User's Manual Part 1

BTS Equipment Identification – continued
MAY 2004
1-25
1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU
PRELIMINARY
3. GLI3
4. MCC–1X (or MCC–DO)
5. MCC–1X (or MCC–DO)
6. MCC–1X or Filler Panel
7. BBX–1X (Carrier 1)
8. BBX–1X (Carrier 2)
9. cMPC
Power Supply Module
Occupies the first slot. The same assembly used in the SC48XX series.
Provides power to the cards on the CCP2 shelf.
CSA Card
Occupies the second slot. The Clock Synchronization Alarm card,
combines the functions of the SC4812’s CSM and AMR cards into one.
The CSA timing circuit receives a 1pps signal from the GPS. The CSA
timing circuit generates the CDMA timing signal to the BBX and MCC
cards.
During normal operation the CSA is set up to select the GPS as the first
reference source. With an HSO or MSO as backup, the CSA is set up to
select the HSO or MSO 1 pps as the backup reference source should the
GPS signal fail. .
GLI3 Card
Occupies the third slot. The same card used in the SC48XX series.
Provides interfaces, inter–card communications, operation, and
maintenance functions for all the devices in the CCP2 shelf.
MCC–1X Cards and MCC–DO
Occupies the fourth through sixth slots (MCC slots 1, 2, & 3).
Depending on configuration they will be MCC–1X cards (16s, 32s, 48s,
or 64s). MCC–1X 64s require packet backhaul configuration. This
implements the traffic and control (sync, paging, access) channels of the
BTS.
If the BTS is configured for MCC–Data Only (DO), then MCC slots 1
and 2 will be used with slot 3 containing an MCC–1X card or a filler
panel.
BBX–1X Cards
Occupies the seventh and eighth slots (BBX slots 1 & 4). The same
BBX–1X cards used in the SC48XX series. Provides the RF to digital
signal functions for the reverse and forward links.
cMPC
Occupies the ninth slot. Compact BTS Multicoupler Preselector Card.
Provides low–noise amplification for all RX path signals. DC voltages
are monitored on the RF devices and regulators and are used to generate
hard and soft alarms.
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