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Transmitting WWVB time signals
The atomic clock is equipped with an internal antenna to receive the WWVB time signals from the
NIST radio station in Ft. Collins, Colorado (see “ON WWVB Radio Controlled Time”, page 6).
After the atomic clock receives temperature readings from the transmitter,
the WWVB time signal receiver will automatically search for the time sig-
nal. This takes about five to eight minutes.
During the search, the WWVB tower icon in the clock display will flash.
When the radio signal is received, the date and time will be set automati-
cally. Upon successful reception, the tower icon will stay permanently lit.
The atomic clock will continue to search for the WWVB time signal for ev-
ery hour between 1:00 am and 4:30 am every day. After the signal has
been successfully obtained, the time and date will be updated automati-
cally. The daylight savings time is also set automatically.
After reception is established, position the outdoor transmitter and atomic
clock within an effective transmission of 100 feet.
No reception of signals
Ten minutes after inserting the batteries, both the indoor and the outdoor temperature should show
in the display of the atomic clock. If not, remove both sets of batteries, wait five minutes and reinsert
the batteries as described above.
If the tower icon is not fully lit, or if the time is not set automatically, please consider the conditions
for the reception of WWVB data as described above.
If in eight minutes the time signal has not been received, set the time manually (see “Setting the time
manually”, page 17). The atomic clock will continue to search for the WWVB time signals.
You can activate a search for WWVB signals:
– Select the display of seconds (not weekdays) with the
MODE
button;
– Press and hold the
UP
button for two seconds; the tower will flash to indicate the search.
Atomic Clock MD 10954 US.fm Seite 16 Dienstag, 7. März 2006 7:53 07