User's Manual

Troubleshooting: SCCP Backplane – continued
6-24 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
CIO Connectors
S RF RX Antenna Path Signal Inputs are routed through RX Paths of
the DRDCs or TRDCs at the RF Interface Panel (rear of the frame),
and through COAXial Cables to the two MPC Cards.
The three “A” (Main) Signals go to one MPC; the three “B”
(Diversity) Signals to the other. The MPC outputs the
low–noise–amplified signals through the SCCP Backplane to the CIO
where the signals are split and sent to the appropriate BBX.
S A Digital Bus then routes the Baseband Signal through the BBX, to
the SCCP Backplane, and then on to the MCC Slots.
S Digital TX Antenna Path Signals originate at the MCC Cards. Each
output is routed from the MCC Slot through the SCCP Backplane to
the appropriate BBX.
S TX RF Path Signal originates from the BBX, travels through the
SCCP Backplane to the CIO, through the CIO, and then through
multi-conductor COAXial Cabling to the Trunking Module and LPA
Modules in the LPA Shelf.
SCCP Backplane
Troubleshooting Procedure
The following tables provide standard procedures for troubleshooting
problems that appear to be related to a defective SCCP Backplane. The
tables are broken down into possible problems and steps that should be
taken in an attempt to find the root cause.
All steps in all tables should be followed before any
attempt to replace the SCCP Backplane.
NOTE
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