293
NAK
Negative acknowledge. Not acknowledged.
N/A
Not available or not applicable.
NL
New Line (3287 only).
NLQ
Abbreviation for near letter quality font. This is the
highest resolution mode supported on the 6400.
Not Ready Mode
Offline. The printer is not ready to receive and process
commands and data.
nS
Nanosecond
NVFU
Direct Access Vertical Format Unit. See also
DAVFU
.
NVRAM
Abbreviation for non-volatile random access memory.
The storage is permanent, in the sense that information
is not lost when the printer is powered off.
OCR
Abbreviation for Optical Character Recognition. A
process by which a machine can “read” characters
printed in a special standardized font. Data are read by a
photoelectric optical scanner and can be recorded on
magnetic tape or disk. OCR-A and OCR-B are two widely
used OCR fonts.
Ohm
A unit of measurement for electrical resistance.
PA
Program Attention. Used in application programs.
parity (check)
Parity checking is the addition of non-data bits to data,
resulting in the number of bits that are set to a “1” being
either always even or always odd. Parity is used to detect
data errors.
PC
Personal Computer
PCBA
Printed Circuit Board Assembly
pel
The smallest element of a physcial medium that can be
independently assigned color and intensity. Pels per inch
is often used as a measurement of presentation
granularity. Synonymous with picture element, pixel.
PI
Abbreviation for Paper Instruction. A physical hardware I/
O line used in conjunction with the eight data bit lines.
When PI is set high, it indicates that the eight data bits
are interpreted as a paper motion command instead of
printable data.
pica
A name indicating a monospaced font with a pitch of 10
cpi (and usually 12 points in height). Pica is also used in
typography as a unit of measurement equal to 1/6 inch.
pitch
The number of text characters printed per horizontal inch.
Specified in characters per inch or cpi.
pixel
Derived from picture (PIX) ELement. The smallest
displayable picture element on a video monitor or
printable unit. In printing, a pixel is a dot.
Summary of Contents for 6400 Series
Page 2: ......
Page 3: ...6400 Line Matrix Printers S544 5640 01 Setup Guide Cabinet and Pedestal Models...
Page 18: ...xviii Safety Notices...
Page 86: ...86 Chapter 2 Test The Printer...
Page 208: ...208 Chapter 4 RibbonMinder Menu...
Page 224: ...224 Chapter 5 IEEE 1284 Parallel Interface...
Page 262: ...262 Appendix B Printing Speed...
Page 268: ...268 Appendix C Compatibility and Limitations...
Page 286: ...286 Appendix D Physical and Logical Unit Types...
Page 315: ......
Page 316: ...Copyright IBM Corp 1998 2002 174585 001A S544 5640 01 54P0515...