LM LMC30051 Manuals

Manuals and User Guides for LM LMC30051. We have 1 LM LMC30051 manual available for free PDF download: Service Manual

LM LMC30051 Service Manual (293 pages)

Repeater Site Base Station 25 Watt and 100 Watt

Brand: LM | Category: Receiver | Size: 32.6 MB

Receiver
3
Transmitter
4
Table of Contents
5
Frequency Standard
6
Introduction
9
Scope of Manual
9
Definitions
9
Reference Documents
9
Related Documents
10
Equipment Description
10
Channel Shelf
10
Frequency Standard
11
Combining System
11
System Control Interface
12
System Control and Monitoring
12
System Options
12
On-Site System Testing
13
Linear Modulation
14
Definition
14
LM Methods
14
Transparent Tone in Band
14
Feed Forward Signal Regeneration
14
Cartesian Loop
15
Transmission Process
15
Cartesian Loop Linearisation of the Transmitter
17
Reception Process
18
Control Channel
21
Call Setup and Clear down
21
Controls, Indicators and Displays
23
System Control Interface
23
The Keypad
24
On-Site Functions
24
Power
26
Pa:led
26
TCC :Leds
26
CW LOCK (Code Word Lock)
27
Talk
27
In Service
27
Squelch
27
Power up Sequence
27
Failure Codes
28
Normal Operation (Control Channel)
28
Normal Operation (Traffic Channel)
28
TCC Internal Controls
29
Channel Number
29
FFSK Output Level
30
TCC Front Panel Controls
30
Squelch Level
30
FFSR Threshold Level
31
Pilot Pumping
31
Frequency Standard
31
Perfonnance Tests
33
Power Supply
33
Location
33
System Control Interface
34
System Control Terminal (Syscon) or Central Computer
34
Channel Setup
35
Repeater Rack
35
Channel Shelves
37
Earth Connection
38
Combining Rack (Optional)
38
Cavity Alignment
38
Receiver Connections
38
Transmitter Connections
39
Antenna Connection
39
Earth Connection
39
Operation
40
Power up
40
Control Channel Selection
40
Squelch Setting
41
During a Call
41
Circ11It Description
42
Receiver
42
Exciter and Power Amplifier
43
Trunking Channel Controller
45
Power Supply Unit
46
Frequency Standard
46
System Control Interface
46
Main Bo8L'D
47
RAM Banks
47
C Bus
48
Commands
48
Responses
48
Commissioning
49
Range
49
Transmission Losses
49
Receiver Losses
49
Reciprocity
50
Simplified On-Site Testing
51
Test Equipment
51
Frequency Reference
51
Receiver Sensitivity Tests
52
Setting up the Equipment
52
Measuring Receiver Sensitivity
52
Receiver Testing Via Splitter/Amplifier
56
Returning Equipment to Operation
56
Transmitter Tests
57
Transmitter Testing, Direct Connection
57
Transmitter Testing, Connection Via Transmitter Combiner
58
Returning Equipment to Operation
59
Carrier Wave Identification (CWID)
59
Comprehensive Od.·site Testid.g
60
Test Equipment
60
Frequency Standard
60
Test Modes
60
Transmit Preamble
61
Transmitter Test Modes
61
Transmitter Power Adjust
61
Receiver Tests
61
Connections
61
Sensitivity Test
62
Transmitter Tests
62
Connections
62
Spectrum Analyzer Set-Up
62
Stability: Pilot Only Test
63
Linearity: Two Tone Test
63
Image Suppression: One Tone Test
64
External Signal Test
65
Adjusting Transdrit Power
65
Chad.nel Freq,Uencies
66
Base Station 5·Channe125/100 W
68
Base Station
69
Module Parts List
69
Looms
69
L033Bel55Xeao
69
Channel 2 EIB so Loom
69
Channel 3 EIB 101 Loom ........................... L033BEL101EAO
69
Channel 4 EIB 123 Loom ........................... L033BEL123EAO
69
Channel 5 EIB 145 Loom
69
F/S73-Channel1 Loom .............................. L033BFS73XEAO
69
F/S76-Channel 1 Loom
70
L033Bfs76Xeao
70
L033Bfs98Xeao
70
F/S102-Channel 2 Loom
72
F/S123-Channel 3 Loom
72
Module Parts List
81
SCI Front Panel Earth
81
SCI Mains
81
SCI Power .... .............................................. L033SCIPWR
81
SCI PSU Earth .......................................... L033SCIPSUEAO
81
SCI Wire
81
PCB Parts List
88
Main
88
Front
91
Rear
92
RAM Bank
93
Main
94
Front
95
Chassis
114
Module Parts List
114
PA-EX Conns Loom ........................... ........ L033LPAEXXEAO
114
RX-TCC Data Loom ......... .......................... L033RXTCCEXAO
114
PSU-TCC Power Loom .............................. L033STC575EA1
114
PSU-RX Power Loom
118
PSU-PA Power Loom
119
PSU-EX POWER Loom
120
PA-EX Feedback Loom
121
EX-TCC Data Loom
122
Module Parts List
124
TX out Loom
124
RF Feedback Loom
124
To 4 Way IDC Loom
124
Power Loom
128
DC Power Loom
129
PA Drive Loom
130
PA Conns Loom
131
Red LED Loom
132
Green LED Loom
133
PCB Parts List
134
Main
167
Filter
167

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