4-2

Performance Checks: RF Test Mode

 

 

Supply voltage can be connected from the battery eliminator. The equipment required for alignment procedures is connected as shown in the Radio Performance Checks Setup diagram (Figure 4-1).

Initial equipment control settings should be as indicated in Table 4-1and should be the same for all performance checks and tuner alignment procedures.

Table 4-1. Initial Equipment Control Settings

Service Monitor

Test Set

Power Supply

 

 

 

Monitor Mode: Power Monitor

Spkr set: C

Voltage: 7.5 Vdc

 

 

 

RF Attenuation: -70

Spkr/load:

DC on/standby:

 

Load

Standby

 

 

 

AM, CW, FM: FM

PTT: OFF

Volt Range: 10 V

 

 

 

Oscilloscope Source: Mod

 

Current: 2.5 A

Oscilloscope Horiz: 1 0 mSec/Div

 

 

Oscilloscope Vert: 2.5kHz/Div

 

 

Oscilloscope Trig: Auto

 

 

Monitor Image: Hi

 

 

Monitor BW: Nar

 

 

Monitor Squelch: mid CW

 

 

Monitor Vol: 1/4 CW

 

 

 

 

 

4.3RF Test Mode

When the EP450 radio is operating in its normal environment, the radio's microcomputer controls the RF channel selection, transmitter key-up, and receiver muting, according to the customer code plug configuration. However, when the unit is on the bench for testing, alignment, or repair, it must be removed from its normal environment using a special routine, called RF TEST MODE. This mode allows bench testing of the radio at various test frequencies across the entire band, at both high and low transmit power (if applicable), at various channel spacings, and with different coded or carrier squelch types. Any customer specific programming in the radio will not be changed or affected by use of the RF Test Mode.

Side Button 1

Side Button 2

 

 

P2

P1

 

 

 

 

3

 

2

6

 

 

1

5

9

 

 

 

4

8

#

 

 

 

7

0

 

 

 

*

 

 

Figure 4-2. Side Button Locations

December 3, 2003

HKLN4215A

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Motorola EP450 service manual RF Test Mode, Service Monitor Test Set Power Supply

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.