■ Radio signal reception range: Germany (DCF77)
The reception range from the transmitting station is approximately 1,000km (1,000 km radius of the
transmitting station).
There are three time zones within the reception range.
Mainflingen
transmitting station
(77.5 kHz)
1,000 km
DCF77 is operated by PTB.
Southeastern Frankfurt
Mainflingen transmitting station (77.5 kHz)
* PTB: Physikalisch-Technische Bundesanstalt
* Even within the reception range, weather conditions,
terrain, buildings, and orientation may mean that
reception is not possible.
“Environments in which it is difficult to receive a radio
signal” → P.26
* Use of automatic reception is recommended, as this
time frame is optimal for automatic reception.
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HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ To improve radio signal reception
● Place the watch in a place where it can easily receive a radio signal
such as near a window.
The antenna is embedded at the 9 o’clock position of the watch.
Turning the antenna toward the outside of a window or the
direction facing transmitting stations helps improve radio signal
reception.
* Locations of transmitting stations
“Radio signal reception range indication” → P.20
● Do not move the watch while it is
receiving radio signals.
To enhance the reception of radio signals, do not move the
watch or do not change the orientation of the watch while it is
receiving radio signals.
* If the button or crown is operated while the watch is receiving a
radio signal, the reception will be cancelled.
● The place where the watch is put before going to bed
Place the watch next to a window facing in the direction of a transmitting station before bedtime because
automatic reception is performed late at night.
The standard radio signal is influenced by the distance from the transmitting station, as well as by terrain
(including buildings) and weather conditions.
Also, please search for a place to easily receive radio signals when attempting reception.
Antenna
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HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■
Environments in which it is difficult to receive a radio signal
Avoid putting the watch in such places when it receives radio signals.
•
Close to home electrical
appliances such as TV’s,
refrigerators or air conditioners
•
Close to OA equipment such as
mobile phones, personal
computers or fax machines
•
Close to steel desks or other
furniture made of metal
•
In places generating radio
interference, such as construction
sites or places with heavy traffic
•
Close to overhead power lines, TV
stations, train cables
•
Inside a building, between tall
buildings, underground
•
Inside a vehicle, train, or airplane
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HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
b
CAUTION
• The watch may display the wrong time if it fails to receive radio signals properly
because of interference.
The watch may also fail to receive radio signals properly depending on the location or
radio wave receiving conditions.
In this case, move the watch to another place where it can receive radio signals.
• When the watch is out of reception range, its accurate quartz movement (loss / gain:
±15 seconds per month on average) will continue to keep the time.
• The time signal transmission may be stopped during maintenance of the facilities of
the (each) transmitting station or because of a lightning strike.
In such a case, see the (each) station’s website for further information or contact
SEIKO CUSTOMER SERVICE CENTER.
• Websites of transmission stations (As of August 2020)
Japan
: National Institute of Information and Communications Technology (Japan
Standard Time Project) http://jjy.nict.go.jp/
China
: NTSC http://www.ntsc.cas.cn/
U.S.A. : NIST https://www.nist.gov/pml/time-and-frequency-division/radio-
stations/wwvb
Germany : PTB https://www.ptb.de/cms/en.html
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