User Manual

BTS Overview68P09255A57-2
Aug 2002
SC4812ET Optimization/ATP Manual Software Release R16.1.x.x
PRELIMINARY
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Span I/O Board
The Span I/O Board provides the interface for the span lines from the
CSU to the C-CCP backplane (see Figure 1-6).
RF Diagnostic Subsystem
The RFDS provides the capability for remotely monitoring the status of
the SC 4812ET RF Transmit and Receive paths (Figure 1-7).
Heat Exchanger
The Heat Exchanger provides cooling to the internal compartment of the
RF Cabinet. The fan speed of the heat exchangers adjusts automatically
with temperature. The Heat Exchanger is located in the primary front
door of the RF Cabinet.
SC 4812ET Interface Board (ETIB) & LPA Control Brd
(LPAC)
The ETIB is an interconnect board showing status LEDs for the RF
Cabinet, as well as providing secondary surge protection. The LPAC
board provides the interface for the LPA connection.
SC 4812ET Trunking Backplane
The Trunking Backplane contains a complex passive RF network that
allows RF signals to share the resources of a bank of four LPAs. It also
provides DC Power and digital interconnect.
Figure 1-5: SC 4812ET Intercabinet I/O Detail (Rear View)
SPAN I/O
RFGPS
RF CABINET
(Rear View)
RFDS Expansion
RF Expansion
Exp. Punch
Punch
Block
Block
27V
27V Ret
DC Conduit
Pilot Beacon
Microwave
RF GPS
LAN
2 Sec Tick
19 MHz Clock
Ground Cable
Lugs
1-3 Sector Antennas
4-6 Sector Antennas
Span/Alarm
Expansion 1
Expansion 2
RF CABINET
(Rear Door closed)
RGPS
FW00147
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