Ritron RIT17-442 Manual Do Utilizador
TABLE OF CONTENTS
SECTION
TOPIC PAGE
1. INTRODUCTION
General
Model
Identification
FCC
REGULATIONS
Licensing
5
Exposure to Radio Frequency Energy
DTX-442
SPECIFICATIONS
GENERAL
RECEIVER
3
TRANSMITTER
3
DESCRIPTION OF INPUT/OUTPUT
OPERATION
MAINTENANCE
INFORMATION
5
Surface Mount Repairs
5
Precautions for handling CMOS
6
Synthesizer
shield
6
6.
PROGRAMMING THE RADIO
9
PROGRAMMING THE RADIO USING A PC COMPUTER
9
Programmable
Features
9
COMPUTER SOFTWARE COPYRIGHTS
9
7.
DTX-442 THEORY OF OPERATION
INTRODUCTION
10
POWER SUPPLY AND VOLTAGE DISTRIBUTION
10
REFERENCE
OSCILLATOR
10
SYNTHESIZER
11
RECEIVER
11
Receiver Front End
11
FM Receiver Subsystem
11
Voice and Tone Conditioning
12
TRANSMITTER
12
Voice and Tone Conditioning in Transmitter
12
MICROCONTROLLER
14
8.
DTX-442 ALIGNMENT PROCEDURE
RECOMMENDED TEST EQUIPMENT
14
RADIO
PREPARATION
14
REFERENCE FREQUENCY AND TRANSMITTER POWER
14
TRANSMITTER VOICE AND DATA DEVIATION
15
RECEIVER FRONT END TUNNING
15
RECEIVER
SQUELCH
15
1 INTRODUCTION
1