Motorola SSETM 5000 - Manual (Page 213)

6881094C12-A November 11, 2004
Glossary-5
liquid-crystal display An LCD uses two sheets of polarizing material with a liquid-crystal
solution between them. An electric current passed through the liquid
causes the crystals to align so that light cannot pass through them.
LO See local oscillator.
local oscillator A device used to generate a signal that is combined with another signal
in order to mix the second signal to a different frequency.
low-speed
handshake 150-baud digital data sent to the radio during trunked operation while
receiving audio.
LSH See low-speed handshake.
Master In Slave Out SPI data line from a peripheral to the MCU.
Master Out Slave In SPI data line from the MCU to a peripheral.
MCU See microcontroller unit.
MDC Motorola Digital Communications.
MHz See Megahertz.
Megahertz One million cycles per second. Used especially as a radio-frequency
unit.
microcontroller unit Also written as µC. A microprocessor that contains RAM and ROM
components, as well as communications and programming components
and peripherals.
MISO See Master In Slave Out.
MOSFET Metal-Oxide-Silicon Field Effect Transistor
MOSI See Master Out Slave In.
multiplexer An electronic device that combines several signals for transmission on
some shared medium (e.g., a telephone wire).
MUX See multiplexer.
NiCd Nickel-cadmium.
NiMH Nickel-metal-hydride.
ohm A unit of electrical resistance.
OMPAC See over-molded pad-array carrier.
open architecture A controller configuration that utilizes a microprocessor with extended
ROM, RAM, and EEPROM.
oscillator An electronic device that produces alternating electric current and
commonly employs tuned circuits and amplifying components.
Term Definition