Xerox DocuPrint Network Printer Series Guide, Manual

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2-10 XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES
Examples of nonstandard definitions
The following two dictionaries and their operators are examples of
nonstandard (product-specific) definitions.
Appearance consistency
To control the consistency of output between more than one printer,
you must consider the following:
•
printer resolution and resolution enhancement
•
printer imaging characteristics
•
font consistency
•
proprietary Postscript extensions
The following sections provide guidelines for ensuring consistency
between printers.
Printer resolution and resolution enhancement
The most obvious reason for inconsistent output between two
printing devices is that they have different resolutions. For example,
a 600 by 600 dpi printer has much smoother looking fonts and curves
than a 300 by 300 dpi device. For the same physical size (constant
frequency) of halftone, you get four times the number of gray levels
on a 600 by 600 dpi printer as on a 300 by 300 dpi device. If your
document contains scalable fonts or simple line art generated at 600
dpi, the differences between printing it at 300 and 600 dpi are subtle.
However, if your document contains bitmaps with a resolution of 600
dpi, printing it at 300 dpi causes a degradation in image quality.
Figure 2-1 provides an example of a 300 dpi image and a 600 dpi
Statusdict Userdict
a4tray a4
b5tray a4small
checkpassword b5
defaulttimeouts legal
jobtimeout letter
legaltray lettersmall
lettertray note
margins
manualfeedtimeout
pagecount
printername
product
revision
sccbatch
sccinteractive
setdefaulttimeouts
setjobtimeout
setmargins
setpassword
setprintername
setsccbatch
setsccinteractive
waittimeout