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Anleitung Zusammenfassung
ADDITIONAL EQUIPMENT (not included) 1) Two fresh 1.5V AA batteries (optional for projection alarm clock) FEATURES OF PROJECTION ALARM Operation of these features is in section III 1. Radio-controlled time 2. Projection of time 3. LED backlight 4. Display of indoor temperature/humidity or alarm time 5. Time alarm 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 projection alarm. However, due to the nature of the Earth’s Ionosphere, reception is very limited during daylight hours. The projection alarm will search for a signal every night when reception is best. The WWVB radio station receives the time data 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. For more detail, visit To listen to the NIST time, call (303)499-7111. This number will connect you to an automated time, announced at the top of the minute in “Coordinated Universal Time”, which is also known as Greenwich Mean Time (GMT). This time does not follow Daylight Saving Time changes. After the top of the minute, a tone will sound for every second. It is possible that your projection alarm may not be exactly on the second due to the variance in the quartz. However, the clock will adjust the quartz timing over the course of several days to be very accurate; under 0.10 seconds per day. 3 QUICK SET-UP GUIDE Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries. 1. We recommend beginning the set-up procedure at night when the WWVB signal is easiest to receive. 2. It is also highly recommended to set the projection alarm in a window or other area free of interference in the area of your home that is closest to Colorado (the source of the WWVB signal). NOTE: The above steps are not required bu...
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