Motorola LST-5B UHF Portable Radio Manuals

Manuals and User Guides for Motorola LST-5B UHF Portable Radio. We have 1 Motorola LST-5B UHF Portable Radio manual available for free PDF download: Operation And Maintenance Manual

Motorola LST-5B Operation And Maintenance Manual (229 pages)

Lightweight satellite transceiver

Brand: Motorola | Category: Radio | Size: 22.2 MB

Table of Contents
6
Introduction
16
General Information
16
Abbreviations and Glossary
17
Equipment Description
19
Features
19
System Components
20
Transceiver
21
Antenna
21
Battery Case
21
Cable Assembly
21
Optional Antennas
22
Minimum Equipment Requirement
22
Reference Data
23
Operation
27
Controls, Indicators and Connectors
27
Front Panel Controls, Indicators and Connectors
28
Display Modes
30
Frequency Select
30
Frequency/Presets
30
Operational Procedures
32
Equipment Set-Up
32
Turning on the Unit
33
Entering Preset Data
33
Storing Preset Frequencies
33
Selecting Operating Modes
35
Selecting Transmit and Receive Channels
36
Setting Selective Call Codes
37
Setting SELCAL Codes
37
Selecting Meter Display
38
Selecting Baud Rate and Turning Modem on
38
Adjusting Transmit Power
39
Operating Procedures
41
Siting
41
Encrypted LOS Operation
41
Satellite Operation
42
Encrypted LOS Operation - Block Diagram
42
Remote Control Operation
43
Retransmit Operation
44
PT or CT LOS Relay Operation
44
PT Retransmit Operation
45
CT Retransmit Operation
45
CT Satellite Relay Operation
46
Scan Operation
46
Selecting Scan Channel
47
Beacon Operation
48
SELCAL Operation
48
Cancellation of Presets
49
Front Panel Illumination
49
Installation
50
Assembly and Preparation for Use
50
Unpacking the Radio Set
50
Checking Unpacked Equipment
50
Attaching the Handset
51
Attaching the Antennas
51
Compatible Communications Security Devices
52
Remote Operation
55
RCU Control
55
Computer Control
56
X Mode Connector
56
Data Rates and Logic Levels
56
Data Exchange Protocol
57
Typical Data Transfer
57
Timing Restrictions
58
Commands
58
Modem Operation
63
Interface Characteristics
64
System Maintenance
67
Common Operator Errors
67
Manual System Test
68
Test Equipment Required
68
Receiver Tests
69
Alternate Test Equipment
69
FM CT Sensitivity and Distortion
73
AM PT Sensitivity and Distortion
73
AM CT Sensitivity and Distortion
73
CT Audio Response
73
Squelch Sensitivity
75
Scan Function
76
Signal Strength Meter
77
Transmitter Tests
77
Transmitter Tests Setup
78
Transmit Frequency
79
Output Power
80
PT Modulation
80
CT Modulation
81
Modulation Distortion
82
Modem Tests
83
Beacon
83
Test Procedure
85
Automatic System Test
85
Troubleshooting Chart
86
Transmit and Receive Troubleshooting Chart
87
Transmit Troubleshooting Chart
88
Receive Troubleshooting Chart
90
Alignment Procedure
91
Frequency Alignment
92
Transmit Power Output Alignment
92
PT Modulation Adjustment
92
CT Modulation Adjustment
92
Required Tools
94
List of Replaceable Assemblies
94
Individual Assemblies
95
Display Assembly
95
Processor Assembly
95
Audio Assembly
95
Receiver Assembly
96
Synthesizer Assembly
96
ALC RF Driver Assembly
96
Motherboard Assembly
96
Modem Assembly
97
Fuse Replacement
97
Memory Battery Replacement
97
Transceiver Functional Description
100
Physical Description
102
Simplified Block Diagram
103
Functional Block Diagram
104
Receiver Block Diagram
104
Receiver Input Signals
105
Receiver Input/Output Diagram
105
Receiver Output Signals
106
Transmitter - Functional Block Diagram
106
Chassis Assembly
108
Transceiver Assembly
111
Detailed Description
114
Serial Input LCD Driver
114
Microprocessor Input/Output Lines
132
Other Input Lines
132
Other Output Lines
132
Logic Functions
133
Audio Assembly Logic Functions
134
Power Supply - DC
138
Receiver RF Board
142
Receiver if Board
142
Receive Mode
142
Automatic Gain Control
142
Squelch and Signal-Strength Indication
143
Fm/Am and R/T Selection
143
Maintenance and Troubleshooting
143
Output Signals
155
Input Signals
155
Voltage-Controlled Oscillator
155
Frequency Synthesis Scheme
155
TCXO Frequency Reference
158
Phase-Locked Loop
158
Programmable Dividers
158
Programmable Loop Filter
159
Modem on Mode
159
Modem off Mode
159
DC Filter
159
Voltage Limiting Circuit
160
Voltage Controlled Oscillator
160
Loop Filter
160
FM/AM Select
160
Board Interconnections
171
ALC Audio L Assembly
171
Beacon Generator
171
AGC Circuit
171
Filter/Sensor
172
Analog to Digital Converter
172
Power Select Circuit
172
ALC VCA Assembly
173
Voltage Controlled Amplifier
173
R/T Enable
175
Power Level Control
175
ALC Loop
177
Power Reference Adjustment
177
FM/AM Modulation Circuits
178
Audio Modulation Circuits - Schematic Diagram
179
ALC Audio L Board
180
UHF RF-Amplifier Assembly
188
Stage 1
189
Temperature Compensation
190
Thermal Switch
190
Select Components
190
Modem Interface
196
Demodulator/Bit Sync - Receive Mode
196
Modem Interface Block Diagram
197
Modulator - Transmit Mode
200
Operational Options
200
Shaped BPSK Modulation
202
Modem Options - Switch Settings
204
Lithium Battery Pre Conditioning
219
Installing or Replacing the Battery
220
Index
225

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