Operation Guide 5008
2
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. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
•
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”.
12 o’clock
or
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.
•
Make sure the watch is facing the right way.
•
Proper signal reception can be difficult or even impossible under the conditions listed
below.
•
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.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near high-
tension power
lines
Among or
behind
mountains
Near
household
appliances,
office
equipment,
or a mobile
phone
Home City Code
LON, PAR, ATH
HKG*, TYO
HNL*, ANC*, LAX,
DEN, CHI, NYC
Frequency
60.0 kHz
77.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Anthorn (England)
Mainflingen (Germany)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
•
The time calibration signal the watch will attempt to pick up depends on its current
Home City code 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 City Codes and Transmitters
*
The areas covered by the
HKG
,
HNL
, and
ANC
city codes are quite far from the
time calibration signal transmitters, and so certain conditions may cause problems
with signal reception.
Approximate Reception Ranges
Anthorn
Mainflingen
500 kilometers
Fort Collins
600 miles
(1,000 kilometers)
Fukuoka/Saga
500 kilometers
Fukushima
500 kilometers
U.K. and German Signals
U.S. Signal
Japan Signal
1,500 kilometers
2,000 miles
(3,000 kilometers)
1,000 kilometers
1,000 kilometers
U.K. signal
transmitter
approximate
reception range
as of April 2007
•
In April 2007, the U.K. signal transmitter was moved from Rugby to Anthorn, which
resulted in a slight shift in the approximate reception range of the signal. The shift is
so slight that there is virtually no change in the ability to receive the signal.
•
Even when the watch is within the reception range of a transmitter, signal reception
may be impossible at times due to the effects of geographic contours, structures,
weather, the season of the year, the time of day, radio interference, etc. Note that the
signal becomes weaker at distances of approximately 500 kilometers from the
transmitter, which means that the influence of the conditions listed above becomes
even greater.
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
City, and whether standard time or Daylight Saving Time is selected for your Home City.
Your Home City
Auto Receive Start Times
LON
PAR
ATH
HKG, TYO
HNL, ANC,
LAX, DEN,
CHI, NYC
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Standard Time
Daylight
Saving Time
1
1:00 am
2:00 am
2:00 am
3:00 am
3:00 am
4:00 am
Midnight
Midnight
2
2:00 am
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
1:00 am
1:00 am
3
3:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight*
2:00 am
2:00 am
4
4:00 am
5:00 am
5:00 am
Midnight*
Midnight*
1:00 am*
3:00 am
3:00 am
5
5:00 am
Midnight*
Midnight*
1:00 am*
1:00 am*
2:00 am*
4:00 am
4:00 am
6
Midnight*
1:00 am*
1:00 am*
2:00 am*
2:00 am*
3:00 am*
5:00 am
5:00 am
* Next day
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.
•
The watch receives the calibration signal for two to 14 minutes every day when the
time in the Timekeeping Mode reaches each of the calibration times. Do not perform
any button operation within 14 minutes before or after 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.
To perform manual receive
1. Place the watch on a stable surface so its 12 o’clock
side is facing towards a window.
2. In the Timekeeping Mode, hold down
A
for about two
seconds until the watch beeps.
3. The stopwatch second hand will move to
READY
to
indicate that the watch is setting up for time calibration
reception.
•
The stopwatch second hand will move to
WORK
and
stay there while actual reception is in progress.
•
If signal reception is unstable during reception, the
stopwatch second hand may move between
WORK
and
READY
.
•
The hour and minute hands continue to keep time
normally.
30
READY
WORK
30
YES (Y)
NO (N)
•
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.
•
If reception is successful, the stopwatch second hand
will move to
YES
(
Y
). Five seconds later, the hands will
move to the correct time.
Note
•
To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
•
If reception is not successful, the stopwatch second hand will move to
NO
(
N
). Five
seconds later, the stopwatch second hand will resume normal operation, without any
adjustment of the hand setting.
•
If the stopwatch second hand is pointing to
YES
(
Y
) or
NO
(
N
), you can return to the
Timekeeping Mode by pressing
A
.
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
In the Timekeeping Mode, press
A
.
•
If the watch was able to perform a successful signal
receive operation since midnight, the stopwatch second
hand will move to
YES
(
Y
). If the watch has been unable
to receive any signal successfully, the stopwatch 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
stopwatch second hand will move to
NO
(
N
).
30
YES (Y)
NO (N)
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Probable Cause
•
You changed the time setting manually.
•
You performed some button operation
during the auto receive operation.
•
The watch is not in the Timekeeping
Mode.
•
Signal reception results are reset at
midnight each day.
•
Radio interference is often present
during the day time, which can interfere
with calibration signal reception.
•
The Home City setting is not correct
for the area where you are using the
watch.
•
The home position of the hands is
off.
Problem
The stopwatch
second hand is
pointing at
NO
(
N
).
The time setting
is incorrect
following signal
reception.
What you should do
•
Perform manual signal
receive at night or wait until
the next auto signal receive
operation is performed.
•
Enter the Timekeeping
Mode and try again.
•
Check to make sure the
watch is in a location
where it can receive the
signal.
•
Select the correct Home
City.
•
Enter the home position
adjustment mode and
adjust the home position.
•
For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions” .