UDC-5212 and DTD-5225 Digital Time/Date Display Clocks Installation and Operation Manual
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Chapter 2: DTD-5225 Series Digital Time/Date Display
When DIP switch 3 on the DTD-5225 clock is in the USE AUX
OFFSET position, the auxiliary offset found in the input timecode’s
user bits is added to the input timecode. The clock then displays the
total. If no input timecode is available, DIP switch 3 has no effect. If the
user bits are incorrectly programmed, the offset is disregarded.
A programmed local offset is still in effect while using the auxiliary
offset. The local offset is totally transparent to the input timecode’s user
bit offset.
If input timecode is removed while USE OFFSET is selected, the clock
will retain the time with the offset added, not the original time.
Date Display
The DTD may display the date when used with a MTG-3901,
CSD-3901/3902, or CSD-5300 Master Clock System Driver. DIP
Switch 1 is used to select the date display format; either YY:MM:DD or
DD:MM:YY may be displayed.
Timecode Generator Mode
The DTD-5225 clock can also function as real time timecode generator,
essentially operating as a master clock. This timecode output may be
used to drive other clocks or timecode reading devices.
To configure the DTD as a timecode generator, an internal connector
must be transposed so that the rear panel speaker-type connectors
become the timecode output terminals.
To do this, remove the 4 small screws along the outside edge of the
clock. Carefully lift the out rear panel from the chassis.
Follow the two wires from the speaker-type terminals to their connector
on the PC board. The connector must be removed and reversed.
Normally, the wires on the connector are located at pin 1. Reversing this
will relocate the wires on the connector to pin 10. When completed,
return the rear panel to the chassis, and re-fasten the 4 screws.
After completing this procedure, the rear panel speaker-type terminals
will output real time timecode when DIP switch 4 is set to the
INTERNAL position. The clock uses the internal crystal for a timebase
when operated in this fashion.
Additionally, DIP switch 2 must be set to the RUN ON SECONDARY
position. This disables the flashing colons.
