To Perform Manual Receive; To Turn Auto Receive On And Off; To View The Latest Signal Reception Results; About Auto Receive - Casio 5161 Operation Manual

Operation Guide 5161
Japan Signals
500 kilometers
Fukuoka/Saga
1,000 kilometers
1,500 kilometers
500 kilometers
Chengdu
Shangqiu
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About Auto Receive

The watch receives the time calibration signal automatically up to 6 times a day
(5 times a day for the Chinese calibration 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.
Your Home City
1 2
LON Standard Time 1:00 am 2:00 am
Daylight Saving Time 2:00 am 3:00 am
PAR Standard Time 2:00 am 3:00 am
Daylight Saving Time 3:00 am 4:00 am
ATH Standard Time 3:00 am 4:00 am
Daylight Saving Time 4:00 am 5:00 am
HKG Standard Time and 1:00 am 2:00 am
Daylight Saving Time
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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 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.
• 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.
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• Check the second hand position to find out the status of a receive operation and to
determine the best location for signal reception.
• Note that weather, the time of day, surroundings, and other factors all can affect
reception.
Note
To cancel an ongoing signal receive operation, press any button.
When reception is successful
• "GET" appears when reception is complete, and the
Receive successful
watch adjusts its current time setting.
• To return to the Timekeeping Mode after "GET" appears,
press B or C, or do not perform any operation for one
or two minutes.
• The receive successful indicator is displayed after a
successful receive operation.
Receive successful indicator
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4. Press C to toggle auto receive on (ON) and off (OFF).
After the setting is the way you want, press A to exit the setting mode.
5. To return to the Timekeeping Mode, hold down B for at least two seconds.

To view the latest signal reception results

1. In the Timekeeping Mode, press B to enter the Battery/Receive Mode.
2. Press C to display the date and time of the last successful signal reception.
1 second
▲
1 second
• To return to the Timekeeping Mode, hold down B for at least two seconds.
• If there have been no successful receptions, the time will show "- -:- -".
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500 kilometers
Fukushima
1,000 kilometers
China Signal
Changchun
Beijing
Shanghai
Hong Kong
Auto Receive Start Times
3 4 5 6
3:00 am 4:00 am 5:00 am Midnight*
4:00 am 5:00 am Midnight* 1:00 am*
4:00 am 5:00 am Midnight* 1:00 am*
5:00 am Midnight* 1:00 am* 2:00 am*
5:00 am Midnight* 1:00 am* 2:00 am*
Midnight* 1:00 am* 2:00 am* 3:00 am*
3:00 am 4:00 am 5:00 am
1 second
• Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference also may 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: 1,500 kilometers (910 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" (page E-29) if you
experience problems with time calibration signal reception.
Your Home City
1 2
TYO Standard Time Midnight 1:00 am
HNL Standard Time and Midnight 1:00 am
ANC Daylight Saving Time
LAX
DEN
CHI
NYC

To perform manual receive

1. While in the Timekeeping Mode or Battery/Receive
Receiving
Mode, hold down C for about two seconds.
• The second hand will move to READY (R) and signal
reception will start.
• The digital display will go blank at this time.
• The second hand will indicate the current reception
status.
READY (or R) : Unstable
WORK (or W) : Stable
• Keep the watch in a location where reception is stable
while a receive operation is in progress.
• Signal reception takes from three to eight minutes, but
READY (or R)
in some cases it can take as long as 16 minutes. Take
care that you do not perform any button operations or
move the watch during this time.
• Even under optimum reception conditions, it can take
about 30 seconds for reception to stabilize.
When reception fails
• The watch displays "ERROR" without adjusting the current time setting.
• To return to the Timekeeping Mode after "ERROR" appears, press B or C, or do
not perform any operation for one or two minutes.
• Once any receive operation is successful, the receive successful indicator will
remain on the display for the rest of the day, even if other receive operations fail.

To turn auto receive on and off

1. In the Timekeeping Mode, press B to enter the
Battery/Receive Mode.
2. Press C to display the date and time of the last
successful signal reception.
3. Hold down A until the current auto receive setting (ON
or OFF) starts to flash. This is the setting screen.
• Note that the setting screen will not appear if the
On/Off status
currently selected Home City is the one that does not
support time calibration reception.
• For information about city codes that support signal
receive, see "To specify your Home City" (page E-12).

Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.
Problem Probable Cause
• The watch is not in the
Cannot perform
manual receive. Timekeeping Mode.
• Your current Home City is not
one of the following: LON, PAR,
ATH, HKG, TYO, HNL, ANC,
LAX, DEN, CHI, or NYC
• A countdown timer operation is
in progress.
• You changed the time setting
Auto receive is
turned on, but the manually.
• The DST setting was changed
receive successful
indicator does not manually.
• You pressed a button while
appear on the
display. signal receive was in progress.
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Auto Receive Start Times
3 4 5 6
2:00 am 3:00 am 4:00 am 5:00 am
2:00 am 3:00 am 4:00 am 5:00 am
*Next day
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What you should do
• Enter the Timekeeping Mode
and try again.
• Select LON, PAR, ATH, HKG,
TYO, HNL, ANC, LAX, DEN,
CHI, or NYC as your Home
City (page E-12).
• Enter the Countdown Timer
Mode and stop the countdown
(page E-42).
• Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
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