Motorola APX 1000 Detailed Service Manual page 1084

Glossary-4
Term
Global Control
Audio and Power IC
GPIO
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
A mixed-signal (analog and digital) integrated circuit that provides
control, audio, and voltage regulation functionality for the Controller
board.
See General-Purpose Input/Output.
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.
Definition
Glossary