4
A
MANUAL SET
BUTTON
will turn off
WWVB reception!
TO VIEW THE DIFFERENT MODE IN THE LCD.
In normal display, user may press the + key to toggle between the display of "W date", "Indoor
temp + date" and "W indoor temp" in the LCD:
The Analog Clock:
Note:
The Analog clock and the Temp and date LCD works independently.
Nothing is more precisely measured than time!
And nothing keeps track of time more precisely and trouble-free than La Crosse Technology radio
controlled clocks.
Since the beginning of time, man has been fascinated with the measurement of time and
has devised accurate machines to trap and measure time. Today, time is precisely measured in the
United States by the most accurate clock in North America, the Atomic Clock of the US National
Institute of Standards and Technology, Time and Frequency Division in Boulder, Colorado. A team of
atomic physicists continually measures every second of every day to an accuracy of ten billionths of a
second per day. These physicists have created an international standard, measuring a second as
9,192,631,770 vibrations of a Cesium 133 atom in a vacuum. This atomic clock regulates the WWVB
radio transmitter located in Fort Collins, Colorado, where the exact time signal is continuously broadcast
throughout the United States at 60 kHz to take advantage of stable long wave radio paths found in that
frequency range. Radio waves at these low frequencies use the earth and the ionosphere as a wave-
guide and follow the curvature of the earth for long distances.
The built-in antenna system will receive the WWVB signal anywhere in North America
within 2000 miles of Fort Collins where long-wave radio reception is undisturbed. A microprocessor
activates the receiver and processes the time signal from Fort Collins overnight.
Through the radio signals, La Crosse Technology radio controlled clocks always keep
precise time. The changeover from standard time to daylight savings time, and vice versa, takes place
automatically with the same precision.
Battery
compartment
Weekday
Date
Temperature
