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Clocks & Timers for Video

Videotek ADC-A12C31

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Item #:MO816774
Condition:Reference Item
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Model Description:
12 inches Precision Analog Clock Display, supports LTC using SMPTE timecode

Model Details

The Videotek® ADC-A12C31 is a precision analog clock containing a stepper motor drive and advanced, microprocessor-controlled electronics to provide an accurate delivery of time. The clock is designed with a powder-coated steel case for wall mount applications (mounting bracket supplied). The ADC-A12C31 supports LTC using SMPTE timecode. Clear labeling and an internal, LED-lit face make this clock readable from long distances. Standard power connection and BNC connection for the LTC are provided.


  • Battery backup retains time during loss of power or reference
  • Self-correcting hands once power and/or timecode reference is established and after loss of power and/or timecode reference and DST changes
  • Time zone offsets (to one second resolution)
  • DST (Daylight Savings Time) configuration
  • TCXO (Temperature Compensated Crystal Oscillator) for ± 1 minute per year accuracy when no reference available (free running)
  • All configuration settings retained in non-volatile flash memory
  • Second hand with sweep or step option
  • Status LED on clock face, located at the 6 o’clock position
  • Microprocessor-controlled stepper motor for reliable, accurate and quiet operation
  • Universal AC input voltage and frequency
  • Fully configurable via USB interface with supplied ADC-SET software
  • -11.5 to 12 hour time zone offsets in 30-minute increments
  • Self-correcting to non-drop frame timecode
  • SMPTE, EBU and IRIG?B (modulated and unmodulated) timecode support

  • Specifications:
    Input (timecode)
    TypeLongitudinal/Linear, forward running
    FormatsSMPTE 24 (Film), 25 (EBU) or 30 f/s non-drop frame
    IRIG-B (1) 1 kHz amplitude modulated, 3:1 modulation ratio
    IRIG-B (0) dc offset/level shifted/unmodulated/pulse width modulated/TTL level
    Nominal Level1.5 V pk-pk (0 dB/600)
    Level Range0.175 to 12 V pk-pk (-15 to 20 dBV)
    Impedance>100 k ohms
    ConnectorBNC female, single-ended, unbalanced
    Center PinTimecode In
    Outer ConductorTimecode Return
    Communications – I/O
    USBB type connect
    Power Requirements
    AC Input Voltage90 to 265 VAC
    AC Input Frequency47 to 63 Hz
    Power Consumption<7.5 W
    Input ConnectorIEC
    Power cordNorth American
    Power cord options available for UK, Europe, and Australia
    Internal Battery Circuit
    Rechargeable 17 mAh Manganese Lithium coin cell (Panasonic ML1220) and recharging circuit require no maintenance and retain TCXO and RTC (real-time clock) for two weeks (minimum holdover) without applied external power.

    Note: Clock hand alignment/calibration settings and configuration settings are maintained in non-volatile flash and are not affected by either loss of power or internal battery voltage.
    Physical12.5 in. (31.8 cm) round, black metal case with 12 in. face, 4.25 in. (10.8 cm) depth, polycarbonate lens
    Weight7.6 lbs (3.45 kg)
    Operating/Storage Temperature and Humidity
    Operating Temperature0 to 60° C
    Relative HumidityUp to 90% (non-condensing @ 25° C)
    Storage Temperature-40 to 85° C
    Relative HumidityUp to 90% (non-condensing @ 25° C)

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