Ricoh 2400L Operator's Manual page 719

SENDING A FAX MESSAGE
Selecting the Halftone Type
This model has two types of Halftone: the Dither Process and the higher quality
Error Diffusion Process. To change the currently used Halftone type, perform the
following procedure.
1. Function 6 2 2 2 2 6 3 and Yes.
2. Yes.
The settings for switch 00 are now
shown on the bottom line of the display.
3. Press
until the settings for switch 10
are shown. You need to change digit 7.
If you wish change the setting press 7
on the ten key pad.
Speed mode: The machine will use the Basic Halftone Process.
Standard mode: The machine will use the higher quality Error Diffusion Process.
4. Finish: Yes and Function
Halftone Mode slows down the transmission speed, and may increase your
communication costs, especially if you use the Error Diffusion process.
Higher resolutions also do this. This is because these settings create larger
amounts of data to be sent.
Messages are transmitted the fastest if you use the standard resolution
setting, and keep Halftone off.
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ROUTINE OPERATION