receive is successful, the remaining auto receive operations are not performed. For more information, see “About Auto Receive” (page E-23).

•Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a button. For more information, see “To perform manual receive” (page E-26).

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•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 power	behind
buildings		appliances,	site, airport,	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.

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Your Home City		Auto Receive Start Times
		1	2	3	4	5	6
LON	Standard Time	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am	Midnight*
	Daylight	2:00 am	3:00 am	4:00 am	5:00 am	Midnight*	1:00 am*
	Saving Time
PAR	Standard Time	2:00 am	3:00 am	4:00 am	5:00 am	Midnight*	1:00 am*
	Daylight	3:00 am	4:00 am	5:00 am	Midnight*	1:00 am*	2:00 am*
	Saving Time
ATH	Standard Time	3:00 am	4:00 am	5:00 am	Midnight*	1:00 am*	2:00 am*
	Daylight	4:00 am	5:00 am	Midnight*	1:00 am*	2:00 am*	3:00 am*
	Saving Time
TYO	Standard Time	Midnight	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am
HKG	Standard Time	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am
HNL, ANC,	Standard Time
LAX, DEN,	Daylight	Midnight	1:00 am	2:00 am	3:00 am	4:00 am	5:00 am
CHI, NYC	Saving Time
							* Next day
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To perform manual receive
		1. Place the watch on a stable surface so its 12 o’clock
		side is facing towards a window (page E-21).
		2. In the Timekeeping Mode, hold down Afor about two
		seconds.
		3. The second hand will move to READY (R) to indicate
		that the watch is setting up for time calibration
	30	reception.
		• The second hand will move to WORK (W) and stay there

	while actual reception is in progress.
	• If signal reception is unstable during reception, the
WORK (W)	second hand may move between WORK (W) and
	READY (R).
READY (R)
	• The hour and minute hands continue to keep time
	normally.

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Viewing the Latest Signal Reception Results

You can use the procedure below to check whether or not the last signal receive operation was successful.

To check the latest signal reception results

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.

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About Auto Receive

The watch receives the time calibration signal automatically up to six times a day (five times for the China signal). 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 City, and whether standard time or Daylight Saving Time is selected for your Home City.

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Note

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

•Auto receipt 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.

•Remember that reception of the calibration signal depends on the current time in the Timekeeping Mode.

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YES (Y)	NO (N)	• If reception is successful, the second hand will move to
		YES (Y), and the date and time settings will be adjusted
		accordingly. Normal timekeeping will resume after that.
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Note

•To interrupt a receive operation and return to the Timekeeping Mode, press any button.

•If reception is not successful, the second hand will move to NO (N). Five seconds later, the second hand will resume normal operation, without any adjustment of the hand setting.

•If the second hand is pointing to YES (Y) or NO (N), you can return to the Timekeeping Mode by pressing A.

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Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.

Problem	Probable Cause	What you should do
The second	• You changed the time setting	• Perform manual signal

YES (Y) NO (N)

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In the Timekeeping Mode, press A.

•If the watch was able to perform a successful signal receive operation since midnight, the second hand will move to YES (Y). If the watch has been unable to receive any signal successfully, the second hand will move to NO (N).

•The watch will return to the Timekeeping Mode after five seconds or when you press A.

•The current receive result is cleared when the first auto receive operation is performed on the following day. This means YES (Y) indicates successful signal reception since the start of the current day.

•If you adjust the time or date setting manually, the second hand will move to NO (N).

hand is pointing	manually.	receive at night or wait until
at NO (N).	• You performed some button	the next auto signal receive
	operation during the auto receive	operation is performed.
	operation.	• Enter the Timekeeping
	• The watch is not in the	Mode and try again.
	Timekeeping Mode.	• Check to make sure the
	• Signal reception results are reset	watch is in a location
	when the first auto receive	where it can receive the
	operation is performed on the	signal (page E-21).
	following day.
	• Radio interference is often present
	during the day time, which can
	interfere with calibration signal
	reception.

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