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If the Timecode numbers are not correct, check that you have set the correct Telecine Type
setting on the Telecine Setup Screen.
As a last resort, the Timecode numbers can be adjusted with respect to the Edge numbers
by adjusting the Dynamic Trim parameters.
These values should be adjusted with caution as they do not usually have to be
changed from their default values.
In 24 Fps 60i transfers, the pulldown of the reference frame is not guaranteed unless you
are using a device such as a Time Logic Controller to control the telecine. This means that
the reference film frame may correspond to more than one video frame, and that the exact
timecode / edge code numbering relationship is ambiguous except for A frame pulldowns.
9. After you have made any adjustments, park the telecine with the reference frame in the
gate. The burn in windows should show the original numbers you entered in step 4a) and
the Scan track value showing in the Encoder Status window should be the same as it was
after you did the Load Film operation in step 4a). If these numbers do not agree, It may
indicate that you are losing biphase counts. Check the instruction in the relevant section of
Chapter 2 on connecting the biphase. If the values are the same, repeat steps 4 through 6
until you have satisfactory results. Once you have verified the basic system timing, you may
proceed to the KeyKode reader installation.
3.4.
LEARNING THE KEYKODE READER HEAD OFFSET
When installing the pickup head on the telecine, there will be a fixed mechanical mounting offset
between the KeyKode reader head and the actual film frame in the gate. This offset will in general
change from installation to installation, but will be fixed for any given installation. Care should be taken
when installing and removing the reader head from the telecine, so that the same offset can be
maintained. The angle of the reader head, when it is mounted on the telecine may affect the head to
gate offset, and the reader reliability. In general it is desirable to align the reader head such that the
angle that the film enters and leaves the reader head is approximately the same. It may be desirable to
make an alignment mark on the telecine, to facilitate re-installation, should it become necessary to
remove the reader head.
The 9025TR uses separate head offset values for 16 mm and 35 mm film types for each transfer
speed. The KeyLog TRACKER™ software provides a wizard to guide you through the process of
learning each of the head offsets. Once calibrated, these head offsets are stored in the KeyLog
TRACKER™ Telecine Setup and are sent to the 9025TR each time a system configuration or project
configuration is applied. There is a separate list of head offsets stored in each Telecine Setup, so it is
desirable to learn all the head offset values you will need before creating additional Telecine setups. A
summary of the Head offsets is available using the Edit Telecine Setup screen or from the Telecine tab
of the configuration screen.
The Head offset learning procedure MUST be performed before the 9025TR will use
the KeyKode information it receives. The head offset for each film type and transfer
speed MUST be initialised for each combination used. You will not be able to save
configurations that use a film gauge with an unlearned head offset.
CALIBRATION
9025TR Series Film Footage Encoders Manual
Revision 1.3
Page 3-5
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