This watch receives a time calibration signal and updates its time setting accordingly. However, when using the watch outside of areas covered by time calibration signals, you will have to adjust the settings manually as required. See “Configuring Current Time and Date Settings Manually” (page E-33) for more information.
This section explains how the watch updates its time settings when the city code selected as the Home City is in Japan, North America, Europe, or China, and is one that supports time calibration signal reception.
Important!
- The areas covered by MOW, HNL and ANC are quite far from the calibration signal transmitters, so certain conditions may cause reception problems.
- When HKG or BJS is selected as the Home City, only the time and date are adjusted according to the time calibration signal. You need to switch manually between standard time and daylight saving time (DST) if required. See “To configure Home City and summer time settings” (page E-31) for information about how to do this.
Approximate Reception Ranges
- Even when the watch is within range of a transmitter, signal reception may be impossible due to the effects of geographic contours, structures, weather, the time of year, the time of day, radio interference, etc. The signal becomes weaker at distances of approximately 500 kilometers, which means that the influence of the conditions listed above becomes even greater.
- Signal reception may not be possible at the distances noted below during certain times of the year or day. Radio interference may also cause problems with reception. Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles). Fort Collins (United States) transmitter: 600 miles (1,000 kilometers). Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles). Shangqiu (China) transmitter: 500 kilometers (310 miles)
- As of December 2012, China does not use Daylight Saving Time (DST). If China does go to the Daylight Saving Time system in the future, some functions of this watch may no longer operate correctly.
