Motorola SG 2000 用户手册
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O v e r v i e w
2 - 1 5
SG 20 00 Ins tal la tion and O pera tion M anua l
Model Desc ription
Functio n
SG2-MCB
Manual control
board
board
This board locally controls the ingress switch and
receiver/transmitter A/B redundant switching if the node is not
equipped with status monitoring.
receiver/transmitter A/B redundant switching if the node is not
equipped with status monitoring.
SG2-SB/*
Strand bracket
Bracket for hanging a strand mounted node.
SG2-PS
Power supply
Provides the
+
24 V and
+
5 V dc supply to the station. It has an
extended voltage range and is power-factor corrected.
SG2-PS2
Power supply
Provides the
+
24 V and
+
5 V dc supply to the station.
SG2-
SERCAB/*
SERCAB/*
Service cable
A 6-fiber service cable that is available with SC/APC or
FC/APC connectors.
FC/APC connectors.
SG2-FE-
*/750
*/750
Forward
equalizers
equalizers
Used to increase output tilt at one or more ports in a 750 MHz
system. They are available in 1 dB increments from 2 dB
through 6 dB.
system. They are available in 1 dB increments from 2 dB
through 6 dB.
SG2-FE-
*/870
*/870
Forward
equalizers
equalizers
Used to increase output tilt at one or more ports in an 870
MHz system. They are available in 1 dB increments from 2 dB
through 6 dB.
MHz system. They are available in 1 dB increments from 2 dB
through 6 dB.
SG2-IS
Ingress switch
This switch enables the operator to troubleshoot without
shutting down the return path. It requires the use of either the
LL-SG2/* or the SG2-MCB.
shutting down the return path. It requires the use of either the
LL-SG2/* or the SG2-MCB.
SG2-LR
Lightwave
receiver
receiver
This receiver converts the received optical signal to
broadband RF.
broadband RF.
DS-SG2-DRRB Digital return
redundancy
board
board
This board provides the redundant input to a
DS-SG2-DRT/A-2X digital return transmitter. One DRRB is
used for each -2X transmitter.
DS-SG2-DRT/A-2X digital return transmitter. One DRRB is
used for each -2X transmitter.
SG2-*
Analog return
transmitters
transmitters
Table 2-1 identifies and describes the five optical analog
return-path transmitters.
return-path transmitters.
DS-SG2-DRT* Digital return
transmitters
Table 2-2 identifies all models of the optical digital return-path
transmitters. Section 5, “Operation,” provides detailed
information and block diagrams for each series of digital
transmitters.
transmitters. Section 5, “Operation,” provides detailed
information and block diagrams for each series of digital
transmitters.