The 1200DD & 1201DD are LED digital clocks with 7-segment-digits display. They may operate as a timecode-reading clock or as a SMPTE ST 12-1 linear timecode reader, simply displaying the input timecode. In addition to SMPTE ST 12-1 timecode, the clocks can operate on the internal quartz time base from IRIG-B, a GPS antenna or NTP. This multi-way reference capability allows easy integration into new or existing clock systems.

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 & 1201DD may be configured as timecode generators, using their internal quartz crystal. 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. The display will show this time if no input time source is available on power up. When operating with no time source, the clock can be accurately et by means of three miniature pushbuttons on the front panel.