Motorola PM1200, Basic Service Manual

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October 26, 2007 6880309U09-A
Glossary-2
Data communication
equipment Definition for device (such as radio) data communications using the
RS232 protocol. The correct data communication wiring requires the
device’s TX pins (output) to connect to the RX pins (input) and the RTS
pins (output) to connect to the CTS pins (input). It is incorrect to attach
device pins having the same name to each other.
Data terminal
equipment Data terminal equipment; for example, a computer.
DCE See Data communication equipment.
default A pre-defined set of parameters.
digital Refers to data that is stored or transmitted as a sequence of discrete
symbols from a finite set; most commonly this means binary data
represented using electronic or electromagnetic signals.
See also
analog.
digital-to-analog
conversion Conversion of a digital signal to a voltage that is proportional to the input
value.
See also A/D.
digital-to-analog
converter A device that converts digital data into analog signals. See also ADC.
Digital Private-Line A type of digital communications that utilizes privacy call, as well as
memory channel and busy channel lock out to enhance communication
efficiency.
digital signal
processor A microcontroller specifically designed for performing the mathematics
involved in manipulating analog information, such as sound, that has
been converted into a digital form. DSP also implies the use of a data
compression technique.
digital signal
processor code Object code executed by the Digital Signal Processor in a subscriber
radio. The DSP is responsible for computation-intensive tasks, such as
decoding signaling.
DPL See Digital Private-Line. See also PL.
DSP See digital signal processor.
DSP code See digital signal processor code.
DTMF See dual tone multi-frequency.
dual tone multi-
frequency The system used by touch-tone telephones. DTMF assigns a specific
frequency, or tone, to each key so that it can easily be identified by a
microprocessor.
EEPROM See Electrically Erasable Programmable Read-Only Memory.
Term Definition