Motorola APX 2000 Detailed Service Manual

Glossary Glossary-5
MCU See microcontroller unit.
MDC Motorola Digital Communications.
MDI MCU/DSP Interface internal to the Patriot IC.
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.
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.
NiMH Nickel-metal-hydride.
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.
OSW See outbound signaling word.
OTAR See over-the-air rekeying.
outbound signaling
word
Data transmitted on the control channel from the central controller to the
subscriber unit.
over-molded pad-
array carrier
A Motorola custom IC package, distinguished by the presence of solder
balls on the bottom pads.
over-the-air rekeying Allows the dispatcher to remotely reprogram the encryption keys in the
radio.
PA Power amplifier.
paging One-way communication that alerts the receiver to retrieve a message.
PC Board Printed Circuit Board. Also referred to as a PCB.
PCIC See Power Control IC.
Term Definition

Motorola APX 2000 Specifications

General

IP Rating	IP67
Operating Temperature	-30°C to +60°C
GPS	Optional
Bluetooth	No
Frequency Range	700/800 MHz
Power Output	1-5 W (VHF), 1-3 W (700/800 MHz)
Channels	Up to 1, 000
Battery Life	Up to 10 hours (digital)
Digital Protocol	APCO P25
Frequency	VHF: 136-174 MHz, UHF: 380-470 MHz, 700/800 MHz: 764-870 MHz
Power	1-3W (700/800 MHz), 1-5W (VHF)