6287 ULTRA Users ManualPage 19-10
Plotter An output unit that graphs data by
automatically controlled pens.
POR Power on reset.
Power on reset The method by which a peripheral
device announces to the host that it is
ready.
Presentation line The number of the line that is the
current presentation position.
Presentation position The line and column number of the
current position on the page.
Presentation surface Represents a single page of printed
output.
Print screen A PC keyboard command that will print
the text currently displayed on the
screen.
Printer An output device that produces hard
copy output.
Program attention key Found on displays and printers, these
keys inform the host of operator
actions.
Programmable function string An instruction string used by the
ULTRA to activate printer features.
Protocol A set of rules governing the format of
data and the control of information
interchange between two
communicating devices.
Protocol converter A device that takes input in one data
communications format and outputs the
data in another communications format.
Pseudo transparency A form of transparency used by the
ULTRA and available in both SCS and
DSC data streams. One-trigger and two-
trigger methods are provided.
PSF Print Services Facility.
PTM Pseudo transparency mode.
