ACL204
Rev. 4.10
©2016, Ambient Recording GmbH
16
ACN Menu
↑
Slave
Jam
Master
Ant
Only visible in ACN enabled modes
“C-Jam”
and
“TRX”
. “
Slave”
, “
Jam”
, and “
Master”
options are only
available in C-Jam mode
ACN Modes
“C-Jam”
is an enhanced multidirectional radio connection between ACN enabled units. Timecode is
continuously jammed via a master without compromising the autonomous accuracy of the Lockit
devices. Also, this mode serves for metadata networking when using a Master Lockit. For more detailed
information please refer to the dedicated ACN background chapter.
“TRX”
transforms the unit into an ACN based TC radio link with a twist. Each device is in hybrid mode
and will automatically turn into a transmitter once LTC or MIDI TC is applied. The generator will then
jam sync, follow external timecode on its framerate and transmit timecode, framerate and source
status to the receiving units which again kick in their freewheeling generators to follow: No TC output
with no TC connected or stopped, “standing” TC (repeating frame at frame rate) with standing TC on TX
input and running TC with TC source running. This combines the transparent action of a “classic”
timecode radio link with the drop-out proof concept of a freewheeling generator and the intelligent,
adjustment-free ACN algorithm.
Note: To further ease configuration and to avoid interference when running both modes in one
environment, selecting “C-Jam” and “TRX” have dedicated default channels which will
automatically be applied on switching the mode. Factory defaults are 18 for “C-Jam” and 11 for
“TRX” but you can select custom values for both modes in the Ant menu which will be valid until
a factory reset is performed.
C-Jam Sync Modes
“Slave”
: receive mode. This is the default and on power cycling it will fall back to this. If the unit once
had been jammed from a
“Master”
and initiated the dynamic C-Jam tune this will be indicated by “S” on
the main screen lower right. If that master is lost but C-Jam tune is still in operation “S” will alter to “(S)”.
Keep this mode for all units but the dedicated C-Jam master.
“Jam”
fires off a One-Time Jam burst, used best when only setting the free running TC generator is
required. Quite similar to the classic jam using a cable, you will need to re-jam units after battery
change or power cycle. As this is a singular operation the unit will fall back to the “Slave” mode in idle.
“Master”
: to enable this mode the generator needs to be set first (indicated by a green flashing LED).
The unit will resend timecode pulses every couple of seconds. “
Slaves”
will automatically rejam their
generator if not set and dynamically adjust their clock reference to best match the speed of the
“
Master”
. Thus, an accuracy window of 10us is achieved, reflecting synchronicity on video line level.
After replacing the batteries on either slave it will automatically jam to the set TC.
