Xerox Corporation

Wayne Cheng

William M OuYang

Peter M Krist

James R York

Steven W Baldwin

Vernon W Ulrich

Ana M Perez

Ronald E McGarvey

Carolina Creus

The physical integrity of a large-scale hardware connection between two modules, such as in the context of high-speed digital printing, is tested by entering a diagnostic mode in which single-instruction handshake routines are repeatedly sent from one module to another through a parallel bus. Each handshake routine activates all of the communication lines in the bus. If a sending module does not receive the expected response to the single-instruction handshake routine within a predetermined time, the sending module causes an audible signal to be emitted. Service personnel can manually manipulate various cables, connectors, and sockets forming a hardware connection while the system is in diagnostic mode, to isolate the location of a hardware fault.

Method and apparatus for testing a connection between digital processing

A printing system, including a user interface for programming an electronic job ticket with a plurality of instructions to process a first electronic document, is provided. The printing system further includes an emitter for converting the first electronic document, with the electronic job ticket, into a second electronic document written in a page description language, the second electronic document including respective page description language representations of a selected instruction and a selected electronic page. The second electronic document is transmitted from the emitter to a printing machine where the second electronic document is interpreted with a job decomposer to create an output-ready document. In practice, the decomposer performs an image processing operation, on the page description language representation of the selected electronic page, with the page description language representation of the selected instruction of the second electronic document.

Apparatus and method of programming a job to be processed at a location

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Fairport, NY, United States of America

Wayne Cheng