— 2 —
Reception Range
This watch is designed to receive the standard time calibration signal of Japan (JJY
) or of the United States (WWVB).
The signal that is
received depends on the c
urrent Home City setting.
When this Home City is selected:
You can receive this signal
Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)
TYO
LAX, DEN, CHI, NYC
Fort Collins, Colorado signal
1000km
Mt. Hagane
(60kHz)
Mt. Otakadoya
(40kHz)
500km
1000km
500km
Transmitter Locations
•
Under optimum conditions, the calibration signal sho
uld be
receivable up to 1,000 kilometers from the tr
ansmitter
. Note
that the wave is relativ
ely weak at distances greater t
han
500km, so reception ma
y be poor at long distances
.
Fort Collins
3000km
1000km
Transmitter Location
•
Under optimum conditions, the calibration signal sho
uld be
receivable up to 3,000 kilometers from the tr
ansmitter
. Note
that the wave is relativel
y weak at distances greater
than
1,000km, so reception ma
y be poor at long distan
ces.
What is a radio-controlled watch?
Y
our radio-controlled watch is designed to receive a time
calibration signal that contains standard time data and ad
just its
current time setting accordingl
y.
Time Calibration Signal
The time calibration signal is the same one
used by TV and radio
stations to keep accurate time and sound their time signals.
The
standard time data of the time calibration signal is controlled b
y
cesium beam atomic cloc
k.
T
ime data
After the watch receives the Japan Standard
T
ime signal, it
performs internal calc
ulations to determine the
current time.
Because of this, there may be an error of up to one second in
the displayed time.
Calibration Signal
•
The Japanese calibration
signal (Call Sign: JJY) is maintained b
y
the independent Japan
Ministry of Posts and
T
elecommunications
Communication Research Laboratory (CRL). It is a long wave
signal transmitted
24 hours a day from the Mt. Otakadoya
transmitter (40kHz) located in
T
a
mura-gun, Fukushima Prefecture,
and from the Mt. Hagane transmitter (
60kHz) located on the
border between Saga
Prefecture and Fukuoka Prefecture.
•
The U.S. calibration signal (
Call Sign: WWVB) is transmitted
by
the National Institute of Standards and
technology from Fort
Collins, Colorado.
Though the calibration sign
al is normally transmitted 24 hours
a day
, transmission ma
y be interrupted occasionall
y due to
maintenance, lightening, etc.
Signal data
Transmitter
Long-wave time
calibration signal
Inside the watch
Decoding
Watch
Time data
Signal received using
built-in antenna.
Watch decodes
received data
and converts it
to time data.
Time is
adjusted
according to
time data.
Cesium
atomic clock
How a Radio-controlled Watch Works
T
ime Required for Reception
Signal reception ta
kes anywhere from about two to six minutes.
•
Note that when
“AUTO
” is specified as the fre
quency selection
mode, signal reception can ta
ke up to 12 minutes.
* See “Specifying the T
ransmitter Selection
Mode in Japan
”
for
more information.
T
riggering Reception Manually
In the
T
imekeeping Mode:
Hold down the
D
button for
about two seconds.
•
The watch beeps and re
ception
starts. Ongoing reception is
indicated by the
icon and the
receive indicator
. See
“Receive
Icon and Indicator
” for more
information.
T
o
interrupt reception
Press the
D
button.
•
All other buttons besides
D
are disabled during signal reception.
When reception is successful
The watch terminates reception and ad
justs the current time. Next
it beeps and then displays the date and time the adjustment was
performed.
•
The
icon and the receive indicator remain on the displa
y to
indicate that reception was
successful. The
icon is cleared
from the display each day at 3:00 a.m.
When reception fails
The watch does not ad
just its current time setting, and displays
“ERR
” instead.
•
The display also return to the normal time
keeping screen
automatically if you do not perform an
y operation for abo
ut one
or two minutes.
Receive Icon and Indicator
While reception is in progress
, the
icon and the receive
indicator
cycle from
“Unstable
” through
“Stable
” as shown below
. How far
they cycle depends on the signal
strength. Keep the watch in a
location where reception
is stable
while reception is in progress.
Unstable
S
table
Module 2609
Unstable
S
table
Module 2639
•
Even under optimum reception conditio
ns, it takes at least
10 seconds before receptio
n starts.
•
Use the receive icon and
receive indicator to chec
k
reception status and to determine
the best location for
signal reception.
•
Note that weather
, the time of day
, surroundings, and other
factors can all af
fect reception.
Location
Reception is dif
ficult and may even be impossible in the locations
described below
.
A
void such locations when performing signal
reception.
•
Y
ou should think of your watch operating li
ke a radio or
TV when it
is receiving the calibration signal.
If you are experiencing problems with reception
, move away
from the types of locations described above to a location
with
better reception, and try again.
Receiving the Calibration Signal
There are two methods you can use to receive the time calibration
signal.
•
Auto reception (Reception is performed a
utomatically at 2:00,
3:00, 4:00, and 5:00 each morning.)
•
Manual reception (Y
ou initiate reception
using a button
operation.)
•
The watch is set
up for auto reception at the fac
tory
, so all you
need to do is to place
it in a location that
allows good reception
each night.
Setting Up to Make Reception Easier
Remove the watch from
your wrist and place it somewhere so its
top (12 o
’clock side, where the antenna is loca
ted) is facing
approximately in the direction of the signal transmitter
. Keep the
watch away from metal objects.
Resin band
Metal band
•
Orienting the watch so
it is sideways to the transmitter ma
kes it
more dif
ficult to receive the signal.
•
Do not move the watch
while it is receiving the calibra
tion signal.
Near high-voltage lines
Among or near buildings
Next to a household
appliance or of
fice equipment
(TV
, speaker
, fax, PC, etc.)
Inside a vehicle
(automobile, train, plane, etc.)
Near mountains
In a location where there is
radio interference
(construction site, airport, etc.)
Receive indicator
Receive icon
•
Geographic contours, nearby buildings, the season, and the time of day can make reception impos
sible even when you are within r
ange of
the transmitter
.
•
Best reception is possible late at night.
쮿
쮿
쮿
2. OPERATION CHART
2-1. MODULE QW-2609/2639