Motorola EP450 service manual Glossary of Terms, Term Definition

Page 90

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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Contents EP450 HKLN4215A Computer Software Copyrights Product Safety and RF Exposure ComplianceForeword Document CopyrightsTable of Contents Display Model Disassembly and Re-assembly Appendix a Accessories Troubleshooting TablesList of Figures 13. Microphone and Speaker Wires Re-assembly List of Tables Related PublicationsModel Charts and Test Specifications Radio Model InformationModel Chart for VHF 146-174 MHz EP450, VHF, 146-174 MHz Model DescriptionTransmitter VHF Test SpecificationsGeneral ReceiverModel Chart for UHF 403-440 MHz EP450, UHF, 403-440 MHz Model Chart for UHF 438-470 MHz EP450, UHF, 438-470 MHz Model Chart for UHF 465-495 MHz EP450, UHF, 465-495 MHz UHF Test Specifications LAH65SDH9AA4NMIL Standards MIL-STDTheory Of Operation IntroductionMajor Assemblies If IC Test Equipment, Service Aids, and Service Tools Motorola Part No Description Characteristics ApplicationTest Equipment Service Aids Motorola Part Description ApplicationTest Equipment, Service Aids, and Service Tools Service Aids Programming/Test Cable 5mmPower-Up Self Test Performance ChecksGeneral RF Test Mode Service Monitor Test Set Power SupplyNo. Description Function Beeps No. of BKCVHF R2 UHF R1 UHF R2 UHF R3 Test Mode Test Name Communications Analyzer Radio Test Set CommentsPerformance Checks RF Test Mode Radio Alignment Procedures CPS Programming SetupRadio Tuning Setup Initial Test Equipment Control Settings Transmitter Alignment OptionsReference Oscillator Warp Modulation Balance Attenuation Under Tx Align menu, select Reference Oscillator Warp FigureTransmit Power Tuning Transmit Power Window High PowerTo Perform Transmit High Power Tuning, do the following To Perform Transmit Low Power Tuning, do the followingWhen using test box RLN4460 VCO AttenuationVCO Attenuation 25 kHz Under the Tx Align menu, select VCO Attenuation 12.5 kHz VCO Attenuation 12.5 kHzVCO Attenuation 20 kHz Under the Tx Align menu, select VCO Attenuation 20 kHzDtmf Deviation Tuning Under Tx Align, select Dtmf Deviation FigureReceiver Tuning MDC-1200 Deviation TuningUnder the Tx Align, select MDC-1200 Signaling Figure Rated Volume Tuning Perform the rated volume tuning procedure as followsSquelch Tuning Manual Squelch TuningRssi System Level Tuning Auto TuneUtilities Rssi Display TuningUnder the Rx Align menu, select Rssi Display Tuning Radio-to-Radio CloningProcedure 12. Side Button LocationsRadio Alignment Procedures Radio-to-Radio Cloning Cleaning Procedures Display Model Disassembly and Re-assemblyPreventive Maintenance Cleaning External Plastic SurfacesCleaning Internal Circuit Boards and Components Safe Handling of Cmos and Ldmos DevicesRadio Disassembly Detailed Front Cover From Chassis DisassemblyDisassembling and Re-assembling the Radio General Antenna and Knob Removal Keyboard Flex Connection Dust Cover Disassembly Speaker and Microphone DisassemblyPTT Disassembly Keyboard RemovalChassis Disassembly Audio jack shroud can be removed from the main boardRadio Re-assembly Detailed Dust Cover Re-assemblyMicrophone and Speaker Re-assembly 12. Microphone Re-assembly Keypad and LCD/Keyboard Re-assembly 14. Keypad Re-assemblyKeyboard Retainer Re-assembly Chassis Assembly/Re-assemblyChassis and Front Cover Re-assembly 17. Main Board onto Chassis Re-assembly18. Microphone and Speaker Wires Re-assembly PTT Re-assembly 20. Fastening the ChassisMechanical View and Parts List 1 EP450 Display Exploded View and Parts ListMotorola Part Description Number MotorolaDecember 3 Non-Display Model Disassembly and Re-assembly Safe Handling of Cmos and Ldmos Devices Disassembling and Re-assembling the Radio General Antenna and Knob Removal Speaker Connector Shroud Microphone Speaker and Microphone Disassembly Chassis Disassembly Removal of Main Board from ChassisDust Cap Re-assembly 11. Speaker Re-assembly 12. Installation of Main Board onto Chassis 13. Microphone and Speaker Wires Re-assembly 15. PTT Re-assembly 1 EP450 Non-Display Exploded View and Parts List 16. EP450 Non-Display Radio Exploded View14Mechanical View and Parts List Operational Error Codes Troubleshooting TablesPower-Up Error Codes Error Code Possible Causes Corrective ActionTroubleshooting Table for Receiver Troubleshooting Table for Transmitter Troubleshooting Tables Troubleshooting Table for Transmitter Antennas Appendix a AccessoriesCarrying Accessories ChargersAudio Accessories HeadsetsRemote Speaker Microphones ManualsAccessories Replacement Parts Ordering Appendix B Warranty, Service Support, and Replacement PartsWarranty Scope of ManualTelephone Orders Motorola OnlineMail Orders Fax OrdersMotorola de Colombia Service Center Motorola de Mexico Service CenterTechnical Support Appendix B-4 Glossary of Terms Term DefinitionReset

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.