Specifications

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Users Manual grandMA Version 3.0
7.1 Timecode
Pre Roll & After Roll, Dropout EliminationPre Roll & After Roll, Dropout Elimination
Pre Roll & After Roll, Dropout EliminationPre Roll & After Roll, Dropout Elimination
Pre Roll & After Roll, Dropout Elimination
Due to the fact that SMPTE is an analogue signal, fluctuations can occur. Very often there are temporary errors in
the recorded SMPTE signal which are called dropouts.
As such misleading small errors should of course not affect the board, it filters out these errors automatically.
Therefore the desk is filtering out these errors.
This filter is controlled by two values:
PRE ROLLPRE ROLL
PRE ROLLPRE ROLL
PRE ROLL and
AFTER ROLLAFTER ROLL
AFTER ROLLAFTER ROLL
AFTER ROLL.
PRE ROLLPRE ROLL
PRE ROLLPRE ROLL
PRE ROLL defines the time that a signal must be continuously good, before it is accepted by the console.
A small pre roll means that your console is reacting faster to incoming SMPTE signals.
AFTER ROLLAFTER ROLL
AFTER ROLLAFTER ROLL
AFTER ROLL is defining the time that a signal must be continuously bad or missing, before it is really assumed to
be off. During the after roll time, the console continues the show, using its internal time base.
A small after roll means that your console stops faster after a missing SMPTE signal, but it also reacts faster to errors
in the SMPTE signal.
The settings for pre roll and after roll can be found in the
context menu of the timecode poolcontext menu of the timecode pool
context menu of the timecode poolcontext menu of the timecode pool
context menu of the timecode pool.
The names for pre roll and after roll have a historical reason. At the beginning of the timecode era , the huge tapes
in the machines which contained timecode and audio signals where really visibly rolling .
Manually Changing Current TimeManually Changing Current Time
Manually Changing Current TimeManually Changing Current Time
Manually Changing Current Time
If the show is playing back or recording with external sync, it is not possible to change the time manually.
There are many different ways to change the current time of your show:
With the mouse in graphic mode:With the mouse in graphic mode:
With the mouse in graphic mode:With the mouse in graphic mode:
With the mouse in graphic mode:
- left mouse click somewhere into the timeline
With the encoder:With the encoder:
With the encoder:With the encoder:
With the encoder:
- Turn the time encoder (leftmost) to change the current time. Each click on the encoder means one frame.
- If you press and turn this encoder simultaneously, each click means one second.
- If you press the encoder without turning, you can enter an absolute time.
With the jump to breakpoint commands:With the jump to breakpoint commands:
With the jump to breakpoint commands:With the jump to breakpoint commands:
With the jump to breakpoint commands:
- You will find them as the outer playback symbols in the timecode control bar and as command line functions
<<< and >>>.
- Time will jump to the next available breakpoint in the given direction.
With the event encoder (second) in the bar:With the event encoder (second) in the bar:
With the event encoder (second) in the bar:With the event encoder (second) in the bar:
With the event encoder (second) in the bar:
- Whenever you select a new event , time is jumping to the exact time of that event.