SIGNAL ATLAS / 01–06

Explore the six station options

Choose a signal to see its carrier frequency, broadcast location, and time standard. A watch must support the selected signal; coverage alone does not determine compatibility.

Select a station

Fukushima, Japan

JJY40

40 kHz

An introduction to Japan’s JJY standard time service and the 40 kHz and 60 kHz transmissions.

CARRIER FREQUENCY
40 kHz
TRANSMITTER
Ohtakadoya-yama
REGION
Fukushima, Japan
TIME STANDARD
Japan Standard Time (JST)

Saga, Japan

JJY60

60 kHz

An introduction to Japan’s JJY standard time service and the 40 kHz and 60 kHz transmissions.

CARRIER FREQUENCY
60 kHz
TRANSMITTER
Hagane-yama
REGION
Saga, Japan
TIME STANDARD
Japan Standard Time (JST)

Colorado, United States

WWVB

60 kHz

WWVB is a radio time-signal service associated with United States. Receiver compatibility and coverage depend on the exact watch model and reception conditions. Check the manufacturer’s manual and verify available TimeWave modes in the current app.

CARRIER FREQUENCY
60 kHz
TRANSMITTER
Near Fort Collins
REGION
Colorado, United States
TIME STANDARD
UTC, maintained by NIST

Germany

DCF77

77.5 kHz

DCF77 is a radio time-signal service associated with Germany and parts of Europe. Receiver compatibility and coverage depend on the exact watch model and reception conditions. Check the manufacturer’s manual and verify available TimeWave modes in the current app.

CARRIER FREQUENCY
77.5 kHz
TRANSMITTER
Mainflingen
REGION
Germany
TIME STANDARD
German legal time · UTC+1 / UTC+2

Cumbria, United Kingdom

MSF

60 kHz

MSF is a radio time-signal service associated with United Kingdom. Receiver compatibility and coverage depend on the exact watch model and reception conditions. Check the manufacturer’s manual and verify available TimeWave modes in the current app.

CARRIER FREQUENCY
60 kHz
TRANSMITTER
Anthorn Radio Station
REGION
Cumbria, United Kingdom
TIME STANDARD
UK civil time · UTC / UTC+1

Henan, China

BPC

68.5 kHz

BPC is a radio time-signal service associated with China. Receiver compatibility and coverage depend on the exact watch model and reception conditions. Check the manufacturer’s manual and verify available TimeWave modes in the current app.

CARRIER FREQUENCY
68.5 kHz
TRANSMITTER
Shangqiu
REGION
Henan, China
TIME STANDARD
China Standard Time (UTC+8)

Station details are summarized from the responsible national timing organizations. Always confirm the exact signal modes supported by your watch.

A few useful terms

Carrier frequency
The radio frequency used by a transmitter. It is different from the audio frequency a phone may output.
Time code
The encoded time and date information carried by a signal. A watch needs a compatible receiver to decode it.
Compatibility
The watch model must support the selected signal and reception procedure; being in the same region is not enough.