320
Appendix B
BTU British Thermal Unit
BUD Buffered Upper Driver
CA Cathode
CC Card Cage
CCF Card Cage Fan
CE Customer Engineer
CFX The controller board used in H-Series printers. (CFX is the
manufacturer’s designation; the letters are not an acronym or
abbreviation.)
CHNG Change
CIR Circuit
CLK Clock
CO Cover Open
COLL Collector
COMM Communication
CONTLR Controller
CMD Command
CMX The controller board used in ASCII and P5XKA printers (CMX
is the manufacturer’s designation; the letters are not an
acronym or abbreviation.)
CNC Connector, Connection
CPI Characters Per Inch
CR Carriage Return
CT Coaxial/Twinaxial
CTL Control
CTS Clear to Send
CU Control Unit
CUR Current
D0, D1, etc. Data Bit 0, Data Bit 1, etc.
DAT Data
DC Direct Current, Data Controller (a functional unit of
the CMX controller board)
DCD Data Carrier Detect
DIAG Diagnostic
DIFF Differential
DMA Direct Memory Access
DP Data Processing, Dataproducts
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