Motorola SG 2000 Betriebsanleitung PDF herunterladen (Seite 31)

2-18 Overview

SG 2000 Installation and Operation Manual

Tilt Selection

To use the tilt selection charts, first determine the system operating bandwidth, either 750 MHz or

870 MHz. Next, determine the desired system channel load either 77, 94, or 110 channels. Use the

corresponding bandwidth and channel loading chart to determine the preferred tilt, either low,

standard, or high.

Figure 2-11 illustrates the tilt selection chart for 750 MHz bandwidth and 77-channel load:

Figure 2-11

Relative level dB versus 750 MHz slope 77 channels

-3

150 250 350 450 550 650 750

-1

-2

Frequency, MHz

elative level, d

SG2 750 MHz Slope Chart

77 Analog Channels, 200 MHz Digital

Low

Standard

High

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 104 105

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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