Ranger Communications RCI-2950 DX User Manual

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RCI-2950 DX
RCI-2970 DX
TABLE OF
CONTENTS
CHAPTER 1
PAGE
SPECIFICATIONS
1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 2
INTRODUCTION
2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 3
OPERATION
3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 4
PROGRAMMING
4.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2
Frequency Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
4.3 Offset Frequency Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CHAPTER 5
CIRCUIT DESCRIPTION
5.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 6
ALIGNMENT
6.0 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CHAPTER 7
MAINTENANCE
7.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CHAPTER 8
DIAGRAMS AND PART LIST
8.0 PCB Layout & Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Ranger Communications RCI-2950 DX Specifications

General

Frequency Range	28.000 - 29.700 MHz
Input Voltage	13.8 V DC
Antenna Impedance	50 Ohms
Power Supply	13.8V DC
Mode	AM/FM/SSB
Receiver Sensitivity	0.5 µV
Channels	40

Summary

Chapter 1 Specifications

1.0 General

Details general specifications like model, frequency range, tuning steps, emission modes, and input voltage.

1.1 Transmitter

Lists transmitter specifications including RF power output, transmit modes, modulation, and antenna impedance.

1.2 Receiver

Covers receiver specifications such as sensitivity, image rejection, AGC, and audio output power.

Chapter 2 Introduction

2.0 Introduction

Provides a general overview of the RCI-2950 DX / RCI-2970 DX dual band mobile transceiver.

2.1 Features

Lists key features of the RCI-2950 DX / RCI-2970 DX transceiver, such as power output and mode operation.

Chapter 3 Operation

3.0 Introduction

Explains basic operating procedures for the RCI-2950 DX / RCI-2970 DX transceiver.

3.1 Controls and Connections

Details front panel controls (Frequency Selector, RF Power, Mic Gain, Volume, Squelch, RF Gain, Clarifier, Mode) and rear panel connections (Antenna, CW Key, Ext. SP, PA SP, Power).

3.2 Microphone and PTT

Describes the microphone's PTT switch and remote up/down controls for frequency adjustment.

3.3 Operating Procedures

Covers channel selection, mode selection, RF power control, receive scanning, split function, memory functions, and basic receive/transmit procedures.

Chapter 4 Programming

4.0 Introduction

Explains basic programming procedures for the RCI-2950 DX / RCI-2970 DX transceiver.

4.1 Frequency Selection

Details three methods for selecting operating frequencies using front panel controls, microphone buttons, or the frequency select knob.

4.2 Frequency Scanning

Covers methods for frequency scanning, including scanning all frequencies between set limits and scanning programmed memory channels.

4.3 Offset Frequency Operation

Explains how to use the split frequency feature for FM repeater operation, allowing offset transmit frequencies.

Chapter 5 Circuit Description

5.0 Introduction

Explains the technical theory of operation for the RCI-2950 DX / RCI-2970 DX mobile transceiver.

5.1 PLL Circuit

Describes the Phase Lock Loop circuit's role in generating local oscillator and exciter signals for receive and transmit operations.

5.2 Receiver Circuit

Details the receiver's signal path from antenna to audio output, including pre-amp, mixer, filter, and detection stages.

5.3 Transmitter Modulation Circuit

Explains how audio signals modulate RF signals in AM, FM, and SSB modes, including amplification stages.

5.4 Transmitter Amplifier Circuit

Describes the process of amplifying the exciter signal through various amplifier stages before transmission.

Chapter 6 Alignment

6.0 Required Test Equipment

Lists essential test equipment required for transceiver alignment and setup.

6.1 Alignment Procedures

Details PLL, Transmitter (TX Power, APC, BIAS Current, RF Power, ALC, CW TX, AM/FM Modulation), and Receiver alignment steps.

Chapter 7 Maintenance

7.0 Precautions

Lists precautions to prevent damage to the transceiver during use and alignment.

7.1 Periodic Inspection

Outlines key items for regular inspection to ensure continued performance, such as antenna and cable checks.

7.2 Fuse Replacement

Provides guidance on fuse replacement, including the correct rating and the importance of finding the cause of a blown fuse.

Chapter 8 Diagrams and Parts List

8.0 General

States that electrical and mechanical parts information is included in the parts list, with reference designators in alphanumeric order.

8.1 Ordering Replacement Parts

Provides contact information for ordering replacement parts from the manufacturer's parts department.