Masterclock
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23
Configuration
STATUS LED (LIGHT EMITTING DIODE)
The LED colons on the display will follow the following protocol
after power is applied:
TIME ZONE OFFSETS
The CLDTCD12 digital time display maintains time as UTC
initially. A Time Zone offset or bias can be provided to adjust the
time for display purposes. A bias can be set as a positive (+) or
negative (-) value. Expect a resolution of one second.
DAYLIGHT SAVING TIME
An automatic Daylight Saving Time (DST)
adjustment can be
configured separately and in addition to a Time Zone offset. DST
begins on the second Sunday of March at 2:00 AM (Local Time)
and ends the first Sunday of November at 2:00 AM (Local Time).
EU STANDARD – EUROPEAN UNION
In the European Union, daylight change times are defined
relative to the UTC time of day. Summertime Period begins at
1:00 AM, UTC on the last Sunday of March and ends at 1:00 AM,
UTC on the last Sunday of October.
FREEWHEELING ACCURACY
The CLDTCD12 has built-in provisions to allow it to freewheel
and maintain accuracy for extended periods in the absence of
Time Code. These features also allow the unit to be set manually
and run without Time Code with precision.
TCXO AND RTC CIRCUIT
The CLDTCD12 contains a precision
TCXO (Temperature
Compensated Crystal Oscillator)
and
RTC (Real Time Clock)
circuit allowing the clock to maintain an accuracy of ± 1 minute
per year to the last known Time Code input (±165 mSec per day)
when Time Code is not present or cannot be decoded (i.e.
freewheeling mode)
MAINTENANCE-FREE RECHARGEABLE BATTERY
The RTC and TCXO are maintained continuously from a
rechargeable battery circuit during periods of power outage.
Minimum holdover period is two weeks with a fully-charged
battery under constant drain.
DEFAULT CONFIGURATION
The factory defaults may be restored by using the
WinDiscovery
program or by using the reset button at the rear of each clock.
If the Time Code input
is
different from UTC, do not
adjust the Time Zone and/or DST
offset. These will adjust
automatically.
European customers:
Please
carefully consult the section
entitled “
Device Settings
” for
details on setting your
“
Summertime Period.
”
Daylight Savings Time (DST)
adjustments
must be configured
using the daylight time option
and not with the Time Zone
offset option in order to ensure
proper year-around operation.
LED
STATE
STATUS INDICATION
Flashing
No Reference:
The
CLDTCD12 is not able
to reference Time
Code
On Solid
Referenced Time:
The
CLDTCD12 is receiving
time referenced from
a Time Code
