Motorola APX 5000 Service Manual page 426

Glossary-4
Term
host code
IC
IF
IMBE
inbound signaling
word
integrated circuit
ISW
key-variable loader
kHz
kilohertz
KVL
LCD
LED
light emitting diode
liquid-crystal display
LO
low-speed
handshake
LSH
Master In Slave Out
Master Out Slave In
MCU
MDC
MDI
MHz
Object code executed by the host processor in an ASTRO subscriber
radio. The host is responsible for control-oriented tasks such as
decoding and responding to user inputs.
See integrated circuit.
Intermediate Frequency.
A sub-band, voice-encoding algorithm used in ASTRO digital voice.
Data transmitted on the control channel from a subscriber unit to the
central control unit.
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.
See light emitting diode.
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.
MCU/DSP Interface internal to the microprocessor.
See Megahertz.
Definition
Glossary