Motorola SG 2000 operation manual Test-point voltage versus optical power, 0.3

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O p e r a t i o n

Optical input	TP Volts	Output (dBmV)	Output (dBmV)	Comments
level(dBm/mW)	(1 mW=1 V)	77 channels	110 channels
–2.0/0.6	0.6	21	19	Normal
–2.5/0.6	0.6	20	18	Normal
–3.0/0.5	0.5	19	17	Normal
–3.5/0.5	0.5	18	16	Normal
–4.0/0.4	0.4	17	16	Normal
–5.2/0.3	0.3	15	13	High level alarm

Typical output levels are approximately 2 dB greater than the minimum levels.

Optical modulation index (OMI) for 77 channels (per channel): 0.0403.

OMI for 110 channels (per channel): 0.0337.

Optical transmitter wavelength is 1310 nm.

Bold type indicates default values.

Figure 5-14 illustrates the relationship between test-point voltage (Vdc) and optical power (dBm):

Figure 5-14

Test-point voltage versus optical power

	5
	4
(dBm)	3
	2
	1
power	0
power	-1
Optical	-2
	-3
	-4
	-4
	-5
	-6
	0.25	0.50	0.75	1.00	1.25	1.50	1.75	2.00	2.25	2.50	2.75	3.00

Test point DC Voltage (Vdc)

1 Volt = 1 Mw optical power

10 Log10 x Voltage (DC) = optical power (dBm)

SG 2000 Installation and O peration Manual

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Contents A R L I N E Special Symbols that Might Appear on the Equipment Contents Installation E r a t i o nSpecification s Torque Specifications Abbreviations and AcronymsSG2-LR Tables N t e n t s Section SG 2000 closedFeatures include SG 2000 openUsing this Manual Related DocumentationIf You Need Help Document ConventionsBold type Calling for Repairs SG 2000 housing dimensions front and side view HousingMounting Holes Port Locations Port locationsHousing gaskets GasketsPower Supply SG2-PS2 power supplyConfiguration Network MonitoringTo suit system requirements the RF chassis cover. notation Signal flow diagram Forward PathE r v i e w SG2-LR receiver functional diagram SG2-LR ReceiverAnalog Return Path Analog Return TransmittersModel Description Analog return transmittersSG2 transmitter block diagram JXPDigital Return Path Digital return transmittersDS-SG2-DRT-2X/A Options and Accessories Options and accessoriesLevel Control Model Description FunctionSG2-SB SG2-PS2SG2 SG2-FEGain Selection Optical input versus 750 MHz gain10 illustrates the gain option selection chart for 870 MHz Optical input versus 870 MHz gainTilt Selection Relative level dB versus 750 MHz slope 77 channelsSG2 870 MHz Slope Chart Analog Channels, 220 MHz Digital Relative level dB versus 870 MHz slope 94 channelsSG2 870 MHz Slope Chart Analog Channels, 120 MHz Digital Relative level dB versus 870 MHz slope 110 channelsN 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 FiberInstallation Strand Wire Mounting Mounting bracket-front viewMounting 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 ModeRedundant Receiver Mode Broadband/Narrowcast ModeRedundant receiver Broadband/narrowcastAB Override Functionality OverrideStatus Monitor/Manual Control Operation Status monitor/MCB operationRedundant 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 returnDS-SG2-DRT-2X/A split return DS-SG2-DRT-2X/A redundant returnSG 2000 Optical Modules Installing SG 2000 Optical ModulesRemoving SG 2000 Optical Modules Cleaning the Optical Connector SG2 LR Optical ReceiverFeature Description Test-point voltage versus optical power 0.3Wavelength Selection Jumper Wavelength selection jumperSG2-IFPT features FeatureDescriptionSG2 Ifpt Optical Transmitter SG2-FPT features Transmitter enableSG2 FPT Optical Transmitter SG2-DFBT features SG2 Dfbt Optical TransmitterSingle red LED that lights if the hybrid current is outside SG2-DFBT/3 features SG2 DFBT/3 Optical TransmitterSG2-EIFPT features SG2 Eifpt Optical TransmitterDS SG2 DRT/A Digital Return Transmitter DS-SG2-DRT/AFeature DS-SG2-DRT/A featuresDS SG2 DRT 2X/A Digital Return Transmitter DS-SG2-DRT-2X/ADS-SG2-DRT-2X/A features DS-SG2-DRT-2X/A cable connector DS-SG2-DRT-2X/A installed in SGSG2-PS power supply SG2-PS Power SupplyDS-SG2-DRT-2X/A second RF input cable connection Status Monitoring Parameter DescriptionManual Control Board Description FunctionAlarm test point DB test pointPotentiometers ICS1 Through ICS4State Description Ingress ControlOff Parameter Specification Table A-1 SG 2000 optical characteristicsTable A-2 Station RF characteristics Appendix aParameterSpeci 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 specificationsTable A-9 SG2-EIFPT RF specifications Table A-10 SG2-DRT/A RF specificationsMinimum Optical Model Output Power DBm Table A-11 SG2-DRT-2X/A RF specificationsOption Watts ac Amps Power @90V @60V @52V @44V Channels Link Launch System Table A-14 SG2-75 performance, with 77 channelsTable A-15 SG2-87 performance, with 94 channels Table A-16 SG2-87 performance, with 110 channelsTorque Fastener Screw Size Wrench Size In-lbs Ft-lbs DBc DBmDBmV MHzReturn for service authorization Snap connectorNational Television Standards Committee Optical modulation indexMgbi