91369 Service Manual 8-1
Glossary
The following terms appear in this manual:
ADC
Analog to digital converter
AP
Access Point
ASCII
American Standard Code for
Information Interchange. A
standardized way of assigning
numerical codes to characters
and control codes.
ATE
Automated test equipment used
in performance testing of printed
circuit assemblies.
Baud rate
Data transfer rate associated with
serial data transfers, typically
between personal computers via
modems. Example: 9600 bits per
second.
Bit map
Technique of drawing computer
images by mapping the image in
RAM.
BNC
A push and twist connector that
allows a fast connect/disconnect
of thin coaxial cable.
Boot ROM
Programmed ROM devices that
contain basic data required to
start a digital system at power up.
This data generates instructions
to the processor, allowing a
limited set of start-up instructions.
CFI
Common Flash Interface
Checksum
A count of the number of bits in a
transmission unit, which is
included with the transmission
unit, so that a receiver can check
to see whether the same number
of bits arrived.
CMOS RAM
Battery backed up device used to
store configuration information
such as node name, node ID, or
bed names.
CODEC
An integrated circuit that performs
communications data conversion
Composite video
Video display signal containing
both video and sync information.
Compact Flash card adapter
A memory card that uses flash
memory to store data
CPU
Central Processing Unit
CR/LF
Carriage Return / Line Feed
CTS
Clear To Send signal used in
communication protocols.
DB9
“D” shaped, 9-pin connector of
either male or female gender.
DB15
“D” shaped, 15-pin connector of
either male or female gender.
DB15HD
High-density, “D” shaped, 15-pin
connector with DB9 shell and
footprint.
DB26
“D” shaped, 26-pin connector of
either male or female gender.
DECNET
A proprietary network protocol.
Degauss
Process of removing a magnetic
charge from a material. Color
CRT screens are most
susceptible to this type of charge
creating “purity” problems.
DHCP
Dynamic Host Configuration
Protocol, a networking protocol.
DIN
A standard for cable connectors.
DNS
Domain Name System.
Translates domain names into IP
addresses.
Dot pitch
Method of comparison used to
determine the quality of a display.
It indicates the angle and
proximity each dot has to the
other.
DRAM
Dynamic Random Access
Memory used for computer
memory systems.
DSUB
A type of cable connector.
DTR
Data Terminal Ready signal used
in communications protocol.
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