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The Ambient ACL-204 is the original Timecode and Sync generator. The Ambient Lockit is the market leading portable, timecode and sync generator worldwide.

Like all Lockit devices, the ACL204 is based around a highly accurate, tunable, temperature compensated crystal for reliable synchronization of multiple devices without cables or fragile wireless transmission. The new ACN network generation adds even more accuracy and comfort to the system, while maintaining the renowned reliability.
Surpassing the already comprehensive facilities of its predecessor, the ACL204 not only covers all timecode rates and sync formats, it also allows the user to apply an offset to the TC output to compensate for the processing delay created in most digital cameras. 3D camera rigs can be made lighter and neater by utilizing the 2nd TC output while the sync output can be switched to drive a dual load.

The built-in ACN enables for 0.0ppm drift, wireless tc & remote control
The integrated transceiver and the 2nd Lemo socket can be used to interface with the ACN system. It also allows the ACL 204 to work as a fully functional, generator buffered wireless timecode transceiver. With firmware version 3.1 or higher the new c-jam mode does not stop after the first jam. It will resend smaller timestamps every 4 seconds.
All receiving units now compare their internal generated timecode with the highly accurate timestamp and pull up or down the generator speed until they are perfectly matched. This way a drift between all ACN devices on set can be avoided completely. When used in a network with a Master Lockit, all ACL204 units and other ACN Lockits can be displayed, named and remote controlled via the Master Lockit web interface.

Use your Lockit as computer Timecode & Sync Interface
Plugged in into a computer, the Lockit transforms into a highly accurate Midi Timecode Interface with LTC / Midi Timecode conversion. This enables ACL 204 to sync multiple cameras with a Pro Tools workstation.This is made possible by the ACL204's flexible, fully programmable FPGA architecture.
A front loaded OLED display will give instant visual feedback about the current configuration and assist while moving through the menu to make adjustments. This is now done on the fly with an easy to operate one-finger navigation system - no more need for screwdrivers or powercycling the unit.

SMPTE / EBU (23,976, 24, 25, 29.97, 30 fps, 29.97/30 drop frame)

NTSC: 59.94i
PAL: 50i
720p: 23.976, 24, 25, 29.97, 30, 50, 59.94, 60
1080i: 50, 59.94, 60
1080psF: 23.976, 24, 25, 29.97, 30
1080p: 23.976, 24, 25, 29.97, 30, 50, 59.94, 60
Word Clock: 32, 44.1, 48, 88.2, 96, 176.4, 192 KHz, pull-up / pull-down
Black Audio AES3: 24 Bit, Sample rates as above

An intelligent algorithm will prevent configuration of improper, mismatched TC and Sync rates or unintended alterations to the setup. Still being an easy-to-use TC and Sync box at the core, and powered by 2 AA cells in the familiar rugged footprint, the ACL204 can be considered the pinnacle of portable synchronization.


  • TC & TRX
  • ACN inside
  • Ext. Power: 5-18V Lemo / USB
  • Int. Power: 2x AA
  • OLED Display:
  • Metadata: RED cameras
  • Ethernet/WiFi: x
  • Specifications

  • Highly accurate timecode generator
  • Generator buffered timecode transceiver
  • Drift of less than 1 frame a day (~0,1ppm, 0ppm within the ACN)
  • Supports all SMPTE frame rates
  • Supports all standard video sync and word clock formats
  • Sunlight readable OLED Display
  • Adjustable timecode offset
  • Dual Sync Mode, 2 TC Out for 3D use
  • Midi timecode interface with LTC/MTC conversion
  • Built in ACN transceiver with internal antenna
  • RS232, USB port
  • Works 30 hours on 2 AA batteries
  • Robust machined and anodized aluminum body
  • Dimensions: 100 mm x 74 mm x 36 mm
  • Weight (without batteries): 250 g
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