Canon fax basic 2000 서비스 매뉴얼

RECORDING SECTION

4–8

2.2

Reproduction Ratio Processing Section

The image is then reduced by one of the Reproduction ratio shown below.

After scaling, the image data is sent to the printing section.

(1) Regular reproduction

(2) Fixed reproduction

The image data is reduced by a reproduction ratio (fixed) that is set on the

user registration switches.

(3) Automatic reproduction

The image data is automatically reduced to fit on a single sheet of record-

ing paper even if the image data is longer than the recording paper.

(4) mm/inch conversion

Normally, the resolution of image data that is received in the G3 mode is

expressed using the millimeter unit system. The resolution of the printer,

however, is expressed using the inch unit system. For this reason, image

data of a resolution expressed in the millimeter unit system is converted to

resolution expressed in the inch unit system held by the printer. This is

called “mm/inch conversion.” mm/inch conversion is performed regardless

of whether or not scaling types (1) to (3) described above are performed.

Next, let’s describe an instance where image data of fine resolution is

printed on a 360 dpi (dots/inch) printer.

• Horizontal scanning direction

First, the mm system units are converted to inch system units. As one inch

is 25.4 mm:

→

8 (dots/mm)

25.4 (mm/inch) = 203.2 (dots/inch)

Next, the printer calculates how many dots are used to print a single dot of

the image data.

→

360 (dots/inch)

203.2 (dots/inch) = about 1.772

Size of

Image

Data

Size of

Recording

Paper

Reproduction

The image data is reduced by a ratio of 70%.

The image data is reduced by a ratio of 86%.

The image data is reduced by a ratio of 81%.