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DSR.
Data set ready. Associated with modem control.
DTR.
In the IBM Personal Computer, data terminal ready.
Associated with modem controL
dual in-line package (DIP).
A widely used container for an
integrated circuit. DIPs have pins in two parallel rows. The pins
are spaced
1/
10 inch apart. See also DIP switch.
duplex.
(1)
In data communication, pertaining to a simultaneous
two-way independent transmission in both directions.
(2)
Contrast with half-duplex.
duty cycle.
In the operation of a device, the ratio of on time to
idle time. Duty cycle is expressed as a decimal or percentage.
dynamic memory.
RAM using transistors and capacitors as the
memory elements. This memory requires a refresh (recharge)
cycle every few milliseconds. Contrast with static memory.
",.........,
EBCDIC.
Extended binary-coded decimal interchange code.
ECC.
Error checking and correction.
edge connector.
A terminal block with a number of contacts
attached to the edge of a printed-circuit board to facilitate
plugging into a foundation circuit.
EIA.
Electronic Industries Association.
electromagnet.
Any device that exhibits magnetism only while
an electric current flows through it.
enable.
To initiate the operation of a circuit or device.
end of block (EOB).
A code that marks the end of a block of
data.
Glossary-13
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