2.1 Setting the Lockit TC generator from external source
A. External timecode.
Insert an external timecode source 0.5 volts up tp 5 volts pp. With successful jam
sync the LEDs will go from red to green, then flash irregularly for about two
seconds untill the PLL has locked and video / sync signal is put out, then go to
the normal once per second mode
If they were on green (unit was jam synced before and is being rejammed), the
green LED will flash like after first jam.
Note: If the lockit loses sync through loss of power one can use the machine it is
coupled to, to resync with timecode. Even if the machine has a drift of several
frames an hour, there will not be a frame lost if the Lockit is rejammed within one
minute. However it is best to rejam the lockit with one of the clockit units running
in the system to avoid errors.
B. Setting with Aaton Origen C. or Ambient Controller**.
The Lockit and all clockit units are Aaton compatible. The Lockit is connected to
the Origen C or Ambient Controller with an Ascii cable and setting and time code
comparisons can be carried out. After setting the LED goes green. Remove Ascii
cable.
If using the Ambient Controller ACC501, ASCII communication may also use the
IR interface.
Please note: If the ACC501 is set to IR in the ASCII menue, serial communication
via cable is disabled.
**The ASCII protocoll does not transfer frame rates only time. Thus when setting with
Aaton the frame rate must be set to the frame rate required. The timecode will be
generated at the frame rate set by the dip switches.
2.2 Time code jam mde.
With TC connected the Lockit will jam only once and not rejam until the TC source
is disconnected for over 3 seconds. After 3 seconds of no TC at the input, the
redetection of a readable TC at the input will induce a rejam. Also Aaton ASCII is
locked out for 3 seconds.
Of course Timecode can be disconnected after jamming when the LED has gone
green.
• The Lockit box can be used as a TC gearbox in a jam once and run
configuration that will hold sync fo about 0.5 hours. The Lockit box can be
set to desired frame rate and be jammed from another frame rate
Most Crystal controlled machines are not more than 10 ppm different. In a
jam and run situation in which the Lockit and source were 10 ppm different,
a jam and run would lead to 0.5 Frame difference after half an hour at 30
Fps. In practice this will probably be much less especially if the TC source
used for jam also comes from a Lockit box.. Sync will only work if integer
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