Daniels Electronics VR-3H045-SWA Manuals

Manuals and User Guides for Daniels Electronics VR-3H045-SWA. We have 1 Daniels Electronics VR-3H045-SWA manual available for free PDF download: Instruction Manual

Daniels Electronics VR-3H045-SWA Instruction Manual (108 pages)

MT-3 RADIO SYSTEMS

Brand: Daniels Electronics | Category: Radio | Size: 3 MB

Table of Contents
3
General
7
Introduction
7
VR-3H040 Extra Wideband Receiver Family Models
7
Manual Organization
8
Performance Specifications
9
General
9
Enhanced Front End Performance Specifications
11
Enhanced Synthesizer Performance Specifications
11
Physical Specifications
12
System Overview
13
Receiver Operation
13
Frequency Selection
14
Receiver Assembly and Adjustment
15
Complete Receiver Alignment
15
Frequency Change
16
Minor Frequency Change
17
Major Frequency Change
17
Mhz If/Audio Main Board
18
Enhanced Front End
18
Image Rejection Filter
18
Enhanced Synthesizer
19
Receiver Front Panel Illustration
20
Receiver Case - Exploded View
21
VR-3H040 Family Enhanced Receiver Block Diagram
22
Theory of Operation
23
Mhz if / Audio Main Board
23
General
23
Power Supplies
23
IF Buffer Board
23
First if Amplifier
24
Second if / Demodulation
24
Received Signal Strength Indicator (RSSI)
24
Audio Processing
25
Post Discriminator Filtering
26
Squelch Circuitry
27
COR Outputs
28
Channel Selection
29
Enhanced Front End
30
General
30
Power and Interconnection
30
Preselector Filter
30
Local Oscillator Filter
31
Double Balanced Mixer
31
Internal Power and Control (Digital Board)
32
Common Analog Board Circuitry
32
71.4 Mhz Analog Board Circuitry
34
Synthesizer Digital Circuitry (Digital Board)
35
Frequency Control
35
BCD Switch Frequency Control
35
Synthesizer Base and Frequency Increment Table
36
6.25 Khz Channelization
36
Receiver Alignment
37
General
37
Repair Note
37
Printed Circuit Board Numbering Convention
38
Recommended Test Equipment
38
Synthesizer OS-3, OS-3H)
39
VHF os(R/T)-3H 29 - 71.4 Mhz VCO Alignment
39
Front End Tuning
41
Main Board Tuning
42
IF Amplifier Bias Current Adjustment
42
Mhz
42
Audio Levels
42
Distortion and Sensitivity
43
Second if / Demodulation
43
Squelch Window
44
Receiver Configuration and Test Points
45
Mhz if / Audio Main Board Factory Settings
45
The 21.4 Mhz If/Audio Main Board Configuration
45
The 21.4 Mhz If/Audio Main Board Configuration Jumper Settings
45
Test Points
46
Power Supplies
47
Mhz if / Audio Board Interconnect Pin Definitions
48
Enhanced Front End Test Points
48
OS(R/T)-3(A/H) Synthesizer Factory Configuration
49
Jumper Configuration
49
Synthesizer Test Points
50
Mhz FM if Buffer Component Layout
55
Mhz FM if Buffer Schematic Diagram
55
Enhanced Front End Block Diagram
56
Bandpass Filter Component Layout
56
Bandpass Filter Schematic Diagram
56
Enhanced Front End Schematic Diagram - Extra Wideband
57
Enhanced Front End Component Layout - Extra Wideband
59
Parts Lists
67
Electrical Parts Lists
67
Mhz If/Audio Main Board
67
IF Buffer Board
74
Enhanced Front End
74
FE Bandpass Filter
76
Enhanced Synthesizer Analog Board
77
Enhanced Synthesizer Digital Board
80
Mechanical Parts
82
Mhz If/Audio Main Board
82
Enhanced Front End
83
Enhanced Synthesizer
83
Channel Designation Tables
85
Channel Designation Table: 29-50 Mhz, 5Khz Increments
85
Channel Designation Table: 29-50 Mhz, 6.25Khz Increments
97
Revision History
107

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Daniels Electronics VR-3H045-SWA Instruction Manual (108 pages)

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