Symbol Technologies MicroBase MRC-921 - Manual (Page 32)

Glossary
asynchronous
transmission A transmission with variable time intervals between
successive data characters. In asynchronous
communication, each data character is framed by
start and stop bits.
battery pack A sealed set of rechargeable nickel-cadmium batteries
used in the PTC-921 and recharged by the MRC-921.
bit The fundamental binary unit, either a 1 (on) or a 0
(off). In ASCII code, seven bits represent one
character of data.
bps Bits per second. A rate of electronic data transmission.
data
communication The transport of encoded information from one device
to another.
host computer A personal computer or mainframe that receives and
processes data from remote PTCs.
LED Light-emitting diode. The indicator lights on the
MRC-921 are of this type.
nickel-cadmium
battery A type of rechargeable battery used in PTC-921
battery packs.
one-way
communication The transport of information from one device
to another without interruption. In one-way
communication, the receiving device cannot respond
directly to the sending device.
RF Radio frequency.
RS-232 An Electronic Industries Association (EIA) standard
that defines the connector, connector pins, and signals
used to transfer data serially from one device to
another.
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