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4-8 Modules
SG4000 Installation and Operation Manual
Table 4-3 provides information on the user-related features of the analog SG4-* transmitter.
Table 4-3
SG4-* transmitter features
Feature Description
Input JXP attenuator
JXP style attenuator pad that enables you to make return path gain
adjustments to set the proper into the laser. This pad value is factory set to
6 dB in anticipation of 28 dBmV total power at the node housing input.
Select the proper pad value required to measure −5 dBmV total power at
the RF input test point.
RF input test point
−28 dB test point that enables you to measure the total power in the return
band in order to select the appropriate JXP. The nominal power level at
this test point is –5 dBmV total power.
Optical power test point
(see below)
Enables monitoring of the optical output level of the module. The nominal
scale factor is 1.0 V/mW when the module is enabled under normal
operating conditions. Note that the optical power test point does not track
changes in optical power due to the laser tracking error.
Transmitter enable
A green LED (
ON) that provides visual indication of the transmitter’s enable
status.
Fault indicator
A single red LED that lights when the module current is outside the normal
operating range, the laser output power is below normal limits, or the laser
current is above normal limits. Because the laser output requires a short
period of time to stabilize, it is acceptable for the fault indicator to
illuminate during the stabilization interval (approximately 10 seconds).
Nominal Optical Power Test Point Table
Table 4-4 provides test point and optical power values for all models of the SG4-* transmitter.
Table 4-4
SG4-* transmitter models and optical power test point table
Transmitter Model Optical Power Test Point Voltage Optical Power
SG4-IFPT
0.375 V through 0.425 V 0.375 mW through 0.425 mW
SG4-EIFPT
0.945 V through 1.055 V 0.945 mW through 1.055 mW
SG4-DFBT
0.945 V through 1.055 V 0.945 mW through 1.055 mW
SG4-DFBT3
1.89 V through 2.11 V 1.89 mW through 2.11 mW
SG4-DFBT3-*-CWDM
1.89 V through 2.11 V 1.89 mW through 2.11 mW
SG4-IFPT Optical Transmitter
The SG4-IFPT is a 1310 nm isolated, Fabry-Perot return-path optical transmitter with a
nominal optical output power of 0.4 mW that you can use with a Motorola OmniStar GX2
®
RX200BX2 or similar return path optical receiver. This transmitter is a multimode device that
exhibits good dynamic range and is suitable for networks with limited link loss. The optical
modulation index (OMI) is 0.35 ±0.020.
- Installation and 1
- Operation Manual 1
- FDA Compliance 3
- Contents 4
- Modules 5
- Installation 6
- Figures 6
- Contents v 8
- Introduction 10
- Figure 1-2 11
- SG4000 – open 11
- Using this Manual 12
- Related Documentation 12
- Document Conventions 13
- If You Need Help 13
- Calling for Repairs 14
- Overview 15
- Housing 16
- Figure 2-3 17
- Housing port locations 17
- Gaskets 18
- Weather gasket 18
- (silicone rubber) 18
- RF gasket 18
- (woven wire) 18
- Network Monitoring 19
- Options and Accessories 19
- Electronics Package 20
- Figure 2-5 21
- Figure 2-6 22
- Configuration 23
- Bandpass Frequency 24
- Station Slope 24
- Bandpass Frequency Splits 25
- Level Control 26
- Port Entry 27
- Figure 2-10 28
- Bench Setup and Operation 29
- Figure 3-2 30
- Forward Path Configuration 31
- Forward Split 33
- Loss = 8.7 dB 34
- Forward Redundant Split 36
- PRI) and secondary (SEC) 38
- SW1 AUTO position 39
- Forward Segmented 2X 40
- Figure 3-14 43
- SEC RX PRI RX 44
- SW2 AUTO position 46
- Forward Segmented 4X 47
- Loss = 2.7 dB 48
- Return Path Configuration 50
- Combined Return 52
- Loss = 0.9 dB 53
- Combined Redundant Return 55
- Split Return 58
- Split Redundant Return 61
- Segmented Return 64
- Power Distribution Board 67
- Figure 3-37 68
- Power distribution board 68
- Figure 3-38 69
- SG4000 – fuse locations 69
- of the housing base. 20 A 70
- Power Supply Operation 71
- Ensure shunt F1 (30 A): 72
- 4-2 Modules 74
- SG4-R/* Optical Receiver 75
- 4-4 Modules 76
- 4-6 Modules 78
- Figure 4-4 79
- Figure 4-5 79
- SG4-* transmitter 79
- SG4-IFPT Optical Transmitter 80
- SG4-DFBT Optical Transmitter 81
- SG4000 RF Module 82
- Modules 4-11 83
- FSB Board 84
- SG4-PS Power Supply 85
- Adding Power Supply Modules 86
- Embedded Plug-in Module 87
- 4-16 Modules 88
- RF port 1 88
- RF port 6 88
- Ingress Control 89
- Status Monitoring 89
- Parameter 90
- Fiber Cables 92
- Figure 5-3 93
- Fiber management tray 93
- Figure 5-2 93
- 5-4 Installation 94
- Clamps Clamp 95
- 5-6 Installation 96
- Pedestal Mounting 97
- Grounding the SG4000 98
- Coaxial Cable Installation 99
- Closing the Housing 100
- Specifications 101
- A-2 Specifications 102
- Specifications A-3 103
- A-4 Specifications 104
- Torque Specifications 105
- Abbreviations and Acronyms 106
- Abbreviations and Acronyms-2 107
- 529086-001 108
- Visit our website at: 108
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