CHAPTER 2 NEW FUNCTIONS2-7COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 20012.3 Enlargement/Reduction MethodThe machine is designed to use a higher scanning speed to keep up with the higher print-ing speed. Under specific conditions, it involves digital processing to enlarge/reduce images,thereby increasing scanning speed while allowing the scanner motor to operate at the rangeof speed of the GP605.When the ADF is used, the copying operations will normally be in stream reading mode;at a 200% to 400% ratio, however, fixed mode will be used.In book mode, all copying operations will be fixed mode.Digital processing is used in combination under the following conditions:• in fixed mode, between 25% and 49.9%• in stream reading mode, between 25% and 84.9%ChangeScanning speed in DirectDifference in rangeiR8500450 mm/sBy optical means, between 25%and 400%; in combination withdigital processing,(between 25% and 49.9% in fixedmode)(between 25% and 84.9% in streamreading mode; ADF use)GP605260 mm/sBetween 25% and 400% by opticalmeans (no digital processing)
