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System Tour
Printing Directly From a Mainframe Computer with LCDS
Line Conditioned Data Stream (LCDS) is a mainframe to printer, Page Description Language (PDL) which uses referenced (stored on the
system) and datastream-embedded commands to control the processing of print jobs submitted from mainframe computers.
The Xerox LCDS approach to printing dramatically reduces bandwidth requirements by locating the final assembly of document elements
on the printer where resources are stored. This eliminates the need for repeatedly sending complex elements like forms from the host as
part of a fully formed data stream. It reduces the need for sending these high bandwidth items for each job by permanently placing them
on the printer so they do not need to be sent for each job.
The system only needs to send the truly variable data to the printer. Even values that can be derived like the sum of a column of numbers
can be computed on the printer so that data transfer is minimized. This capability is unique in the industry and shows one reason why the
LCDS data stream is selected by customers that need to minimize data bandwidth requirements in complex distributed systems.
LCDS printers offer the ability to control the format of the final product, the printed page, from outside the application generating the
variable data. This separation of function between the data generating application and the printer has always been a common practice in
the high performance range of computer printers. The data may be in its proper position but post processing steps between the application
and the printer produces the final page appearance. The simplest way to visualize this type of printing is to think of preprinted forms where
the printer prints variable information into blank areas of the form.
LCDS resources can be loaded via tape, CD, USB, or over the network. A floppy drive is not avaiable.
NOTE: When using the LCDS application, the Xerox Nuvera System will not retrieve paper from the Insertion Module.
NOTE: Edge marking is not supported.
Enabling LCDS Printing: Overview
To use LCDS printing, the Operator or System Administrator needs to make sure that the following conditions are met:
the Productivity Pack license must be installed and enabled.
the LCDS license must be installed and enabled.
files containing the appropriate processing commands (see the "forms" analogy above) have been loaded on the system
supporting resources (such as forms and fonts) are installed on the system
the correct license is installed on the system
one specific queue has been created and dedicated
The selection and setting of additional queue parameters, available under the various tabs of the Queue Properties... dialog, in
association with the resources installed on the system under LCDS Resources, determines how LCDS jobs are processed at the printer.
For more information about queues, see
Verifying the presence of the LCDS and the Productivity Pack Licenses
To print LCDS jobs, you must verify that the LCDS license is installed and enabled on the system. You must also have the Productivity
Pack license enabled for the stock library to be available as well as all valid halftone screens.
Viewing LCDS Resources
To support LCDS, files containing the appropriate processing commands and supporting resources (such as forms and fonts) must be
installed on the system under LCDS Resources. To view the currently-installed LCDS resources, perform the following steps:
1. Log on to the system by selecting Logon... from the Logon menu.
2. Select Operator (or System Administrator) as the user from the User pull-down menu.
3. Enter the Operator (or System Administrator) password and click <OK>.
4. Select [Administration: LCDS Resources].
5. When the LCDS Resources window opens, if not already selected, select System from the Source pull-down menu.
6. A list of installed LCDS Resources will be displayed. Note the resource types displayed under the Type category. FNT, for
example, represents Font. FRM represents Form. JDL represents Job Descriptor Library (a source file of compiled PDL
commands).
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on the system to process LCDS (streaming) jobs
Working With
Queues.
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