Operating Instructions

AHFL 433 B2
US - EN
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13 ■
The default time zone of the weather station is Eastern Standard
Time (EST). To change the time zone please refer to Basic
settings section.
If the device is unable to synchronize with the WWVB signal,
you can also set the time manually (see Basic settings section)
or you can attempt automatic reception again.
♦ Briefly press control surface
5 to attempt the reception
search again. The reception icon flashes on the time
display2.
The WWVB signal
WWVB is a National Institute of Standards and Technology
(NIST) time signal radio station near Fort Collins, Colorado.
The 70 kW ERP signal transmitted from WWVB is a continuous
60 kHz carrier wave, the frequency of which is derived from
a set of atomic clocks located at the transmitter site, yielding a
frequency uncertainty of less than 1 part in one trillion.
Under ideal conditions, the weather station can receive the signal
up to a distance of approximately 2000 miles from the transmitter.
Reception of the WWVB signal normally takes between 3 and
5 minutes. If reception of the WWVB signal fails, the weather
station will stop trying to establish reception after approximately
7 minutes. Reception can be considerably restricted by obstacles
(e.g. concrete walls) or interference sources (e.g. other electronic
devices). If reception problems persist, you should change the
location of the weather station (e.g. put it by a window).
IB_314696_AHFL433B2_WeatherStation_LB9.indb 13 26.03.19 14:40