Table of Contents
Advertisement
4.4 ARRI TIME CODE OPTION
$
$
OPTIONAL SOFTWARE
ARRI timecode is exposed onto the film in the camera, and is normally
recorded at the film frame rate. This timecode is recovered from the film by
the Evertz 5500A KeyKode/ARRI code decoder and sent to the 4025TR as
LTC. The 4025TR converts this incoming code to the video frame rate and
inserts it into the Audio Time code register. The Audio time code can in
turn be placed into the LTC, allowing an audio recorder with identical code
to chase lock, thus providing for automatic synchronization of the audio
elements. The Audio timecode is updated from the telecine biphase in the
event that the ARRI code is not coming in. In addition, the user has the
ability to extend the preroll time available by updating the ARRI code from
the middle of the shot then updating locked to the biphase only during the
preroll time.
4.4.1
Hardware Requirements
The following jumpers must be configured specially:
611
J5 must be set to the Ext. Sync position (to the right) in order to
transfer the Sync from the ARRI timecode to the 615 board.
Normally this jumper will already be in the correct position on your 4025TR
unit, however it is essential to verify that the jumper is set correctly in order
for the optional ARRI software to work correctly.
4.4.2
Connecting the ARRI Code Reader.
Follow the directions in section 2.13 and section 8.2 of this manual for
connecting the KeyKode reader portion of the 5500A KeyKode/ARRI Code
decoder. These are contained in Chapter 8.
Connect the timecode output from the 5500A to the LTC input of the
4025TR. Set the RDR MAPPING menu item to VITC LTC so that the
Audio reader is LTC. When you put the telecine in Play, the 5500A TC
LED should be On indicating that the 5500A is reading the code from the
film. The 5500A will generate LTC from the ARRI code and send it to the
4025TR. When valid code is coming in to the LTC reader of the 4025TR,
the LTC 1 code LED will be on.
The incoming code is assumed to be at the same speed as the film transfer
rate setting of the 4025TR. This means for films transferred at 25 frames per
second, that the timecode frames will be numbered from 0 to 24, etc. (i.e. film
was shot at 25 FPS)
Model 4025TR Film Footage Encoder Manual
Page 4-8
Advertisement
Table of Contents
