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minutes the clock will either receive the WWVB signal and set itself to the exact time, or it will
determine that the signal is not receivable at its current location and time of day. If a signal is
not receivable it will fast-forward the hands to the 4, 8, or 12 o’clock position and search for
WWVB each hour until a signal is received. If the time is manually set the clock will continue
to periodically search for a signal and automatically reset the hands when the signal is
received.
The La Crosse Technology clock is designed for indoor use only. Select a
location to place your radio controlled clock where it will be at least six feet away from a TV,
computer, air conditioner or other household electrical appliances. The optimal location is near
a window. Windows facing Colorado provide the best signal.
The WWVB time signal will easily penetrate masonry and wood framed buildings.
WWVB will penetrate almost every residential building and most steel buildings if they have
adequate windows. It is not possible, however, for WWVB to penetrate most indoor shopping
malls and rooms in the center of large office buildings that do not have windows. In buildings
that WWVB cannot penetrate you may set the time using the manual time set button. When
the clock receives the WWVB signal it will automatically set the hands to the exact time.
La Crosse Technology clocks do not receive or process radio controlled time signals
from Germany’s DCF 77, Japan’s J Ga AS, or England’s MSFs atomically regulated
transmitters. La Crosse Technology clocks can be manually set and used anywhere.
For more information on the NIST and radio controlled time, see
www.boulder.nist.gov/timefreq/
SET THE TIME USING THE MANUAL TIME SET BUTTON
In some cases, the La Crosse Technology clock may not receive the WWVB signal due to
atmospheric disturbances or hard to reach locations such as inside shopping malls. In this
case, please use the Manual Time Set button, located at the back of the clock to manually set
the time. To do this:
1. Press and hold the Manual Set button. The second hand will move to the 12 position.
2. Release the Manual Set button and again press and hold the Manual Set button. The
minute and hour hands will fast-forward while the button is held.
3. Keep holding the Manual Set button until the time is set as required.
4. Release the button. About 3 seconds later, the second hands will start to move and the
clock is now running with manual time.
Note:
When the clock displays manual time, it will continue to try to receive the WWVB signal each
hour.
MANUAL TIME SET
BUTTON