Inventory Of Contents/ Additional Equipment; About Wwvb - La Crosse Technology WS-6002U Instruction Manual

INVENTORY OF CONTENTS
1) WS-6002U
2) Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1) Two fresh 1.5V AA batteries.
2) Three wall-hanging screws.
3) Appropriate screwdriver for screws.
ABOUT WWVB (Radio Controlled Time)
The NIST (National Institute of Standards and Technology—Time
and Frequency Division) WWVB radio station is located in Ft.
Collins, Colorado, and transmits the exact time signal continuously
throughout the United States at 60 kHz. The signal can be
received up to 2, 000 miles away through the internal antenna in
the Atomic Clock. However, due to the nature of the Earth's
Ionosphere, reception is very limited during daylight hours. The
Atomic Clock will search for a signal every night when reception
is best. The WWVB radio station derives its signal from the NIST
Atomic clock in Boulder, Colorado. A team of atomic physicists is
continually measuring 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 transmitter.
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