1200DD Series Digital Data Display Manual
Revision 1.8
1200DD - 1-1
1. OVERVIEW
The 1200DD Series Digital Data Displays are LED digital clocks with a 7-segment-digits display. They
may operate as a timecode-reading clock or as a digital SMPTE/EBU serial timecode reader, simply
displaying the input timecode. In addition to SMPTE/EBU timecode, the clock can operate on the internal
quartz time base, from IRIG-B, a GPS antenna or NTP. It can also be used as a display for the up/down
production timer feature of the Evertz 7800TM2-XIO-3G card. This multi-way reference capability allows
easy integration into new or existing clock systems.
The 1200DD series displays are offered in two sizes.
Model
Description
1200DD
2 RU display with 2.25” high digits
1201DD
1 RU display with 1.00” high digits
Throughout this manual the term
1200DD series
will be used to describe the displays when describing
common features. When necessary, the specific model numbers will be used to distinguish features only
available on some models.
The model 1200DD clock face has 2.25” tall digits that may display HH:MM:SS AM/PM or HH:MM:SS FF,
depending on the control settings. The model 1201DD clock face has 1.00” tall digits that may display
HH:MM:SS AM/PM or HH:MM:SS.FF, depending on the control settings. The brightness of the digital
LEDs is adjustable. Clock installation is simple when one of the time sources is available. Apply power,
connect time, and select an input source and the clock takes care of the rest, instantly setting to the
correct time.
If time source fails, the two small character displays flash twice per second to signal its absence in 12
hour mode and displays U in 24 hour mode. Any time discrepancy on return of timecode is instantly
corrected. This also applies to timecode changes such as Standard Time to Daylight Saving Time.
The 1200DD series displays may be preset to display an offset from local time. This local offset allows the
display of any or all time zones at one location. This offset is user-programmable from -12 hours to +12
hours. When no source of timecode is available, the 1200DD series displays may be configured as a
timecode generator, using its internal quartz crystal or GPS or IRIG-B or NTP.
When used as a generator, the 1200DD series displays can drive multiple high impedance, timecode
reading devices. If AC power is lost, the 1200DD series displays maintain time internally via a crystal
oscillator powered by a lithium battery. Self-setting to this time will occur if no input time source is
available on power up. The LTC output time is the same as the input if the input is LTC or IRIG, and it is
GMT if the input is GPS or NTP.
When the 1200DD has a valid input, it will automatically adjust its internal crystal oscillator so that if the
reference is lost, it will maintain accurate time for a longer period.
The rear panel input connectors for timecode and output are XLR connectors. The IRIG-B input is a BNC
and the NTP is a RJ-45 Ethernet connector. The GPS input is a DB9 connector. The GPS requires the –G
option to be purchased.
When operating with no time source, the clock can be accurately set by means of three miniature
pushbuttons on the front panel.
