My clock doesnt synchronize at all
If your ExactSet clock or receiver isn't working, we suggest:
- Try rotating it 90 degrees. The antennas are directional
and you might be able to improve the signal strength by turning the
- Place the clock or receiver along a wall or near a
window that faces Fort Collins, Colorado.
- Locate the clock or receiver at least 1 or 2 meters away
from any computer monitors, which can cause interference (some monitors
have a scan frequency at or near the WWVB carrier frequency of 60 kHz).
- You are not in range of the broadcast, check the
- Your clock uses batteries, check them and replace if
- If nothing else works, take the clock outdoors at night
and power it down (remove the batteries or unplug it), then power it up
again to force it to look for the WWVB signal. If it works outdoors but
not indoors, you probably have a local interference problem inside your
house or building. If it doesnt work outdoors at night, its probably best
to return it and try a different model.
My clock is off by one or more hours
Remember, minutes and seconds are the same in all time zones, only hours are
different. If your clock is off by one or more hours, it probably has to do
with a time zone setting. Make sure you have properly selected your time
zone using the instructions that came with your radio-controlled clock.
you live in an area that does not observe Daylight Saving Time (Arizona,
Hawaii, parts of Indiana), make sure that DST is disabled on your
radio-controlled clock. Not all clocks have this feature, so you might have
to select another time zone to make your clock display the correct time when
DST is in effect.
Some radio-controlled clocks only allow you to select four different time
zones (Pacific, Mountain, Central, and Eastern). Some clocks allow you to
select any time zone, even those time zones that are outside the coverage
area. When purchasing a clock, make sure that it can handle your time zone.
For example, weve heard from a few users who purchased clocks in Hawaii but
cant select the Hawaiian Time Zone.
The clock is off by a few minutes or seconds
This can be due to a number of different problems as listed below:
Reception Problems - If your clock isnt currently receiving the
signal, the time will drift and gradually get further and further from
the correct time. Remember, if the signal isnt being received, your clock
isnt radio-controlled any longer, its just a regular quartz clock.
ExactSet digital radio-controlled clocks have an indicator on the
display that tells you if the signal is being received properly. If
you are not sure if the signal is being received, try powering down the
clock (remove the batteries), then turn it on again to see if it can
synchronize. If it doesnt, see the tips above for improving your
Checking your clock - There is no need to check a properly
working WWVB clock, it should always display the correct time. However,
you might want to check it if you suspect you have a problem. You can
check your clock by using the NIST web
clock, or by listening to
Radio Station WWV using a shortwave radio or telephone (dial
We switched to Daylight Saving Time, and my clock didnt change
This is probably due to a reception problem. Your clock or receiver hasnt
received the signal recently, so it didnt know about the time change.
ExactSet clocks have an indicator on the display that tells you if the
signal is being received properly. If you are not sure if the signal
is being received, try powering down the clock (remove the batteries), then
turn it on again to see if it can synchronize. If it doesnt, see the tips
above for improving your reception.
The clock switched to Daylight Saving Time,
but we don't observe DST where I live
Uncheck the "Automatically adjust clock for daylight saving
changes" under the time zone tab of the Windows Date/Time control panel
You should change your time zone setting during DST to make your clock
display the correct time
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ExactSet Radio Clocks