Motorola SG 2000 Instruções de Operação Página 22
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Overview 2-9
SG 2000 Installation and Operation Manual
SG2-LR Receiver
The receiver module (SG2-LR) is designed specifically for high performance in the SG 2000. The
SG2-LR receiver uses an integrated optical-hybrid photo-detector for improved RF performance over
the entire 40 MHz through 870 MHz passband. It is enabled and disabled in response to a signal
from the status monitor transponder or manual control board (MCB). This provides excellent
isolation, improved reliability, and reduced power consumption when the receiver is used in
redundant applications.
Figure 2-7 illustrates a functional block diagram of the SG2-LR receiver:
Figure 2-7
SG2-LR receiver functional diagram
Module
enable
RF
output
Optical
input
Hybrid current
sense signal
(10V/A)
Hybrid current
test point
(1.0 V/A)
Optical power
sense signal
(1 V/mW)
Optical power
test point
(1 V/mW)
Module
enabled
Module
fault
Threshold
comparators
Optical power
monitor
Threshold
comparators
Optical receiver hybrid
Matching
network
Module enable
logic
Hybrid current
monitor
+24V
Low
Normal
High
- STARLINE 1
- Contents 3
- Installation 4
- Operation 4
- Specifications 5
- Figures 5
- Introduction 9
- Figure 1-2 10
- SG 2000 — open 10
- Using this Manual 11
- Related Documentation 11
- Document Conventions 12
- If You Need Help 12
- Calling for Repairs 13
- Overview 14
- Port Locations 15
- Gaskets 16
- Power Supply 17
- Network Monitoring 18
- Configuration 18
- Figure 2-5 19
- Configuration notation 19
- Forward Path 20
- 2-8 Overview 21
- SG2-LR Receiver 22
- Analog Return Path 23
- Figure 2-8 24
- Digital Return Path 25
- DS-SG2-DRT-2X/A 26
- Level Control 27
- Options and Accessories 27
- Model Description Function 28
- Gain Selection 29
- Figure 2-10 30
- Tilt Selection 31
- Figure 2-12 32
- Figure 2-13 33
- Bench Setup 34
- Figure 3-2 35
- SG 2000 RF chassis 35
- Powering the Node 36
- Fuse Function Rating Type 37
- Power Supply Settings 38
- Figure 3-5 39
- SG2-PS2 power supply 39
- Individually Powered Supplies 40
- Manual Gain Control 42
- Thermal Control, Model TCU 42
- Forward Path Padding 44
- Table 3-2 45
- Table 3-3 46
- SG 2000 pad chart-high gain 46
- Figure 3-8 47
- Link Performance 48
- Figure 3-10 49
- Figure 3-11 50
- Figure 3-12 51
- DS-SG2-DRRB board 51
- Figure 3-13 52
- DS-SG2-DRRB board installed 52
- Figure 3-14 53
- Location of JXPs on E-pack 53
- Figure 3-15 54
- 3-22 Bench Setup 55
- SG 2000 Activation Worksheet 56
- 4-2 Installation 59
- Strand Wire Mounting 60
- Figure 4-3 61
- Coaxial Cables 62
- Fiber Cables 62
- Figure 4-5 63
- Figure 4-6 63
- Fiber spool tray 63
- Installation 4-7 64
- Redundant Receiver Mode 66
- Broadband/Narrowcast Mode 66
- AB Override Functionality 67
- A Override 68
- Figure 5-7 69
- Redundant return 69
- Figure 5-8 69
- Split return 69
- Figure 5-9 70
- Figure 5-10 71
- Figure 5-11 72
- DS-SG2-DRT-2X/A split return 72
- Figure 5-12 72
- SG 2000 Optical Modules 73
- SG2-LR Optical Receiver 74
- Feature Description 75
- Figure 5-14 76
- Wavelength Selection Jumper 77
- SG2-IFPT Optical Transmitter 78
- SG2-FPT Optical Transmitter 79
- SG2-DFBT Optical Transmitter 80
- 5-18 Operation 82
- Operation 5-19 83
- Figure 5-21 84
- DS-SG2-DRT/A 84
- Figure 5-22 84
- Figure 5-23 86
- Figure 5-24 86
- Figure 5-25 88
- Figure 5-26 88
- SG2-PS Power Supply 89
- Status Monitoring 90
- Manual Control Board 91
- Description Function 92
- Ingress Control 93
- Parameter Specification 95
- Parameter Specifications 95
- A-6 Specifications 99
- Specifications A-7 100
- A-8 Specifications 101
- Torque Specifications 102
- Abbreviations and Acronyms 103
- Abbreviations and Acronyms-2 104
- 481740-001 105
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