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Printing on printers that support multiple resolutions PSF for z/OS: User's Guide S550-0435-04 |
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Printing on printers that support multiple resolutionsWhen you are printing on a printer that can print at more than one resolution (pel density), you might see fidelity imperfections in your printed output. Fidelity problems arise when your data was formatted with resources (for example, fonts) at one resolution, but the printer used resources at a different resolution to print the job. Some fidelity problems that can occur are:
To avoid fidelity problems in such cases, your system programmer can define separate resource libraries for each resolution that the printer supports. For example, your system programmer can define 240-pel font, overlay, and page-segment libraries and 300-pel font, overlay, and page-segment libraries. When PSF is printing on printers that support multiple resolutions (that is, printers printing in automatic mode), PSF can select resources from the appropriate resource library. To select the correct resource library, PSF must know the resolution of the resources that you used when you formatted your data. The format resolution can be specified in several ways:
If the printer is in automatic mode and, therefore, is capable of accepting resources at multiple resolutions, PSF looks for the first specification of the format resolution in these areas and order:
If the printer is not in automatic mode and, therefore, is accepting resources at a single resolution only, PSF uses the resolution reported by the printer to select the resource libraries. PSF uses the determined format resolution only when selecting a system library to search for resources. If inline resources exist or if you specify a user library, PSF searches them first. Whether you specify the format resolution to PSF or not, you can control what action PSF takes if PSF finds a mismatch between the resolution of the fonts used to format the data and the resolution of the fonts used to print the data. A font–resolution mismatch might occur if, for example, the printer is not printing in automatic mode or the system programmer did not set up separate resource libraries for each resolution. In the event of a font–resolution mismatch, the default action is that PSF continues processing the data set. Example:
In this example, a print
data set that was formatted and an overlay that was created by using
240-pel fonts are to be printed on an InfoPrint 4000 printer, which
can print in automatic mode. Automatic mode means that the printer
can accept resources at multiple resolutions. Assume that your system
programmer defined a 240-pel font library and a 240-pel overlay library.
Because font fidelity is important to this application, you want PSF
to stop processing the page if PSF finds a font-resolution mismatch.
This example specifies these resources and parameters:
For a complete description of how to handle printing on printers that support multiple resolutions, including a description of the system programmer tasks involved, see PSF for z/OS: Customization. |
Copyright IBM Corporation 1990, 2014
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