•You can check signal strength by looking at the reception icon that is displayed
during radio wave reception. If you find a place and a direction to aim the watch in
advance that has stable reception, that will help to get a good connection.
*The watch may fail to receive radio waves or may receive them inaccurately near
(within 10km from) the standard radio wave station. In this case, change the direction
of the antenna by 45 - 90 degrees or receive radio waves again at a place far (10km
or farther) from the standard wave station.
*Sometimes when the watch indicates strong radio wave reception, it still may not be
able to receive a signal due to surrounding environmental interference such as
electrical noise.
*The maximum time required to receive a complete signal can be up to 10 minutes. It
may change depending on distance from the standard radio wave station, time,
season, weather, etc.
Places where it may be difficult to receive radio waves
•Places with extremely high or low temperatures.
•Inside ferroconcrete buildings, underground, inside high-rise buildings, in valleys
between mountains, etc.
•Inside vehicles, trains, and airplanes.
•Places that tend to have electrical noise such as near high voltage cables, electric
train cables, and near airports.
•Near home appliances such as televisions, refrigerators, computers, fax machines,
inverter fluorescent lights, OA machines, and operating cellular phones.
*The watch operates using its built-in quartz accuracy under conditions of poor
reception. When it returns to a reception area and receives radio waves, the watch
displays the correct time. The watch operates using its built-in quartz accuracy
between signal reception cycles.
Directions for receiving radio waves
How to receive radio waves
There are two types of wave reception: automatic reception and manual reception.
If you receive radio waves properly, the time and date are adjusted automatically.
Automatic reception
•The watch automatically receives radio waves a maximum of three times a day
Automatic reception time varies according to the time zone setting.
WINTER TIME
SUMMER TIME
•If one of the three reception attempts is successful, automatic reception won't be
attempted again until the next day.
During the daylight saving time (hereinafter, referred to as the DST) period, the
watch receives radio waves at 2:45 a.m., 3:45 a.m., and 4:45 a.m. (ZONE + 1H). If
the watch receives the radio waves normally, it automatically displays the DST. If it
receives the radio waves normally after the DST period, it automatically displays the
ordinary time.
•Since the DST is automatically corrected, you do not need to correct it, as long as
the watch receives radio waves. In a district where the DST is not applied, however,
you are required to correct the DST manually.
Manual reception
•If you press the R button for 2 seconds or longer in Time calendar mode, the watch
receives radio waves after a confirmation beep. The reception icon flashes while the
watch receives the signal. Wait about 2 - 10 minutes until signal reception is
completed.
Confirming reception results
•If you press the R button, you can check the results of a signal reception made within
the last 24 hours.
•The watch displays OK or NG for about 10 seconds after automatic or manual
reception is completed.
OK ---- Reception succeeded.
NG ---- Couldn't receive a signal.
*Even if signal reception completes successfully, if the watch doesn't display the
correct time and date, electrical noise or some other interference may have affected
reception resulting in an error, so change your location and try reception again.
*Please note that the battery is drained quickly if you try reception many times.
Specifications
Reception
Reception wavelength .......... DCF 77.5KHz
Automatic reception (maximum three times a day)
Manual reception
Basic Functions
Time ..................................... Hour/Min/Sec, (24-hour display or a.m./p.m.)
Calendar............................... Year/Month/Date/Day
Dual Time ............................. Hour/Min/Sec (24-hour display or a.m./p.m.)
Alarm .................................... Hour/Min (24-hour display or a.m./p.m.)
Hourly Chime
Battery Life ........................... About 2 years (CR1620)
Names of Parts
Radio Wave Controlled Watch
The letters "UTC" stands for "Universal Time Coordinated", which is the
worldwide standard of timekeeping. It is based upon carefully maintained atomic
(cesium) clocks that keep accurate to within microseconds. Leap seconds are
added or subtracted as necessary to keep UTC in sync with the Earth's rotation.
The reference point for UTC is Greenwich, England.
About this radio wave controlled watch
This watch receives carlibration signal (call sign ; DCF77 ) trasmitted from
Mainflingen, Germany (located 25 kilometers southeast of Frankfurt). and
automatically updates the time and date.
Standard radio waves
Standard radio waves are sent from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt). The signal usually operates 24 hours a
day, but it may be temporarily interrupted for maintenance and lightning
countermeasures.
Radio wave reception zone
This watch can receive radio waves within a radius of about 1,000km from the
standard radio wave station. However, the coverage can vary depending on
time, season, weather conditions, local environmental conditions, etc.
How to successfully receive radio waves
•It may be difficult to receive radio waves when metal shielding blocks the
watch. When inside a ferroconcrete building etc., try to place the watch near a
window that is as close as possible to facing the radio wave station.
•Try not to move the watch during radio wave reception.
•Good reception can be achieved if you aim the reception antenna (on the
upper side of the watch) toward the radio wave station.
