Galaxy DX 2547 User Manual

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DX 2547
TABLE OF
CONTENTS
PAGE
CHAPTER 1
SPECIFICATIONS
1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 2
OPERATION
2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Control and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.3 Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1 Procedure to Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.2 Procedure to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Alternate Microphones and Installation . . . . . . . . . . . . . . . . . . . . . . . . . 10
CHAPTER 3
CIRCUIT DESCRIPTION
3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CHAPTER 4
ALIGNMENT
4.0 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.1 PLL Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.2 Transmitter Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.3 Receiver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CHAPTER 5
MAINTENANCE
5.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CHAPTER 6
DIAGRAMS AND PART LIST
6.0 PCB Layout and Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CHAPTER 1

Galaxy DX 2547 Specifications

General

Brand	Galaxy
Model	DX 2547
Category	Transceiver
Language	English

Summary

Transceiver Specifications

1.0 General Specifications

Detailed specifications for the transceiver's general operational parameters and features.

1.1 Transmitter Specifications

Specifications for the transmitter, covering power output, modes, and modulation characteristics.

1.2 Receiver Specifications

Specifications for the receiver, including sensitivity, IF frequency, and noise reduction.

Chapter 2 Operation

2.0 Introduction to Operation

An introduction to the operating procedures for the transceiver.

2.1 Control and Connections

Detailed explanation of front and rear panel controls and their connections.

2.2 Microphone Usage

Information on microphone types, connections, and schematics.

2.3 Operating Procedures

Step-by-step procedures for receiving and transmitting with the transceiver.

2.4 Alternate Microphones and Installation

Guidance on using and installing alternative microphones.

Chapter 3 Circuit Description

3.0 Introduction to Circuits

An overview of the technical theory behind the transceiver's circuits.

3.1 PLL Circuit Explanation

Explanation of the Phase Lock Loop circuit's function in frequency generation.

3.2 Receiver Circuit Details

Description of the signal flow within the receiver circuit.

3.3 Transmitter Modulation Circuit

Details on how audio signals modulate the transmitter's RF output.

3.4 Transmitter Amplifier Circuit

Explanation of the transmitter's RF amplification stages.

Chapter 4 Alignment Procedures

4.0 Required Test Equipment

A list of necessary test equipment for performing alignment procedures.

4.1 Alignment Procedures Overview

General instructions for aligning the transceiver's circuits.

4.1.1 PLL Alignment Steps

Specific steps for tuning and aligning the PLL circuit.

4.1.2 Transmitter Alignment Steps

Specific steps for tuning and aligning the transmitter.

4.1.3 Receiver Alignment Steps

Specific steps for tuning and aligning the receiver.

Chapter 5 Maintenance

5.0 Safety Precautions

Important safety measures to prevent damage during operation and maintenance.

5.1 Periodic Inspection Guide

Recommended regular checks to maintain optimal performance.

5.2 Fuse Replacement Procedure

Procedure and important considerations for replacing fuses.

Chapter 6 Diagrams and Part List

6.0 General Introduction

Introduction to the document's diagrams and parts list.

Updates & Corrections Information