Operation Guide 5261
E-29
Radio-controlled Atomic Timekeeping Precautions
Strong electrostatic charge can result in the wrong time setting.
x
Even if a receive operation is successful, certain conditions can cause the time
x
setting to be off by up to one second.
The watch is designed to update the date and day of the week automatically for
x
the period January 1, 2000 to December 31, 2099. Updating of the date by signal
reception will no longer be performed starting from January 1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time
x
with the precision noted in “Specifi cations” (page E-76).
The receive operation is disabled under any of the following conditions.
x
While power is at Level 2 or lower (page E-12)
−
While the watch is in the power recovery mode (page E-14)
−
When the watch is in the function sleep state (power saving, page E-16)
−
While a countdown time operation is in progress (page E-47)
−
A receive operation is cancelled if an alarm sounds while it is being performed.
x
E-28
To check the result of the latest receive operation
In the Timekeeping Mode, press
A
.
The
x
x
Second Hand
will move to
YES
(
Y
) for fi ve
seconds if the latest receive operation was successful,
or
NO
(
N
) if it was not. After that, regular timekeeping
will resume.
You can return to the Timekeeping Mode manually by
x
pressing
A
while the
x
Second Hand
is pointing to
YES
(
Y
) or
NO
(
N
).
Note
The
x
x
Second Hand
will indicate
NO
(
N
) if you have
adjusted the time or date setting manually since the
latest receive operation.
@
E-27
The receive operation is complete when the
3.
x
Second
Hand
moves to
YES
(
Y
) or
NO
(
N
) for about fi ve
seconds, and then resumes regular timekeeping.
You can return to the Timekeeping Mode manually by
x
pressing
A
while the
x
Second Hand
is pointing to
YES
(
Y
) or
NO
(
N
).
When the receive operation is successful, the watch
x
adjusts the time setting accordingly. It does not adjust
the setting if the operation failed.
Note
To interrupt a receive operation and return to the
x
Timekeeping Mode, press any button.
@
E-26
To perform manual receive
In the Timekeeping Mode, keep
1.
A
depressed (for about two seconds) as the
x
Second Hand
goes through the following sequence.
Moves to
x
YES
(or
Y
for some models) or
NO
(
N
) to indicate the last signal
reception result, then to
READY
(
R
).
The
2.
x
Second Hand
indicates the operations the watch is currently performing.
When the
x
x
Second
Hand
is pointed here:
It means this:
READY (R)
Watch is setting up for reception.
WORK (W)
Reception is in progress.
YES (Y)
Reception was completed
successfully.
NO (N)
Reception failed for some reason.
If signal reception is unstable, the
x
x
x
Second Hand
may move between
WORK
(
W
) and
READY
(
R
).
@
E-25
What you should do next depends on whether you are using Auto Receive or
3.
Manual Receive.
Auto Receive: Leave the watch over night in the location you selected in step 2.
x
See “Auto Receive” on page E-25 for details.
Manual Receive: Perform the operation under “To perform manual receive” on
x
page E-26.
Auto Receive
With Auto Receive, the watch performs the receive operation each day
x
automatically up to six times (up to fi ve times for the Chinese calibration signal)
between the hours of midnight and 5 a.m. (according to the Timekeeping Mode
time). When any receive operation is successful, none of the other receive
operations for that day are performed.
When a calibration time is reached, the watch will perform the receive operation
x
only if it is in the Timekeeping Mode or World Time Mode. The receive operation is
not performed if a calibration time is reached while you are confi guring settings.
E-24
Signal reception may be diffi cult or even impossible under the conditions
x
described below.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
offi ce
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near
high-tension
power lines
Among
or behind
mountains
E-23
To get ready for a receive operation
Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down
1.
C
at least
two seconds to enter the Timekeeping Mode.
Place the watch in a location where signal reception is good.
2.
Position the watch as shown in the
x
nearby illustration, with 12 o’clock
pointed towards a window. Make sure
there are no metal objects nearby.
Signal reception normally is better
x
at night.
The receive operation takes from two
x
to seven minutes, but in some cases
it can take as long as 14 minutes.
Take care that you do not perform
any button operation or move the
watch during this time.
12 o’clock
or
E-22
Signal reception may not be possible at the distances noted below during certain
x
times of the year or day. Radio interference may also cause problems with
reception.
Mainfl ingen (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: 500 kilometers (310 miles)
−
As of December 2010, China does not use Daylight Saving Time (DST). If China
x
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.
Using this watch in a country covered by a time calibration that is different from the
x
countries it supports may result in incorrect time indication due to local application
of summer time, etc.
E-21
Japanese Signals
Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun
500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
E-20
Approximate Reception Ranges
UK and German Signals
North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainfl ingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
