4.4 LTCin As Master Timecode Reference (v2.0)

Owned by Thomas Staiger
Last updated: Jan 10, 2017 by Georg Deisting
2 min read

just:out can receive the reference time from the NTP of the local machine but also from an external LTC timecode generator using the LTCin of an AJA device or the audio in or the Mac. Before such a signal can be used by just:out, the hardware must be configured to be able to receive the LTC signal.

These windows may look different and can offer other variations in function depending on the hardware and OS you are using. 

Even it is possible to read the timecode information from an external LTC source, the current day is always grabbed from the local machine. Because of this it is important that those two TC sources do not drift a lot, otherwise the wrong date information can be used after the restart of an engine.

Input Select

By default just:out uses the NTP (= network time protocol) of the local machine as the master timecode source. Because the NTP is more or less accurate we recommend to use a stable LTC source as master timecode. To synchronize your master timecode to a LTC source you can attach a LTC signal to the LTCin of your AJA device or the audio input of your Mac.

Supported AJA devices for this purpose are:

  • LHi
  • Kona3(G)
  • Kona 4(G)
  • Io XT
  • Io 4K

Timecode

Depending on your video device you have to configure the LTC/Ref setting in the Input Select configuration (KonaLHi) or the Input setting in the Timecode configuration (Kona3(4)G and IO device) like shown in this screenshot.

 Make sure that the incoming LTC signal is shown in the AJA control panel.

Sound Preference Pane

When using the audio input of the Mac you can see if the signal is being received in the Sound preference pane. Choose the audio input to which the LTC reference signal is attached to and check if there is a signal coming in. Once the LTC timecode is received you can configure just:out to use this timecode as the reference timecode for the playout.

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