Radio Alignment Procedures: Transmitter Alignment Options

5-3

 

 

5.3.1Initial Test Equipment Control Settings

The initial test equipment control settings are listed in Table 5-1.

Table 5-1. Initial Equipment Control Settings

Service Monitor

Test Set

Power Supply

 

 

 

Monitor Mode: Power Monitor

Speaker set: A

Voltage: 13.2 Vdc

 

 

 

RF Attenuation: -70

Speaker/load:

DC on/standby:

 

Speaker

Standby

 

 

 

AM, CW, FM: FM

PTT: OFF

Volt Range: 20 V

 

 

 

Oscilloscope Source: Mod

 

Current: 20 A

Oscilloscope Horizontal: 10 mSec/Div

 

 

Oscilloscope Vertical: 2.5 kHz/Div

 

 

Oscilloscope Trigger: Auto

 

 

Monitor Image: Hi

 

 

Monitor BW: Nar

 

 

Monitor Squelch: mid CW

 

 

Monitor Volume: 1/4 CW

 

 

 

 

 

5.4Transmitter Alignment Options

Note: When checking the RF power output of the radio with a test set, always use a pad of at least 30 dB attached to the radio end of the RF cable. This will avoid an RF mismatch and ensure a stable RF reading that will not change with varying lengths of connecting cable.

5.4.1Reference Oscillator Warp

This is an important operation which affects all deviation values such as DTMF, MDC-1200 Signaling etc. The frequency will drift if not warped properly. Perform this operation prior to all other transmit tuning operations in order to minimize heating and because of the impact of warp on signaling operations.

Figure 5-3. Reference Oscillator Warp Window

HKLN4215A

December 3, 2003

Page 32
Image 32
Motorola EP450 Transmitter Alignment Options, Initial Test Equipment Control Settings, Reference Oscillator Warp

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.