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Motorola SG 2000 operation manual Forward Path, Signal flow diagram

Models: SG 2000

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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 lid

SG2 RF chassis

SG2-ABJ/P

SG2-FBS

forward

JXP

forward

A/B

band

jumper

split

HP

TP

filter

-1.5

Receiver C

JXP

JXP

+15 Lo

TP

+21.5 Hi

Receiver B

JXP

SG2-FJB/P

TP

Switch

forward

jumper

Receiver A

JXP

board

+24 VDC

Power supply

+5 VDC

ACV

Data lines

Status monitor

Power supply

				ADU		POT			-8.0
									-8.0
									Splitter
-2.0				-1.5			Splitter
-2.0				-1.5			Splitter

SG2-FRB		Attenuator		MDR
SG2-FRB		Attenuator		MDR

-2.0					+ 18.5
-2.0					+ 18.5
	@ Min atten				Amplifier

Splitter

Ingress control

	JXP			-1.0
		-1.0	Amplifier	Diplex
				filter	TP
	JXP	EQ	+18.5	H	TP
	JXP	EQ	+18.5

			-0.5	-1.0
	Ingress		-0.5	L	-0.5
			JXP	L
			JXP
	-2.0			-0.5
	-2.0			TP
				TP
			Amplifier	Diplex
				filter	TP
	JXP	EQ		H	TP
	JXP	EQ

	Ingress		JXP	L
	Ingress		JXP
				TP
			Amplifier	Diplex
		EQ		filter	TP
	JXP			H	TP
	JXP

	Ingress		JXP	L
	Ingress		JXP

-1.0

SG2-RPM/C

+8.5 -3.5

-0.5

Optical transmitter

JXP

-3.5

-2.0

-3.5

*

LP filter

TP

SG2-RPLPF

Optical transmitter

JXP

TP

**

SG2-RPM/S

-3.5

LP filter

-2.0

LP filter

SG2-RPLPF

All forward and return path test points (TP) are -20dB

*5dB

** With second transmitter pad = 5dB; without second transmitter pad = 15dB

	TP
Amplifier	Diplex
	filter
JXP EQ		TP
	H


Ingress JXP	L

TP

SG 2000 Installation and O peration Manual

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Motorola SG 2000 operation manual Forward Path, Signal flow diagram

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 Bold type Document ConventionsIf You Need Help Calling for Repairs Mounting Holes HousingSG 2000 housing dimensions front and side view 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 Analog Return Path Analog Return TransmittersModel Description Analog return transmitters SG2 transmitter block diagram JXP Digital Return Path Digital return transmitters DS-SG2-DRT-2X/A Options and Accessories Options and accessoriesLevel Control Model Description Function SG2-SB SG2-PS2SG2 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 Center conductor length Coaxial CablesFiber Cables Housing lid and fiber spool tray Fiber spool tray Installation Forward Path RF Configuration Single Receiver Mode Redundant Receiver Mode Broadband/Narrowcast ModeRedundant receiver Broadband/narrowcast AB Override Functionality Override Status Monitor/Manual Control Operation Status monitor/MCB operation Split return Analog Return Path RF ConfigurationRedundant 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 Removing SG 2000 Optical Modules Installing SG 2000 Optical ModulesSG 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 Optical Transmitter FeatureDescriptionSG2-IFPT features SG2 FPT Optical Transmitter Transmitter enableSG2-FPT features 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 DS-SG2-DRT-2X/A second RF input cable connection SG2-PS Power SupplySG2-PS power supply Status Monitoring Parameter Description Manual Control Board Description Function Alarm test point DB test pointPotentiometers ICS1 Through ICS4 Off Ingress ControlState Description Parameter Specification Table A-1 SG 2000 optical characteristicsTable A-2 Station RF characteristics Appendix a ParameterSpeci fic ation Parameter Table A-5 SG2-IFPT RF specificationsTable A-6 SG2-FPT RF specifications 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 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 channels Torque Fastener Screw Size Wrench Size In-lbs Ft-lbs DBc DBmDBmV MHz Return for service authorization Snap connectorNational Television Standards Committee Optical modulation index Mgbi