Motorola SG 2000 Instrucciones de operaciones Pagina 20
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Overview 2-7
SG 2000 Installation and Operation Manual
Refer to the current Motorola catalog for option and feature availability.
Forward Path
The multiple receiver functionality of the platform accommodates split-band and/or redundancy
applications. A typical split-band configuration has analog signals in the 52 MHz through 550 MHz
band feeding one receiver (C location in Figure 2-6). Digital transmissions or narrowcast signals are
carried between 450/550 MHz and 870 MHz on another fiber and processed by the second receiver
(A location). You can use the optional third receiver (B location) as a back up in the event that the
narrowcast receiver loses optical signal input. Automatic path switchover occurs through either the
optional status monitoring or manual control-board modules.
Figure 2-6 provides a diagram of the signal flow-path through the SG 2000:
Figure 2-6
Signal flow diagram
SG2-FJB/P
forward
jumper
board
Data lines
Splitter
Splitter
Splitter
TP
TP
TP
TP
TP
JXP
JXP
JXP
Receiver B
Receiver C
Receiver A
SG2-FBS
forward
band
split
MDR
AttenuatorSG2-FRB
POT
A
DU JXP
+ 18.5
A
mplifier
JXP
EQ
A
mplifier
SG2 lid
SG2 RF chassis
+24 VDC
+5 VDC
ACV
JXP
L
H
Diplex
filter
TP
L
H
Diplex
filter
TP
L
H
Diplex
filter
TP
L
H
Diplex
filter
JXP
Ingress
JXP
JXP
TP
TP
Optical transmitter
Optical transmitter
JXP
JXP
SG2-ABJ/P
forward
A/B
jumper
JXP EQ
A
mplifier
Ingress
JXP
EQ
A
mplifier
Ingress
Status monitor
Switch
TP
-0.5
SG2-RPM/S
SG2-RPLPF
LP filter
LP filter
-3.5
-2.0
-2.0 -1.5
-1.0
-0.5
-2.0
-0.5
-0.5
JXP
EQ
A
mplifier
-1.0
-1.0
+18.5
-8.0
-2.0
@ Min atten
+15 Lo
+21.5 Hi
Power supply
TP
TP
Power supply
Ingress
LP filter
SG2-RPM/C
SG2-RPLPF
-3.5 -3.5
-3.5+8.5
-2.0
Ingress control
JXP
JXP
HP
filter
-1.5
-1.0
All forward and return path test points (TP) are -20dB
5dB
With second transmitter pad = 5dB; without second transmitter pad = 15dB
*
*
**
**
- 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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