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B-6 A-61133 March 2003
Image marks in both
Channels: simplex
or duplex film
In these films, the image mark sequence does not continue from
Channel A to Channel B (Simplex film is shown in the following
illustration).
Both channels are searched simultaneously from the beginning of the
film to the end of the film.
Table B-4 Image marks in both channels: simplex or duplex film
Image mark size Image mark size Image mark size Search program Number of levels
Medium in
Channel B
Small in
Channel A
15 2
Medium in
Channel B
All sizes of image
marks in
Channel A
16 2
All sizes of image
marks in
Channel B
All sizes of image
marks in
Channel A
17 2
Large in
Channel B
Medium in
Channel A
Small in
Channel A
21 3
Large in
Channel B
Medium in
Channel B
Small in
Channel A
22 3
All sizes of image
marks in Channel
A and Channel B
31 1