Glossary of Terms

 

Term

Definition

 

 

 

 

 

 

ALC

Automatic Level Control: a circuit in the transmit RF path that controls RF power

 

 

 

amplifier output, provides leveling over frequency and voltage, and protects

 

 

 

against high VSWR (voltage standing wave ratio).

 

 

 

 

 

 

ASFIC

Audio Signalling Filter Integrated Circuit

 

 

 

 

 

 

BKC

Bad Key Chirp

 

 

 

 

 

 

CD

Compact Disk

 

 

 

 

 

 

CMP

Compression

 

 

 

 

 

 

CPS

Customer Programming Software

 

 

 

 

 

 

CSQ

Carrier Squelch

 

 

 

 

 

 

DTMF

Dual-Tone Multifrequency

 

 

 

 

 

 

DPL

Digital Private-Line™

 

 

 

 

 

 

EEPROM

Electronically Erasable/Programmable Read-Only Memory: used by the radio to

 

 

 

store its personality

 

 

 

 

 

 

Firmware

Software, or a software/hardware combination of computer programs and data,

 

 

 

with a fixed logic configuration stores in a read-only memory. Information cannot

 

 

 

be altered or reprogrammed.

 

 

 

 

 

 

FGU

Frequency Generation Unit

 

 

 

 

 

 

GaAs

Gallium Arsenide: a type of crystalline material used in some semiconductors.

 

 

 

 

 

 

GKC

Good Key Chirp

 

 

 

 

 

 

ISW

Inbound Signalling Word: data transmitted on the control channel from a sub-

 

 

 

scriber unit to the central control unit.

 

 

 

 

 

 

LH DATA

Longhorn Data: a bidirectional 0-5V, RS-232 line protocol that uses the micro-

 

 

 

controller’s integrated RS-232 asynchronous serial communications interface

 

 

 

(SCI) peripheral.

 

 

 

 

 

 

LLE

Low Level Expander: slight amount of volume expansion; used to improve the

 

 

 

signal to noise ratio.

 

 

 

 

 

 

MCU

Micro Controller Unit

 

 

 

 

 

 

MRTI

Motorola Radio-Telephone Interconnect: a system that provides a repeater con-

 

 

 

nection to the Public Switched Telephone Network (PSTN). The MRTI allows the

 

 

 

radio to access the telephone network when the proper access code is received.

 

 

 

 

 

 

OMPAC

Over-Molded Pad-Array Carrier: a Motorola custom package, distinguished by

 

 

 

the presence of solder balls on the bottom pads.

 

 

 

 

 

 

PC Board

Printed Circuit Board

 

 

 

 

 

 

PL

Private-Line® tone squelch: a continuous sub-audible tone that is transmitted

 

 

 

along with the carrier.

 

 

 

 

 

 

 

 

 

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Motorola EP450 service manual Glossary of Terms, Term Definition

EP450 specifications

The Motorola EP450 is a robust and reliable two-way radio that has made a significant impact in the world of professional communications. Known for its solid construction and exceptional performance, the EP450 is a popular choice among various industries, including security, transportation, and event management.

One of the standout features of the Motorola EP450 is its impressive audio quality. Equipped with advanced audio processing technologies, the radio offers clear and crisp sound, ensuring effective communication even in noisy environments. This feature is particularly beneficial for users who work in fields where situational awareness and timely communication are crucial.

The EP450 operates on both VHF and UHF frequency bands, making it versatile for various communication needs. With 16 channels and a wide frequency range, users can easily switch between channels to avoid interference and ensure secure communications. Additionally, the radio offers a programmable feature, allowing users to customize button functions and settings, which enhances the overall user experience.

The battery life of the EP450 is another notable characteristic. It comes powered with a long-lasting rechargeable battery that provides extended usage on a single charge. This ensures that users can rely on the device throughout their shifts without concerns about running out of power. Furthermore, the EP450 features a battery save mode that helps conserve energy when the radio is not in use.

In terms of design, the Motorola EP450 is built to withstand tough environments. Its rugged housing is dustproof and can withstand exposure to water, making it suitable for outdoor use. Additionally, the radio's user-friendly interface includes a large display and oversized buttons, allowing users to operate it easily even with gloves or in challenging conditions.

Furthermore, the EP450 supports various accessories, such as headsets and external microphones, enhancing usability and flexibility in various operational scenarios. This adaptability allows users to customize their communication solutions based on specific needs.

In conclusion, the Motorola EP450 stands out for its superior audio quality, versatile frequency operation, long-lasting battery life, and rugged design. These features make it an indispensable tool for professionals who require reliable communication in demanding environments, proving its value across a multitude of industries.