Motorola APX 1000 Basic Service Manual page 513

Glossary
Term
integrated circuit
ISW
key-variable loader
kHz
kilohertz
KVL
LCD
LDMOS
LED
light emitting diode
liquid-crystal display
LO
low-speed
handshake
LSH
Master In Slave Out
Master Out Slave In
MCU
MDC
menu entry
MHz
Megahertz
microcontroller unit
MISO
An assembly of interconnected components on a small semiconductor
chip, usually made of silicon. One chip can contain millions of
microscopic components and perform many functions.
See inbound signaling word.
A device used to load encryption keys into a radio.
See kilohertz.
One thousand cycles per second. Used especially as a radio-frequency
unit.
See key-variable loader.
See liquid-crystal display.
Laterally Diffused Metal Oxide Semiconductor.
See LED.
An electronic device that lights up when electricity is passed through it.
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.
Local oscillator.
150-baud digital data sent to the radio during trunked operation while
receiving audio.
See low-speed handshake.
SPI data line from a peripheral to the MCU.
SPI data line from the MCU to a peripheral.
See microcontroller unit.
Motorola Digital Communications.
A software-activated feature shown at the bottom of the display.
Selection of a feature is controlled by the programming of the buttons on
the side of the radio.
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.
Definition
Glossary-5