※ When the time difference is set for a region other than radio signal reception range, a radio signal cannot be received.
Check the setting of the time difference → Setting the time difference (selecting a radio signal transmitting station) P.116
※ Radio signal reception results depend on a receiving environment. → Environments in which it is
difficult to receive a radio signal P.106
※ The watch cannot receive a radio signal outside the radio signal reception range. → Radio signal
reception range indication P.100
※ When the watch does not display the correct time even after successfully receiving a radio signal.
→ Troubleshooting: Misalignment of the time and hands P.150
・ Manual reception
This watch can receive a radio signal arbitrarily at any time other than the
automatic reception mode.
→ How to conduct manual reception P.138
・ Automatic reception
This watch sets the time by automatically receiving a radio signal at a fixed time.
This watch automatically receives a radio signal before 2:00 a.m. and 4:00 a.m.
■ Automatic reception and manual reception
※ When the reception is successful, the watch finishes the automatic reception.
・ Place the watch in a place where it can easily receive a radio signal (by the window, etc.)
・Do not move the watch during the radio signal reception.
→ To Improve Radio Signal Reception P.105
Ho
w t
o S
et t
he
Tim
e (R
ad
io S
ign
al R
ec
ep
tio
n)
3
99
Radio-controlled watch
Receive radio signals
through the antenna
inside the watch
↓
Analyze time
information
↓
Display the current
Time
The radio-controlled watch displays the precise Time by automatically receiving and
synchronizing itself with the radio signal of an official standard frequency.
Transmitting
Station
Cesium
Atomic Clock
■ Mechanism of radio signal reception
Setting the time by receiving a radio signal
Time signal transmitted by a standard frequency is based on a super accurate "Cesium
Atomic Clock" that may have a 1 second loss or gain per one hundred thousand years.
Official standard
frequency
Ho
w t
o S
et t
he
Tim
e (R
ad
io S
ign
al R
ec
ep
tio
n)
3
98
Checking the time
2
※ The hands of this watch cannot be moved by turning the crown. So when
adjusting the time, refer to the following pages regarding the procedures.
When the time
are correct
When the radio signal
can be received
Setting the time by
receiving a radio signal
→ P.138
When a radio signal
cannot be received
Manually set the time
→ P.141
Use the watch
without adjustment.
When the
time are
incorrect
Radio signal reception range indication
→ P.100
Environments in which it is difficult to receive a radio signal → P.106
How to set the
time difference
(Selecting a
radio signal
transmitting
station)
→ P.116
2
B
e
fo
re
U
s
e
97
Before use
When the movement of the second hand shows an energy depletion state, the battery requires charging.
The second hand
moves at one-
second intervals.
The second hand
moves at two-
second intervals.
The second hand
moves at five-
second intervals.
The second hand
is stopped.
The watch is
sufficiently charged.
※ If the second hand does not move at one-second intervals even after fully charging the battery → Charging the solar battery in At Trouble on P.148
The charged energy is depleted.
→ P.112
The power save function is activated. → P.113
Check the movements of the second hand
after releasing the Power Save mode.
The energy stored in the watch runs low.
Charge the
battery
sufficiently.
How to
Charge the
Watch
→ P.110
1
Checking the charging status
2
B
e
fo
re
U
s
e
96