Xerox 721P87491 User Manual

Xerox DocuPrint Network Printer Series
Guide to Using Page Description Languages

Version 7.1
August 2000
721P87491

Xerox Corporation
701 S. Aviation Boulevard
El Segundo, CA 90245

©1997, 1998, 1999, 2000 by Xerox Corporation. All rights reserved.

Copyright protection claimed includes all forms and matters of
copyrightable material and information now allowed by statutory or
judicial law or hereinafter granted, including without limitation,
material generated from the software programs which are displayed
on the screen, such as icons, screen displays, looks, etc.

Printed in the United States of America.

Publication number: 721P87491

Xerox® and all Xerox products mentioned in this publication are
trademarks of Xerox Corporation. Products and trademarks of other
companies are also acknowledged.

Changes are periodically made to this document. Changes, technical
inaccuracies, and typographic errors will be corrected in subsequent
editions.

Laser safety

Warning: Adjustments, use of controls, or performance of

!

procedures other than those specified herein may result in
hazardous light exposure.

The Xerox DocuPrint printers are certified to comply with the
performance standards of the U.S. Department of Health, Education,
and Welfare for Class 1 laser products. Class 1 laser products do not
emit hazardous radiation. The DocuPrint printers do not emit
hazardous radiation because the laser beam is completely enclosed
during all modes of customer operation.

The laser danger labels on the system are for Xerox service
representatives and are on or near panels or shields that must be
removed with a tool. DO NOT REMOVE LABELED PANELS OR

PANELS NEAR LABELS. ONLY XEROX SERVICE
REPRESENTATIVES HAVE ACCESS TO THESE PANELS.



Ozone information

Operation safety

This label is inside the left door, on the machine frame just above the
directions for clearing a jam in area 4.

This product produces ozone during normal operation. The amount
of ozone produced depends on copy volume. Ozone is heavier than
air. The environmental parameters specified in the Xerox installation
instructions ensure that concentration levels are within safe limits. If
you need additional information concerning ozone, call 1-800-828­6571 to request the Xerox publication 600P83222, OZONE.

Your Xerox equipment and supplies have been designed and tested
to meet strict safety requirements. They have been approved by
safety agencies, and they comply with environmental standards.
Please observe the following precautions to ensure your continued
safety.

• Always connect equipment to a properly grounded electrical

outlet. If in doubt, have the outlet checked by a qualified
electrician.

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES iii

Warning: Improper connection of the equipment grounding

!

conductor may result in risk of electrical shock.



• Never use a ground adapter plug to connect equipment to an

electrical outlet that lacks a ground connection terminal.

• Always place equipment on a solid support surface with

adequate strength for its weight.

• Always use materials and supplies specifically designed for

your Xerox equipment. Use of unsuitable materials may result
in poor performance and may create a hazardous situation.

• Never move either the printer or the Printer Controller without

first contacting Xerox for approval.

• Never attempt any maintenance that is not specifically

described in this documentation.

• Never remove any covers or guards that are fastened with

screws. There are no operator-serviceable areas within these
covers.

• Never override electrical or mechanical interlocks.

• Never use supplies or cleaning materials for other than their

intended purposes. Keep all materials out of the reach of
children.

• Never operate the equipment if you notice unusual noises or

odors. Disconnect the power cord from the electrical outlet and
call service to correct the problem.

If you need any additional safety information concerning the
equipment or materials Xerox supplies, call Xerox Product Safety at
the following toll-free number in the United States:

1-800-828-6571

For customers outside the United States, contatct your local Xerox
operating company.

iv XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

Table of contents

Laser safety iii

Ozone information iii

Operation safety iii

Introduction ix

About this guide ix

Contents ix

Conventions ix

Related publications xi

Related information xi

PostScript publications xi

HP PCL 5 publications xii

VIPP publication xii

1. PCL 5 1-1

Maintaining image quality 1-1

PCL 5 media support 1-3

PCL 5 font support 1-3

PCL command support 1-5

PJL commands 1-5

PCL Copy command 1-5

PCL Duplex commands 1-7

PCL Job Separation command 1-8

PCL media selection 1-9

PCL Paper Source command (tray assignment) 1-9

Precedence in selecting media 1-10

PCL Output Bin command 1-11

PCL Offset Registration commands 1-11

PCL 5 coding recommendations 1-12

PCL 5c support 1-12

PCL 5c coding recommendations 1-13

PCL 5c functions not applicable to DocuPrint NPS 1-13

Driver recommendations for PCL 5c 1-14

Limitations for custom PCL 5c drivers 1-14

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES v

TABLE OF CONTENTS

2. PostScript 2-1

Implementation-dependent operations 2-1

Floating-point arithmetic and math operators 2-1

Coordinate system default matrix 2-1

Fonts 2-2

Loading fonts 2-3

User-defined fonts 2-3

Type 1 fonts 2-4

Using Adobe Type 1 fonts 2-4

Producing Type 1 fonts for use with DocuPrint 2-5

Using a Type 1 font in a document 2-5

PostScript with embedded PJL commands 2-6

PostScript language extensions 2-6

System Dict 2-6

User Dict 2-7

Server Dict 2-7

Status Dict 2-8

Miscellaneous: IdleTime Dict, Printer Dict, and Execution Dict 2-8

IdleTime Dictionary 2-8

Printer Dictionary 2-9

Execution Dictionary 2-9

Nonstandard definitions 2-9

Examples of nonstandard definitions 2-10

Appearance consistency 2-10

Printer resolution and resolution enhancement 2-10

Printer imaging characteristics 2-12

Font consistency 2-13

Proprietary PostScript extensions 2-13

Control-D as binary data and end-of-job 2-14

Control-Z and superfluous errors 2-14

Solution to control-Z and control-D problems 2-15

Multiple jobs in one input file 2-16

DocuPrint NPS implementation of PostScript Level 2 2-17

Simulated mixed plex 2-17

Printer Controller operations 2-18

Scan conversion details 2-18

Stroke 2-18

Fill 2-19

Shapes 2-19

Zero-width lines (strokes) 2-20

vi XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

TABLE OF CONTENTS

Curved shapes 2-20

Images 2-20

Image quality 2-21

Rendering of color and gray values: transfer function 2-22

PostScript printer description (PPD) files 2-23

Implementation limits 2-23

File operators and standard devices 2-24

Path limits 2-25

PostScript VM limits 2-25

SetCacheDevice 2-25

Device orientation and setscreen operator 2-25

PostScript storage object size limits 2-26

Obsolete operators—banddevice, framedevice, renderbands 2-26

Arc to Bezier conversion—pathforall 2-26

Creating the necessary PostScript CCITT Group 3 and 4 2-27

Print performance related to image printing 2-27

Scan order and rotation 2-27

Purpose 2-28

Considerations 2-31

Summary 2-31

Scan resolution and scaling 2-32

3. VIPP 3-1

Functionality 3-2

Operating environment 3-2

VIPP line mode extension (XGFNub) 3-3

Index INDEX-1

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES vii

TABLE OF CONTENTS

viii XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

About this guide

Introduction

The Xerox DocuPrint Network Printing Series Guide to Using PDL
describes how the PostScript, HP PCL 5, and VIPP (formerly XGF)
page description languages (PDLs) are implemented on the Xerox
DocuPrint NPS printers.

This document is for users who will be submitting PostScript, HP
PCL 5, Decomposition Service, and VIPP jobs to the DocuPrint
printers. These users should be familiar with the applications they are
using to generate print jobs. This document is also for PostScript, HP
PCL 5, and VIPP programmers who will be creating applications
since it defines the features that are not supported for each PDL. It is
assumed that these programmers have a working knowledge of the
language they are working in. For specific reference information,
refer to the “Related information” section in this guide.

Contents

Conventions

Before using this guide, become familiar with its contents and
conventions.

This section lists the contents of this guide:

• Chapter 1, “PCL 5,” provides information about how to use PCL

5 with your DocuPrint printer.

• Chapter 2, “PostScript,” contains the information you need to

use PostScript with your DocuPrint printer.

• Chapter 3, “VIPP,” provides instructions for using Variable Data

Intelligent PostScript PrintWare (formerly XGF) with your
DocuPrint.

This document uses the following conventions:

• All caps and angle brackets—Within procedures, the names of

keys are shown in all caps within angle brackets (for example,
press <RETURN>).

• Angle brackets—Variable information, or the position of a

specified argument in the command syntax, appears in angle
brackets (for example, List Fonts <Pattern>).

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES ix

INTRODUCTION

• Bold—Within procedures, text and numbers that you enter are

shown in bold (for example, enter privilege operator).

• “Enter”—Within procedures, the two-step process of keying in

data and pressing <RETURN> <ENTER> (for example,
enter y).

• Italics—Document and library names are shown in italics (for

example, the Xerox DocuPrint Publishing Series Guide to
Performing Routine Maintenance).

• Quotes—Keywords you can enter as arguments appear in

quotes (for example, “USLetter”).

• Vertical bars—Alternatives to specified arguments are

separated by vertical bars (for example, Set Time <Time |
Remote Host Name | IP Address>).

Note: Notes are hints that help you perform a task or understand
the text.

Caution: Cautions alert you to an action that could damage
hardware or software.

Warning: Warnings alert you to conditions that may affect the

!

safety of people.



x XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

Related publications

INTRODUCTION

The Xerox DocuPrint Network Printer Series includes the following
documents:

Decomposition Service and Tools Guide

Guide to Configuring and Managing the System

Guide to Managing Print Jobs

Guide to Performing Routine Maintenance

Guide to Submitting Jobs from the Client

Guide to Using Page Description Language

Installation Planning Guide

Messages Guide

System Overview Guide

Troubleshooting Guide

Glossary

Master Index

Related information

Customer Information Quick Reference Card

Printer Controller Commands Quick Reference Card

Submitting your Jobs from Macintosh Quick Reference Card

Submitting your Jobs from UNIX & DOS Quick Reference Card

Submitting your Jobs from Windows NT 4.0 (QuickPrint) Quick
Reference Card

Submitting your Jobs Using Windows NT 4.0 Drivers Quick
Reference Card

The documentation set also includes an electronic version, the
DocuPrint NPS Interactive Customer Documentation CD.

You can locate additional information related to PostScript or HP
PCL 5 in the publications listed in this section. For a complete list and
description of available documentation, refer to the Xerox
Documentation Catalog or call the Xerox Documentation and
Software Services at 1-800-445-5554 for ordering information in the
United States. For customers outside the United States, contact your
local Xerox operating company.

PostScript publications

The following is a list of PostScript publications:

• PostScript Language Reference Manual, first edition, sixth

printing, Addison-Wesley, April 1987, Adobe Systems,
Incorporated

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES xi

INTRODUCTION

• PostScript Language Reference Manual, second edition,

Addison-Wesley, January 1991, Adobe Systems, Incorporated.
(This document defines both PostScript Level 1 and Level 2.)

• Adobe Type 1 Font Format, 1990, Adobe Systems,

Incorporated

• LaserWriter Reference, Addison-Wesley, October 1988, Apple

Computer, Incorporated

• PostScript Language Program Design, 1988, Adobe Systems,

Incorporated

• PostScript Language Tutorial and Cookbook, 1986, Adobe

Systems, Incorporated

• PostScript Printer Description File Format Specification, Version

4.2, March 29, 1994, Adobe Systems, Incorporated

• Real World PostScript, 1988, Addison-Wesley

HP PCL 5 publications

The following is a list of HP PCL 5 publications:

• Hewlett Packard Printer Job Language Technical Reference

Manual, September 1994

VIPP publication

• Hewlett Packard PCL 5 Printer Language Technical Reference

Manual, October 1992

• Hewlett Packard PCL 5 Comparison Guide, October 1997

• Hewlett Packard PCL 5 Color Technical Reference Manual, May

1996

Xerox Variable Data Intelligent PostScript PrintWare (VIPP)
Reference Manual

xii XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

1. 1PCL 5

The DocuPrint NPS system supports the following functions for
source documents:

• On monochrome systems, printing of PCL 5e masters

containing PCL commands, HP-GL/2 commands, fonts, and
data to be printed.

• On highlight color models, printing of PCL 5e monochrome or

PCL 5c color masters containing PCL commands, HP-GL/2
commands, fonts, and data to be printed.

Jobs can be submitted using the HP LaserJet 4 or LaserJet 4Si print
drivers for monochrome printing with PCL 5e, or the HP Color
LaserJet for highlight color printing with PCL 5c.

DocuPrint NPS supports most HP PCL commands, features, and
fonts, including those for PCL (the printer control language) and HP­GL/2 (the vector graphics language). The implementation of PCL 5e
on DocuPrint NPS emulates the HP LaserJet 4. The implementation
of PCL 5c on DocuPrint NPS emulates the HP Color LaserJet. This
chapter provides specific information about the support available.

Maintaining image quality

Refer to your Hewlett Packard PCL 5 printer language publications
for more information on PCL.

There is a DocuPrint NPS Change PCL Parameters command that
allows you to configure your PCL printing environment. Refer to the
Guide to Configuring and Managing the System, “Utility commands”
for more information.

Note: In PCL commands referenced in this chapter, the sign # is
replaced by a number.

DocuPrint Models 4050, 4090, 4850, and 4890 NPS provide a
resolution of 300 dots per inch (dpi), and Models 92C, 96, 4635 and
180 NPS provide resolution of 600 dots per inch. If your PDL contains
scalable fonts or simple vector graphics and line art generated at 600
dpi, the differences in printing at 300 or 600 dpi are subtle. However,
if your PDL contains bitmaps with a resolution of 600 dpi, printing at
300 dpi causes a degradation in image quality. To preserve image
quality, regenerate the bitmaps at the printer resolution of 300 dpi or
regenerate them as simple line art. The 600 dpi printers can accept
jobs with resources in either 300 or 600 dpi.

Note: Though you can print documents containing 300 dpi bitmaps
on a 600 dpi printer, there can be an impact on performance as the
printer processes the image for 600 dpi printing.

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES 1-1

PCL 5

Note: For PCL jobs, DocuPrint NPS supports 300 and 600 dpi
printing only.

To obtain the best image quality on the DocuPrint NPS, choose the
correct printer setup attributes when generating a document on your
personal computer.

Refer to the “Appearance Consistency” section in the “PostScript”
chapter for more information on resolution.

The following table shows the recommended printer settings in order
of preference:

• The recommended choice is listed in the 300 dpi vector

graphics settings column. The print quality of an object that is
created in HP-GL/2 mode is very consistent. Because the
image is not a bitmap, the data is not skewed.

• The second choice is listed in the 600 dpi vector graphics

settings column. Because you are using an image that is not a
bitmap, the data will not be skewed and the differences would
be difficult to detect.

• The last choice is listed in the 300 dpi raster graphics settings

column. The print quality deteriorates if the image is a
rasterized bitmap, which leaves some white space where the
bits are not formulated.

Table 1-1. PCL settings

300 dpi

Setting

Resolution 300 600 300

Page protection OFF OFF OFF

Orientation Portrait Portrait Portrait

Memory 2 2 2

Option…
Graphics mode

Option…
Graphics quality

Option…
Halftoning

Option…
Print quality

vector graphics

HP-GL/2 HP-GL/2 RASTER

HIGH HIGH HIGH

Photographic images Photographic images Photographic images

Printer default Printer default Printer default

Keep the following points in mind when preparing your images and
setting print attributes:

600 dpi
vector graphics

300 dpi
raster graphics

• Page protection, orientation, and memory are not values that

affect the image quality.

• Setting the graphics quality to HIGH allows for the best possible

output.

• Setting print quality to printer default allows the printer to

determine the best match for the job.

• The DocuPrint 92C NPS can produce a single-pixel line.

However, because of the many variables involved, such as print

1-2 XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

PCL 5 media support

PCL 5

density settings and line placement on the page, Xerox cannot
guarantee the quality of these single-pixel lines. Specific
questions regarding single-pixel line printing for your application
should be directed to your Xerox service engineer.

Acceptable sizes for DocuPrint Models 4050, 4090, 4850, 4890, or
92C are “USLetter,” “USLegal,” “A4,” and “nxn.”

Acceptable sizes for DocuPrint Model 96, 4635, and 180 are
“USLetter,” “USLegal,” “USLedger,” “Tabloid,” “A3,” “A4,” and “B4.”

Note: For PCL jobs, custom paper sizes and mixed paper sizes
within a PCL job are supported as of release 7.x.

For more information on how PCL media commands are interpreted
on DocuPrint NPS, refer to the section “PCL media selection” in this
chapter.

PCL 5 font support

DocuPrint supports most PCL 5 fonts. Table 1-2 lists the internal, HP
LaserJet compatible fonts installed with the system:

• One bitmap font

• 45 scalable fonts:

— 35 Intellifont FAIS typefaces

— 10 TrueType typefaces

PCL fonts may be downloaded within a PCL job.

Note: The DocuPrint NPS PCL 5e and 5c interpreters support use
of downloaded PCL fonts or macros by setting the proper parameter
using the Change PCL Parameters command. Refer to the Guide to
Configuring and Managing the System chapter “Setting system
defaults.”

PCL Intellifont FAIS typefaces and PCL bitmap fonts may be
permanently installed using the Install PCL Fonts From Floppy
command.

PCL bitmap fonts must be in the PCL soft font format for HP LaserJet
printers. A PCL bitmap font contains a font header and a set of
character definitions. The PCL format 0 (zero) and format 20 font
headers are supported for PCL bitmap fonts. Refer to your Hewlett
Packard PCL 5 printer language publications for details on the font
header and character descriptions.

Installation of other font types is not supported.

For MICR systems, a special DocuPrint NPS MICR font floppy is
available. It contains the PCL bitmap font named E13B required for
MICR applications. See the Guide to Configuring and Managing the

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES 1-3

PCL 5

System chapter on “MICR Printing” for more information. Refer also
to the Generic MICR Fundamentals Guide.

Note: Fonts installed using the “Install PCL Fonts from Floppy”
command cannot be selected by font ID. They must be selected by
characteristics.

Only fonts installed using this command can be deleted using the
Delete Fonts command. PCL fonts installed with the system
software cannot be deleted.

Refer to the Xerox DocuPrint Network Printer Series Guide for
Configuring and Managing the System for information on loading
fonts from floppy and from CD-ROM.

Table 1-2.PCL 5 fonts installed with NPS software

Intellifont Typeface

CG Times Medium, Italic, Bold, Bold Italic

Univers Medium, Italic, Bold, Bold Italic

Univers Condensed Medium, Italic, Bold, Bold Italic

Courier Medium, Italic, Bold, Bold Italic

Letter Gothic Medium, Italic, Bold

Albertus Medium (semi-bold), Extra Bold

Antique Olive Medium, Italic, Bold

Clarendon Condensed Bold

Coronet Medium Italic

Garamond Antiqua (Medium), Kursiv (Italic), Halbfett (Bold), Kursiv Halbfett (Bold

Italic)

Marigold Medium

CG Omega Medium, Italic, Bold, Bold Italic

TrueType Typeface

Arial Medium, Italic, Bold, Bold Italic

Times New Roman Medium, Italic, Bold, Bold Italic

Symbol Medium

Wingdings Medium

Bitmap Typeface

Line Printer 16.67 pitch/8.5 point medium

1-4 XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

PCL command support

PJL commands

PCL Copy command

PCL 5

The following sections explain the differences in processing and how
DocuPrint NPS interprets various PCL commands.

DocuPrint NPS does not support Printer Job Language (PJL)
commands embedded within a job. When PJL commands are
embedded within a PCL job, the job prints but the PJL commands are
ignored.

Note: PJL commands specifying the resolution of the job are
ignored. This can cause a PCL job to be printed at an incorrect
resolution. Use the DefaultResolution option or the virtual printer to
specify the correct resolution.

DocuPrint’s behavior with the PCL Copy command (<ESX>&|#X)
differs slightly from the behavior of the HP LaserJet 4si or Color
LaserJet. This section describes these differences.

If a document is printed as simplex, the behavior of the HP LaserJet
4si or Color LaserJet and the DocuPrint NPS is nearly identical,
except that DocuPrint collates the copy output when one copy
command is used to print copies of multiple output pages.

The following is an example for a 9 page document with a “3 copies”
command on page 2, a “2 copies” command on pages 6 and 7, and
a “1 copy” command on page 8:

Table 1-3. PCL Copy command example

DocuPrint NPS collated output - simplex HP LaserJet output - simplex

Sheet 1 PAGE 1, simplex command Sheet 1 PAGE 1, simplex command

Sheet 2 PAGE 2, <ESC>&l3X (3 copies) Sheet 2 PAGE 2, <ESC>&l3X (3 copies)

Sheet 3 PAGE 3, no copy command Sheet 3 PAGE 2, <ESC>&l3X (3 copies)

Sheet 4 PAGE 4, no copy command Sheet 4 PAGE 2, <ESC>&l3X (3 copies)

Sheet 5 PAGE 5, no copy command Sheet 5 PAGE 3, no copy command

Sheet 6 PAGE 2, <ESC>&l3X (3 copies) Sheet 6 PAGE 3, no copy command

Sheet 7 PAGE 3, no copy command Sheet 7 PAGE 3, no copy command

Sheet 8 PAGE 4, no copy command Sheet 8 PAGE 4, no copy command

Sheet 9 PAGE 5, no copy command Sheet 9 PAGE 4, no copy command

Sheet 10 PAGE 2, <ESC>&l3X (3 copies) Sheet 10 PAGE 4, no copy command

Sheet 11 PAGE 3, no copy command Sheet 11 PAGE 5, no copy command

Sheet 12 PAGE 4, no copy command Sheet 12 PAGE 5, no copy command

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES 1-5

PCL 5

Table 1-3. PCL Copy command example (continued)

DocuPrint NPS collated output - simplex HP LaserJet output - simplex

Sheet 13 PAGE 5, no copy command Sheet 13 PAGE 5, no copy command

Sheet 14 PAGE 6, <ESC>&l2X (2 copies) Sheet 14 PAGE 6, <ESC>&l2X (2 copies)

Sheet 15 PAGE 6, <ESC>&l2X (2 copies) Sheet 15 PAGE 6, <ESC>&l2X (2 copies)

Sheet 14 PAGE 7, <ESC>&l2X (2 copies) Sheet 14 PAGE 7, <ESC>&l2X (2 copies)

Sheet 15 PAGE 7, <ESC>&l2X (2 copies) Sheet 15 PAGE 7, <ESC>&l2X (2 copies)

Sheet 16 PAGE 8, <ESC>&l1X (1 copy) Sheet 16 PAGE 8, <ESC>&l1X (1 copy)

Sheet 17 PAGE 9, no copy command Sheet 17 PAGE 9, no copy command

In addition, if the stapling attribute is set for the document on a
DocuPrint equipped with a High-Capacity Stitcher/Stacker, pages 2,
3, 4, and 5 will be stapled together on all copies but pages 6 and 7
will not be stapled together because the copy command is given
explicitly on each of pages 6 and 7. When the PCL Copy command
is used on the DocuPrint, all of the pages cannot be stapled together
automatically.

If the document is printed as duplex (refer to the “PCL Duplex
command” section), the behavior differences between the HP
LaserJet 4si and the DocuPrint are greater. The simplex issue in
which DocuPrint copies are collated and HP LaserJet 4si copies are
uncollated also applies to duplex printing. Additionally, the DocuPrint
will blank the back side of the sheet and pull a new sheet if the copy
command occurs on what is normally the back side of a sheet.
However, the HP LaserJet 4si does not pull a new sheet of paper
when the copy command appears on the back side of a sheet.
Instead, the HP LaserJet 4si will place multiple copies of both the
front and back sides of that sheet into the output, even though
multiple copies are not requested for the front side.

The following is an example of the same job as shown above, printed
as duplex:

Table 1-4. Duplex PCL Copy command example

DocuPrint NPS collated output - duplex HP LaserJet 4si output - duplex

Sheet 1 PAGE 1, duplex command Sheet 1 PAGE 1, duplex command

Sheet 2 PAGE 2, <ESC>&l3X (3 copies) PAGE 2, <ESC>&l3X (3 copies)

PAGE 3, no copy command Sheet 2 PAGE 1, duplex command

Sheet 3 PAGE 4, no copy command PAGE 2, <ESC>&l3X (3 copies)

PAGE 5, no copy command Sheet 3 PAGE 1, duplex command

Sheet 4 PAGE 2, <ESC>&l3X (3 copies) PAGE 2, <ESC>&l3X (3 copies)

PAGE 3, no copy command Sheet 4 PAGE 3, no copy command

Sheet 5 PAGE 4, no copy command PAGE 4, no copy command

PAGE 5, no copy command Sheet 5 PAGE 3, no copy command

Sheet 6 PAGE 2, <ESC>&l3X (3 copies) PAGE 4, no copy command

PAGE 3, no copy command Sheet 6 PAGE 3, no copy command

1-6 XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

Table 1-4. Duplex PCL Copy command example (continued)

DocuPrint NPS collated output - duplex HP LaserJet 4si output - duplex

Sheet 7 PAGE 4, no copy command PAGE 4, no copy command

PAGE 5, no copy command Sheet 7 PAGE 5, no copy command

Sheet 8 PAGE 6, <ESC>&l2X (2 copies) PAGE 6, <ESC>&l2X (2 copies)

Sheet 9 PAGE 6, <ESC>&l2X (2 copies) Sheet 7 PAGE 5, no copy command

Sheet 10 PAGE 7, <ESC>&l2X (2 copies) PAGE 6, <ESC>&l2X (2 copies)

Sheet 11 PAGE 7, <ESC>&l2X (2 copies) Sheet 8 PAGE 7, <ESC>&l2X (2 copies)

Sheet 12 PAGE 8, <ESC>&l1X (1 copy) PAGE 8, <ESC>&l1X (1 copy)

PAGE 9, no copy command Sheet 9 PAGE 9, no copy command

As with simplex, if the stapling attribute is set for the document on a
DocuPrint equipped with a High-Capacity Stitcher/Stacker, pages 2,
3, 4 and 5 are stapled together on all copies, but pages 6 and 7 are
not stapled together because the copy command is given explicitly
on each of pages 6 and 7.

PCL 5

PCL Duplex commands

Next-side command (<ESC>&a0G) no new sheet no new sheet

Front-side command (<ESC>&a1G) forces new sheet forces new sheet

Back-side command (<ESC>&a2G) no new sheet no new sheet

Simplex command (<ESC>&l0S) forces new sheet forces new sheet

The following table summarizes the behavior of a selection of PCL
Duplex commands (<ESC>&|#S and <ESC>&a#G) with respect to
blanking the back-sides of sheets.

Note: These commands force new sheets to be pulled regardless
of the value of the PlexChangesDynamic attribute.

Note: For releases prior to 7.x, the NPS plex attribute must be set
to Duplex in order to use the PCL Duplex commands. If the NPS plex
attribute is set to tumbleDuplex then the job is printed as tumble
duplex regardless of the PCL Duplex command.

Table 1-5. PCL Duplex commands

DocuPrint NPS

(collated) HP LaserJet 4si

Duplex command (<ESC>&l1S) forces new sheet forces new sheet

*Feed from upper tray (<ESC>&l1H) forces new sheet forces new sheet

*Feed from manual feeder (<ESC>&l2H) forces new sheet forces new sheet

*Feed from lower tray (<ESC>&l4H) forces new sheet forces new sheet

Number of copies command (<ESC>&l#X) forces new sheet no new sheet

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES 1-7

PCL 5

PCL Job Separation command

*DocuPrint implements the Paper Source command by
corresponding the number specified in the command to the
correlating media in the media list of the Media document attribute.
Therefore, the "Feed from upper tray" command specifies the first
media in a media list in the document attribute and the "Feed from
lower tray" command specifies the fourth media in a media list in the
document attribute. Refer to the “PCL Paper Source command”
section for more information.

For information on mixed plex jobs for Models 96, 4635, and 180,
see the chapter “Mixed plex applications” in the Guide to Managing
Print Jobs.

PCL uses the Job Separation command (<ESC>&l1T) to separate
distinct portions of the output by offsetting a set of sheets in the
output from a succeeding set of sheets.

There is a short description of the PCL Job Separation command in
the HP documentation. This command is only supported on the HP
LaserJet IIISi. HP recommends that the Job Separation command be
included at the end of each job. There is no mention of possible side
effects when this practice is not followed.

This PCL Job Separation command description is based on the
printing behavior observed on the HP LaserJet IIISi. Job Separation
toggles the output tray offset. It is primarily a printer hardware
function. There were no observed page processing effects.

The PCL Job Separation command has these major features:

• The Job Separation command operates independent of all

other PCL commands. This command is the only PCL
command that changes the output tray offset.

• The Job Separation command toggles the output tray offset.

The output tray offset is switched between two positions. This
command does not set the output tray offset to a specific
position.

• The Job Separation command sends a hardware command to

toggle the output tray offset that is executed immediately.

• The Job Separation command takes effect on the current page

that is being processed. It will be observed when this page is
ejected.

• The output tray offset is retained between print jobs. This offset

consistency cannot be guaranteed since there are ways to
change the output tray offset between print jobs.

When a PCL Job Separation command is encountered on a page,
DocuPrint NPS will offset that page from the previous page. If the job
is printed duplex and the command is encountered on the backside
of the page, DocuPrint NPS will not offset the current page. In this
case, the next page will be offset. There are other conditions that
result in different sets of paper being offset in the output tray.

The DocuPrint NPS currently provides consistent support of the PCL
Job Separation command when it appears at the beginning of the
print job section that should be offset. There are several
recommendations to consider for the use of the PCL Job Separation
command in DocuPrint NPS printing environments:

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PCL 5

• Use DocuPrint NPS facilities for offsetting at the print job level.

Do not rely on the use of the Job Separation command at the
end of every PCL job. Although this is the HP recommendation,
a consistent offsetting of print jobs cannot be guaranteed. For
example, actions such as resetting the HP LaserJet IIISi at the
printer change the output tray offset. The printer does not keep
track of the offset tray position under all conditions.

• The Job Separation command can be used within a print job to

offset sections of the print job. (This feature is sometimes
referred to as creating report offsets within a print job.) The
recommended job structure is to insert PCL commands before
the section that should be offset.

The sequence of PCL commands is a Printer Reset command,
other PCL setup commands, and the Job Separation command.
This PCL setup produces consistent results on the HP LaserJet
IIISi and the Xerox DocuPrint NPS.

• Do not place the Job Separation command at the end of a page

that starts a section with a new output tray offset. There are
significantly different results when printing the same print job on
the HP LaserJet IIISi and the Xerox DocuPrint NPS.

• Use a PCL copy count of 1 (one).

PCL media selection

PCL Paper Source command (tray assignment)

Inconsistent offsetting takes place when multiple copies are
specified. Sheets in the printer output are not stacked with the
desired offset.

There are three ways to specify media for a given page. You can use
the PCL Page Size command (<Esc>&l#A), the PCL Paper Source
command, or you can use the DocuPrint NPS ExceptionPages
attribute.

PCL uses the Paper Source command (<Esc>&l#H) to specify the
tray definition (# is a number from 0-6).

0=don’t change paper source

1=feed paper from printer specific tray

2=feed paper from manual input

3=feed envelope from manual input

4=feed paper from lower tray

5=feed paper from optional paper source

6=feed paper from optional envelope

Note: These are the documented values of HP printers. However,
the DocuPrint NPS changes paper by media definition and not by
tray definition.

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PCL 5

These numbers map directly to the media list set for the Media
document attribute on the virtual printer or in the job submission so
that if:

Media List: A4::blue,A4::white,A4::green,A4::yellow

then:
Esc&l1H selects A4:: blue
Esc&l2H selects A4:: white
Esc&l3H selects A4:: green
Esc&l4H selects A4:: yellow

“Media list” is the list of media assigned to the Media document
attribute.

Note: Refer to the Xerox DocuPrint Network Printer Series Guide
to Managing Print Jobs for information on using virtual printers to

create media lists.

Tray assignments are independent so that if the trays are set as:

Tray 1: A4::white
Tray 2: A4::yellow
Tray 3: A4::blue
Tray 4: A4::green

then:
Esc &|1H selecting A4::blue will use Tray 3
Esc &|2H selecting A4::white will use Tray 1
Esc &|3H selecting A4::green will use Tray 4
Esc &|4H selecting A4::yellow will use Tray 2

When Esc&l0H is used at the start of the job, then media 1 is used,
otherwise it uses the media previously selected.

Note: If an HP LaserJet driver is used that does not support certain
media (for example, manual or envelope feeders), it may be difficult
to specify that media in the media list.

Precedence in selecting media

When more than one method of specifying media is used for the
same page, the order of precedence used by the system to select the
medium is:

1. ExceptionPages attribute

2. PCL Paper Source command

3. PCL Page Size command

If a given page has a media exception (that is, the ExceptionPages
attribute) associated with it, the attribute determines the medium that
the page uses, regardless of whether there is a Paper Source (tray
selection) or Page Size specification.

If a given page does not have a media exception, but has both the
Page Size and Paper Source specified, then the medium specified by
the Paper Source command is checked against the media list. If the
medium is of the appropriate size, it is used. If it is not of the
appropriate size, then the Paper Source command specification is
ignored.

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