Splicing Fiber | Motorola SG 2000 specs

Section 4

Installation

Installation consists of splicing the six-fiber service cable to the transportation fiber, installing the housing and electronics on the messenger strand, applying power, and placing the unit in service.

To avoid excess weight and the possibility of damage during installation, the housing is normally mounted prior to inclusion of the electronic components. It is assumed that the node components have been removed, configured, and tested on the bench and only minimal alignment may be required following field installation.

Splicing Fiber

The six-fiber service cable can be spliced to the transportation cable at any time during the node installation. Splicing does not need to coincide with the installation of the housing.

Fusion splicing is recommended because it has low insertion loss and is the most reliable method. A technician experienced in splicing fiber should do the splicing.

To perform fusion splicing:

1Obtain the 50-foot, six-fiber service cable with the compression fitting from the node package. Figure 4-1 illustrates this cable:

Figure 4-1

Service cable connection and compression fitting

39.8” ± 1.5”

Water	Compression	Main	Service	Heat	SC/APC
seal nut	nut	body	cable	shrink	connectors

2Splice each fiber according to procedures recommended by the manufacturer of the splicing equipment being used. A blue-coded fiber is suggested for the forward signal distribution and a brown-coded fiber is recommended for the return path. Cleanliness in the work area is essential.

SG 2000 Installation and O peration Manual

Image 58

Motorola SG 2000 operation manual Splicing Fiber, Service cable connection and compression fitting

Contents

A R L I N E Special Symbols that Might Appear on the Equipment Contents Installation E r a t i o n Specification s Torque Specifications Abbreviations and Acronyms SG2-LR Tables N t e n t s Section SG 2000 closed Features include SG 2000 open Using this Manual Related Documentation If You Need Help Document ConventionsBold type Calling for Repairs SG 2000 housing dimensions front and side view HousingMounting Holes Port Locations Port locations Housing gaskets Gaskets Power Supply SG2-PS2 power supply Configuration Network Monitoring To suit system requirements the RF chassis cover. notation Signal flow diagram Forward Path E r v i e w SG2-LR receiver functional diagram SG2-LR Receiver Model Description Analog Return PathAnalog Return Transmitters Analog return transmitters SG2 transmitter block diagram JXP Digital Return Path Digital return transmitters DS-SG2-DRT-2X/A Level Control Options and AccessoriesOptions and accessories Model Description Function SG2 SG2-SBSG2-PS2 SG2-FE Gain Selection Optical input versus 750 MHz gain 10 illustrates the gain option selection chart for 870 MHz Optical input versus 870 MHz gain Tilt Selection Relative level dB versus 750 MHz slope 77 channels SG2 870 MHz Slope Chart Analog Channels, 220 MHz Digital Relative level dB versus 870 MHz slope 94 channels SG2 870 MHz Slope Chart Analog Channels, 120 MHz Digital Relative level dB versus 870 MHz slope 110 channels N c h S e t u p G u r e 3 2 0 0 0 R F c h a s s i s W e r i n g t h e N o d e Fuse Functi o n Rati ng Ype W e r S u p p l y S e t t i n g s Illustrates the location of the LO-HIjumper Single Power Supply or Commonly Po wered Redundant Supplies I c k C h e c k s F u n c t i o n a l T e s t i n g N u a l G a i n C o n t r o l Analog Retu rn Path R w a r d P a t h P a d d i n g B l e 3 2 0 0 0 p a d c h a r t s t a n d a r d g a i n B l e 3 2 0 0 0 p a d c h a r t h i g h g a i n G u r e 3 N k P e r f o r m a n c e G u r e 3 1 N c h S e t u p Install i n g t h e D S S G 2 D R R B B o a r d O p t i o n G u r e 3 1 S G 2 D R R B b o a r d Install e d G u r e 3 1 C a t i o n o f J X P s o n E p a c k Digital Transmitter Install i n g t h e S t a t u s M o n i t o r O p t i o n 2 0 0 0 a c t i v a t i o n W o r k s h e e t DC powering Service cable connection and compression fitting Splicing Fiber Installation Strand Wire Mounting Mounting bracket-front view Mounting bracket-rear and side views Fiber Cables Coaxial CablesCenter conductor length Housing lid and fiber spool tray Fiber spool tray Installation Forward Path RF Configuration Single Receiver Mode Redundant receiver Redundant Receiver ModeBroadband/Narrowcast Mode Broadband/narrowcast AB Override Functionality Override Status Monitor/Manual Control Operation Status monitor/MCB operation Redundant return Analog Return Path RF ConfigurationSplit return RF chassis and location of the SG2-RPM/C or SG2-RPM/S board Digital Return Path RF Configuration DS-SG2-DRT/A redundant return DS-SG2-DRT-2X/A split return DS-SG2-DRT-2X/A redundant return SG 2000 Optical Modules Installing SG 2000 Optical ModulesRemoving SG 2000 Optical Modules Cleaning the Optical Connector SG2 LR Optical Receiver Feature Description Test-point voltage versus optical power 0.3 Wavelength Selection Jumper Wavelength selection jumper SG2-IFPT features FeatureDescriptionSG2 Ifpt Optical Transmitter SG2-FPT features Transmitter enableSG2 FPT Optical Transmitter SG2-DFBT features SG2 Dfbt Optical Transmitter Single red LED that lights if the hybrid current is outside SG2-DFBT/3 features SG2 DFBT/3 Optical Transmitter SG2-EIFPT features SG2 Eifpt Optical Transmitter DS SG2 DRT/A Digital Return Transmitter DS-SG2-DRT/A Feature DS-SG2-DRT/A features DS SG2 DRT 2X/A Digital Return Transmitter DS-SG2-DRT-2X/A DS-SG2-DRT-2X/A features DS-SG2-DRT-2X/A cable connector DS-SG2-DRT-2X/A installed in SG SG2-PS power supply SG2-PS Power SupplyDS-SG2-DRT-2X/A second RF input cable connection Status Monitoring Parameter Description Manual Control Board Description Function Potentiometers ICS1 Alarm test pointDB test point Through ICS4 State Description Ingress ControlOff Table A-2 Station RF characteristics Parameter SpecificationTable A-1 SG 2000 optical characteristics Appendix a ParameterSpeci fic ation Table A-6 SG2-FPT RF specifications Table A-5 SG2-IFPT RF specificationsParameter Table A-7 SG2-DFBT RF specifications Table A-8 SG2-DFBT/3 RF specifications Table A-9 SG2-EIFPT RF specifications Table A-10 SG2-DRT/A RF specifications Minimum Optical Model Output Power DBm Table A-11 SG2-DRT-2X/A RF specifications Option Watts ac Amps Power @90V @60V @52V @44V Table A-15 SG2-87 performance, with 94 channels Channels Link Launch SystemTable A-14 SG2-75 performance, with 77 channels Table A-16 SG2-87 performance, with 110 channels Torque Fastener Screw Size Wrench Size In-lbs Ft-lbs DBmV DBcDBm MHz National Television Standards Committee Return for service authorizationSnap connector Optical modulation index Mgbi