Ritron DR-142, Руководство по эксплуатации и обслуживанию, Страница: 2 / 13

1
TABLE OF CONTENTS
SECTION TOPIC PAGE
1. DR-142 SPECIFICATIONS 2
SUB-D 15 PIN CONNECTOR 3
2. INTRODUCTION
GENERAL 4
Model Identification 4
FCC ID 4
Unauthorized Modifications 4
MAINTENANCE INFORMATION 4
Surface Mount Repairs 4
Precautions for handling CMOS 4
Synthesizer shield 5
3. DESCRIPTION OF INPUT/OUTPUT 6
4. PROGRAMMING THE RADIO 7
PROGRAMMING THE RADIO USING A PC COMPUTER 7
Programmable Features 7
COMPUTER SOFTWARE COPYRIGHTS 7
5. DR-142 THEORY OF OPERATION
INTRODUCTION 8
POWER SUPPLY AND VOLTAGE DISTRIBUTION 8
REFERENCE OSCILLATOR 8
SYNTHESIZER 8
RECEIVER 9
Receiver Front End 9
FM Receiver Subsystem 9
Voice and Tone Conditioning 9
MICROCONTROLLER 10
6. DR-142 ALIGNMENT PROCEDURE
RECOMMENDED TEST EQUIPMENT 11
RADIO PREPARATION 11
REFERENCE FREQUENCY 11
RECEIVER FRONT END TUNNING 11
RECEIVER SQUELCH 12