CLOCK WINDOW
WWVB RADIO CONTROLLED TIME
The NIST (National Institute of Standards and Technology) radio station (WWVB) is located in Ft. Collins, Colorado. It transmits an exact time signal continuously throughout the most of the continental United States at 60 KHz frequency. The main unit can receive this WWVB signal through the internal antenna from up to 2,000 miles away. Due to the nature of the Earth’s ionosphere, reception can be limited during the daylight hours. The radio controlled clock will search for an alternate station that receives the atomic time signal from the NIST Atomic clock in Boulder, Colorado.
The WWVB tower icon on the unit’s display will flash indicating a radio signal reception from the WWVB station. If the tower icon is not fully lit, or if the time and date are not set automatically, please consider the following:
•During nighttime hours, atmospheric disturbances are typically less severe and radio signal reception may improve. A single daily reception is sufficient enough to keep the clock accuracy within 1 second.
•Make sure the unit is positioned at 8 feet (2 meters) distance from any interference source such as a TV, computer monitor, microwave, etc.
•Within concrete wall rooms such as basements or office buildings, the received signal may be
weakened. Always place the main unit near the window for better reception.
Once the atomic time signal is received, the date and time will be set automatically, and the [ 
] icon will appear.
ICON
Time Signal Reception Strength
(Flashing)
Undefined data
No Reception for the past 24 hours
Weak signal, but can be decoded
Strong signal
•The atomic clock receiver is programmed that it will search for the time signal daily at 0:00, 3:00, 6:00, and 12:00 am.
•To enable or disable the atomic time receiver, press and hold UP (? ) button for 3 seconds. If time reception is activated, a tower icon will start flashing. If reception is disabled, the tower icon will disappear.
•If the time signal has not been received in 8 minutes, you may set the time manually.
MANUAL SETTINGS
To select the time mode, press UP (? ) or DOWN (? ) until the TIME icon flashes with a beep sound alert. It is necessary to set the desired US TIME ZONE.
TIME ZONE
•Press MODE button once to select hour and minutes with the day of the week display.
•Select the Time Zone by pressing and holding UP (? ) button for 3 seconds
•Keep holding UP (? ) button until the desired US Time Zone (Pacific, Mountain, Central or Eastern) is highlighted on the display’s US map, located to the right of the time display and above the day of the week
•Release the UP (? ) button. The Time Zone is set.
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