HP 5961-0509 manual Resolution, Robust-Xon, Row, Rule, Scalable

Resolution

The high quality output achieved by HP LaserJet printers is due in part to the ability to lay down a fine grid of “dots” on the page. The density of this grid is referred to as the printer’s resolution.

Resolution is expressed as a value of dots-per-inch. Until recently, all HP LaserJet family printers printed at a resolution of 300 dots-per-inch. In a one inch square, the printer could print a dot anywhere in a grid of up to 300 dots horizontally by 300 dots vertically, for a total of 90,000 possible dot locations per square inch (300 × 300 = 90,000).

The LaserJet 4 printer is capable of printing at either 300 or 600 dpi resolution. At 600 dots-per-inch, it becomes possible to print up to 360,000 dots per square inch (600 × 600 = 360,000).

Robust-Xon

The configuration of ROBUST-XON determines the method by which Xon signals are generated on the interface. If ROBUST-XON is ON, an Xon is transmitted from the printer to the host computer when the printer’s 1 Kbyte I/O buffer has less than 128 data bytes remaining (896 bytes empty). The printer must be in the on-line state and not busy. If no data is received, additional Xon’s are transmitted at one second intervals.

If ROBUST-XON is OFF, the printer sends one Xon signal when the printer is in the on-line state, and is not busy. The printer does not send additional Xon signals.

Row

The distance between rows is defined by the current vertical motion index (VMI).

Rule

A solid-filled rectangular area.

Scalable

PCL 5 printers can use either bitmap or scalable fonts. A bitmap font is available in its one, defined size only. Scalable fonts, on the other hand, provide an “outline” for each character which can be scaled by the PCL 5 printers to produce a large range of character sizes.

Glossary-12 EN