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3.11 OPERATING THE 4025TR WITH BARCODED FILM STOCK
OPERATION
3.10.11 Using the Parallel Remote Inputs to select Film Control
Modes
The 4025TR is fitted with a nine pin sub miniature 'D' connector for
connection to the telecine. Three pins on the remote control connector
may be connected to tallies from the telecine, or to external toggle
switches, to program the film type and transfer rate. The pin connections
are described in Chapter 7 of this manual.
Mode changes will take effect when either a timecode or film edge number is
entered from the front panel, or when the telecine has achieved a full stop
condition.
Film Type select
Film Rate select
Figure 3-14: Parallel Remote Control of Film Type and Rate
Latent edge numbers have been present on motion picture negative film
stocks for many years in human readable form.
format has been specific to various manufacturers and film stock types. In
1988, Eastman Kodak, in conjunction with the Society of Motion Picture
and Television Engineers devised a new edge print that not only
standardizes the numbering format, but is also printed as a machine
readable barcode. Kodak calls this numbering system KeyKode. Other
film manufacturers have adopted this numbering standard and have each
given their version a proprietary name. For the sake of clarity we shall
refer to all of these implementations as KeyKode.
The 4025TR Film Footage Encoder interfaces to external KeyKode readers
manufactured by Evertz Microsystems, ARRI, Cinema Products or
Research In Motion. Each of these units consists of a bar code reader
pickup head, and a decoder device.
optical dark and light bar code into electronic signals and is designed to
mount on the telecine feed roller just before the film enters the gate. The
decoder receives these electronic signals from the pickup head, and sends
the decoded KeyKode number via a serial link to the 4025TR. The 4025TR
Film Footage Encoder automatically 'jams' the edge numbers into the time
code user bits or the secondary VITC.
When installing the pickup head on the telecine, an automatic alignment
procedure in the 4025TR calculates the exact perforation offset between
the head and the gate. This calibration procedure must be performed
Model 4025TR Film Footage Encoder Manual
Low =
35mm 16 Frms/key
High =
16mm 20 Frms/key
NTSC:
Low =
PAL:
Low =
The pickup head transforms the
24
High = 30
25
High = 25
The edge numbering
Page 3-55
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