QMS PS 410, User Manual

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Introduction
You may never need to change printer languages. Your printer has
Emulation Sensing Processor (ESP); it samples the data at the
beginning of a file and invokes the correct language (PostScript,
HP PCL, or an optional installed emulation)—without the user
having to change switch settings or send software commands ahead
of jobs. ESP is the factory default setting.
However, if your printing needs require it, you may configure a
particular port (or all the ports) to do only PostScript printing, only
HP LaserJet series II printing, or only another optional emulation.
You may reconfigure ports either through the PS Executive Series
Utilities or through direct PostScript software commands.
Instructions for both methods are given in this chapter; however, it
is easiest to use the PS Executive Series Utilities for
reconfiguration.
How ESP Works
Typically, when you install application software, you select the
printer driver specific to the printer to which you expect to print.
From that point on, the application prepares files in that particular
printer language. Since most printers only understand their native
language, files prepared in other printer languages print incorrectly.
A file prepared in HP PCL and sent to a LaserJet printer usually
prints incorrectly when sent to a PostScript printer; PostScript
printers normally understand only PostScript.
Chapter 3
S e l e c t i n g P r i n t e r L a n g u a g e s 3 - 1