Motorola APX 1000 Detailed Service Manual page 1085

Glossary
Term
MCU
MDC
MDI
MHz
Megahertz
microcontroller unit
MISO
MOSI
multiplexer
MUX
NiMH
OMPAC
open architecture
oscillator
OSW
OTAR
outbound signaling
word
over-molded pad-
array carrier
over-the-air rekeying
PA
paging
PC Board
PCIC
See microcontroller unit.
Motorola Digital Communications.
MCU/DSP Interface internal to the Patriot IC.
See Megahertz.
One million cycles per second. Used especially as a radio-frequency
unit.
Also written as µC. A microprocessor that contains RAM and ROM
components, as well as communications and programming components
and peripherals.
See Master In Slave Out.
See Master Out Slave In.
An electronic device that combines several signals for transmission on
some shared medium (e.g., a telephone wire).
See multiplexer.
Nickel-metal-hydride.
See over-molded pad-array carrier.
A controller configuration that utilizes a microprocessor with extended
ROM, RAM, and EEPROM.
An electronic device that produces alternating electric current and
commonly employs tuned circuits and amplifying components.
See outbound signaling word.
See over-the-air rekeying.
Data transmitted on the control channel from the central controller to the
subscriber unit.
A Motorola custom IC package, distinguished by the presence of solder
balls on the bottom pads.
Allows the dispatcher to remotely reprogram the encryption keys in the
radio.
Power amplifier.
One-way communication that alerts the receiver to retrieve a message.
Printed Circuit Board. Also referred to as a PCB.
See Power Control IC.
Definition
Glossary-5