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TC READER:*
tc reader: off*
tc reader: arri*
tc reader: matrix
OPERATION
When one of the automatic modes is selected the LED intensity can still be
manually adjusted from the kk intens menu, however the auto or hunt
routines may change this value whenever they are triggered. This feature
can be used to manually adjust the intensity until a bar code is read,
whereupon the auto routines will take over and find the optimal setting.
The auto and extended auto modes will only adjust the intensity when some
of the barcodes are being read. If no barcodes are being read you must
either use the hunt mode or manually adjust the intensity into the reading
range.
When the kk intens: hunt mode is selected and keykode is no longer
recognizable the 5550 searches for an illumination level which will produce
readable bar code. The hunt routine is based on the biphase from the
telecine to measure when a reasonable amount of film has gone by with no
keykode reads (typically 2 bar-codes worth). The 5550 will then adjust the
intensity down to the next major zone in search of readable bar code. The
5550 will cycle through the entire intensity range within approximately 6 to
8 feet of film and will continue to do so until bar code is read. Once a
barcode is read, then the 5550 will revert using the extended auto
algorithms to find the optimal intensity value.
Sometimes the 'hunt' routines can be activated inappropriately. The most
obvious example is when the film spools off the reels. The tach wheel on
the telecine may keep spinning and fool the 5550 into hunting for the
correct intensity setting for the missing keykode. As soon as a new roll of
film is loaded, the 5550 will find the appropriate intensity value again after a
few feet of the new roll pass through the head.
3.2.5. Turning on the Film Time Code Reader
When the one of the universal reader heads with either ARRI or Matrix
reader sensors is connected to the 5550 you will be able to enable either
the ARRI or Matrix Time code reader portion of the head and decoder.
(See section 3.3.5 for information on selecting the correct head type, and
details on which head models support ARRI and Matrix reading).
tc reader Selects whether the 5550 will read ARRI or Matrix time code or
not. This menu item is only available when the head model
menu item is set to uv and the correct head type is connected.
Select off to disable the Film Time Code reader.
Select arri to enable the ARRI Time Code reader
Select matrix to enable the Matrix Time Code reader
Model 5550 Universal Film Data Decoder Manual
Page 3-9
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