Motorola EP450 service manual No. Description Function Beeps, No. of BKC

Page 26

Performance Checks: RF Test Mode

4-3

 

 

To enter test mode:

1.Turn the radio on.

Within ten seconds after the self test is complete (self test tone is heard), press SB2 (Side Button 2 in Figure 4-2) five times in succession. If the self test complete tone is not heard, see Error Codes information in Chapter 8. Entry into the test mode is indicated by a positive indicator tone followed by a good key chirp (GKC). Upon entering test mode, the radio is in the carrier squelch mode.

2.Press SB1 (Side Button 1) and scroll through and access test environments as shown in Table 4-2.

3.Press SB2 and scroll through the channel spacing available as shown in Table 4-3.

4.Turn the channel selector knob to change the test channel for that environment as shown in Table 4-4.

5.Press the PTT on a test channel to cause the radio to transmit at the test frequency for the channel. Table 4-2. Test Environments

No. of

Description

Function

Beeps

 

 

 

 

 

1

Carrier Squelch

RX: unsquelch if carrier detected

GKC*

 

TX: mic audio

 

 

 

1

Tone Private-Line

RX: unsquelch if carrier and tone (192.8 Hz) detected

BKC*

 

TX: mic audio + tone (192.8 Hz)

 

 

 

2

Digital Private-Line

RX: unsquelch if carrier and digital code (131) detected

BKC

 

TX: mic audio + digital code (131)

 

 

 

3

Dual-Tone Multiple

RX: unsquelch if carrier detected

BKC

Frequency

TX: selected DTMF tone pair

 

 

 

5

Unsquelch Open

RX: constant unsquelch

BKC

 

TX: mic audio

 

 

 

9

High-Speed Signal-

RX: unsquelch if carrier detected

BKC

ing

TX: 1500 Hz tone

 

 

 

*“BKC” means Bad Key Chirp (low-pitched tone), “GKC” means Good Key Chirp (high-pitched only).

Table 4-3. Test Channel Spacing

No. of BKC

Channel Spacing

125 kHz

212.5 kHz

320 kHz

HKLN4215A

December 3, 2003

Page 25 Page 27
Image 26
Page 25 Page 27
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-STDMajor Assemblies Theory Of OperationIntroduction If IC Test Equipment Test Equipment, Service Aids, and Service ToolsMotorola Part No Description Characteristics Application Service Aids Motorola Part Description ApplicationTest Equipment, Service Aids, and Service Tools Service Aids Programming/Test Cable 5mmGeneral Power-Up Self TestPerformance Checks 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 Reference Oscillator Warp Initial Test Equipment Control SettingsTransmitter Alignment Options 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 followingVCO Attenuation 25 kHz When using test box RLN4460VCO Attenuation 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 FigureUnder the Tx Align, select MDC-1200 Signaling Figure Receiver TuningMDC-1200 Deviation Tuning 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 DevicesDisassembling and Re-assembling the Radio General Radio Disassembly DetailedFront Cover From Chassis Disassembly 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 boardMicrophone and Speaker Re-assembly Radio Re-assembly DetailedDust Cover 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 OrdersTechnical Support Motorola de Colombia Service CenterMotorola de Mexico Service Center 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.
Top Page Image Contents