DTD-5230, DTD-5231, and DTD-5233 Installation and Operation Manual
9
Chapter 3: Operation
Clock Mode
To operate the DTD-523x as a timecode reading clock, the DIP
switch
1-6
must be in the
Clock
(closed) position.
No time setting is required when input timecode is provided to the
DTD-523x clock.
Once a valid SMPTE/EBU timecode is detected, the clock instantly
self-sets.
Timecode Failure
If there is a failure or an error with the input timecode, the DTD-523x
switches to secondary reference as selected by DIP switch
1-4
. Either
the clock’s own internal crystal or the power line frequency can be
selected as the secondary reference. Both provide the clock with a time
base during the absence of input timecode.
Note
Note that either a 50 Hz or 60 Hz power line frequency is suitable
for the time base since the clock automatically selects the correct
frequency available.
When signaling the failure of the input timecode, the colon LEDs on the
clock face flash at a rate of twice per second.
When correct timecode is reestablished, the clock self-sets to the new
time, and the colon LEDs stop flashing.
Timecode Error
If there is an error in the input timecode, the clock automatically
switches to the secondary reference, and the colon LEDs flash.
Time Display Format
When used in
Clock Mode
, the DTD-523x displays time in either
12-
or
24-hour
format. DIP switch
1-1
selects the display format:
•
12-hour
: Closed position; uses the AM/PM LEDs
•
24-hour
: Opened position; no LEDs
