Printing Faxes At 300 Dpi Resolution - Ricoh FAX680MP Service Manual

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31 March, 1997

2.2.6 PRINTING FAXES AT 300 DPI RESOLUTION

Horizontal: AND
Vertical:AND
300 dpi
Horizontal Direction Process
AND
OR
To print received fax data in 300 x 300 dpi resolution, the machine converts the
resolution as shown in the diagram. After conversion, the machine gets 2592 dots
(1728 x 1.5 dots). However, the number of dots required for printing is 2400 (= 8" x
300 dpi). So, the machine reduces the print data using the reduction ratio specified
by Function 45. The default reduction ratio is 93% (≈ 2400/2592).
Cross Reference
Process used for converting main-scan resolution (horizontal) - Bit 5 of bit switch
C
Process used for converting sub-scan resolution (vertical) - Bit 6 of bit switch C
For best results, keep both settings at "AND".
Horizontal: AND
Vertical:OR
1/8 mm
Line Pairs
Line Pairs
Horizontal: OR
Vertical:AND
H905D010.vsd
2-5
PRINTER
Horizontal: OR
Vertical:OR
: Generated Black Dot

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