UDC-5212 and DTD-5225 Digital Time/Date Display Clocks Installation and Operation Manual
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Chapter 1: UDC-5212 Universal Digital Clock
When used in timecode mode, the UDC always displays time in
24-hour format, without AM and PM indications. The digits may be
configured for HH:MM:SS display or MM:SS.FF display using DIP
Switch 1.
Secondary Reference Mode
The UDC-5212 will run as standard wall clock when no input timecode
is provided. Rear panel DIP Switch 4 selects the timebase to be used,
either the clock’s internal crystal, or the power line frequency
(50/60Hz). DIP Switch 6 must be in the CLOCK position.
Rear panel DIP Switch 2 should be switched to the RUN ON
SECONDARY position when the clock is used in this mode. When in
this position, the colon LEDs will not flash. Note that the clock will still
function without selecting RUN ON SECONDARY. However, the
colon LEDs will flash at the rate of twice per second to indicate the
absence of input timecode.
When operating in this mode, the time must be set manually using the
rear panel set switches, MANUAL SET, CW, and CCW. Once set,
however, the correct time is maintained even in the event of a power
failure. Upon the return of external power, the clock will automatically
self-set to the correct time. The internal battery-backed timekeeping
function will maintain time for up to four years in the absence of
external power.
Seconds Display
The perimeter LEDs may display seconds one at a time or in a sweep
fashion—leaving on each successive LED until the top of the minute is
reached. To enable the sweep display, use DIP Switch 5 to select EBU
(SWEEP SECONDS). For single LED per second display, place DIP
Switch 5 in the SMPTE position.
Auxiliary Offset
DIP Switch 3 allows access to a user-programmed auxiliary offset from
the input timecode’s user bits. However, the timecode source must have
the ability to generate the correct information in the user bits.
