ARRI ALEXA 35 Body & PL Mount Set (LBUS) - Manual (Page 41)

Main Parameters 41
Info : Under- or overexposed images may cause the automatic white balance to fail. Always trigger
automatic white balance with properly exposed images.
User Button Auto WB supports to quickly execute an auto white balance.
9.7 Timecode
Timecode ensures that each frame of recorded material can be identified with a unique value and
synchronized with the appropriate media, such as audio or the second camera in a multicamera
application. In conjunction with other metadata, such as reel names, all recorded media retains its
unique identity.
Timecode Run Mode
Rec Run timecode is often used on single camera productions that are either MOS or use a dumb slate
to synchronize picture and sound. Rec Run timecode guarantees continuous timecode on all recorded
data. The timecode increments only during recording, by one frame for each image generated by the
sensor. Rec Run timecode also works with over- and undercranking.
Free Run timecode is often used on multi camera productions with sync sound, picture/sound timecode
match and allows for easy syncing in post.
The camera can be set to timecode mode
Jam Sync , in which it samples the timecode value once from
the timecode connector and then continues counting based on its own high precision crystal clock. The
timecode source can be disconnected from the camera after jamming in Jam Sync mode. This mode
ensures stable timecode with an offset of less than one frame for each eight hours, after which the
camera has to be re-jammed.
Alternatively, the camera can be set to timecode mode
Regen (regenerate). In Regen mode, the
camera uses the timecode value of the external timecode source. This ensures correct timecode for an
infinite duration, but the timecode source must remain connected to the camera. Please note that while
recording, the camera ignores external timecode and uses its internal clock to avoid potential timecode
jumps, which can occur due to connection problems such as a faulty timecode cable for example.
► Select
HOME > TC > Options > Run Mode .
Following options are available:
Rec Run Timecode increases during recording only. The timecode value increases with every frame
generated by the sensor while recording.
Free Run Timecode increases with every new frame generated by the sensor, independently from
recording.
Free Run timecode is only possible if the sensor frame rate matches the project rate. If the camera
is over- or undercranking, the timecode frame rate will no longer match the sensor frame rate,
and timecode values would either be duplicated or dropped. To prevent this, the camera will
automatically switch to run mode Rec Run when the sensor frame rate is changed. When you set
the sensor frame rate back to equal the project frame rate, the timecode will recall the previous free
run timecode.
Timecode Mode
► Select HOME > TC > Options > Mode .
You have the following options: