HP QMS 1660E - Manual (Page 283)

Parallel
Interface
Glossary G-11
Off Line
Not accepting data from the computer. The printer is taken off line by
pressing the Online/Offline key. When the Online indicator is off, the printer
is off line. The printer must be off line to enter the Configuration menu.
On Line
Accepting data from the computer. The printer is on line when the Online/
Offline key is pressed and the Online indicator is on.
Online/Offline Key
The control panel key used to take the printer off line and put it back on line.
Orientation
The direction of print on the page. Printing across the narrow width of a
page is called portrait orientation printing. The word “portrait” comes from
portraits of people, which are usually vertical in format. Printing across the
length of a page is called landscape orientation printing. The term “land-
scape” is derived from pictures of the landscape, which are usually hori-
zontal in format.
Page Description Language (PDL)
A programming language, such as PostScript, that is used to describe
output to a printer or a computer monitor.
Page Memory
A special buffer large enough to hold an entire page of data.
Paper Path
The path the paper follows in its journey through the printer; it begins at the
paper cassette or tray pickup point and ends at the output tray.
Parallel Interface
A data transmission technique that sends each bit simultaneously over
separate lines. (For this reason it is generally faster than a serial interface.)
It is normally used to send 1 byte (8 bits) at a time between computers and
printers. Your printer has a Centronics parallel/IEEE1284 bidirectional
parallel interface port. See also
serial interface.