
Site Preparation
– continued
Apr 2001
41
SC
TM
4812ET RF and Power Cabinet Hardware Installation Manual
DRAFT
Table 2-4: SC 4812ET FRU Configurations – Non–Duplexed
Con–
fig
Expansion
Impact to
Service
Expansion Field
Recabling
BTS 2 – Expansion
BTS 1 – Starter
Ttl #
Sec
Car
Con–
fig
Expansion
Impact to
Service
Expansion Field
Recabling
TX
Ant
RX
Ant
TRDCs
4812
4:1
Cmbr
4812
2:1
Cmbr
4812
DBPF
Trnk
Mod
VH
LPAs
TX
Ant
RX
Ant
TRDCs
4812
4:1
Cmbr
4812
2:1
Cmbr
4812
DBPF
Trnk
Mod
VH
LPAs
Ttl #
Sec
Car
8
car
None
Add Tx cable trunking
module to combiner
3
3
3
3
3
NA
4
16
3 (6
opt)
3
6 (3
opt)
3
NA
NA
4
16
24
NOTES: Tx combiners typically not used until system exceeds 2 carriers.
Duplexed diversity Rx antennas are routed to TRDCs in expansion frame and then diversity Rx expansion is routed back to starter frame.
Tx paths are NOT routed between expansion and starter frames (i.e. each frame must have its own Tx antennas which reduces loss).
When expansion frame is added, the unused TRDCs in the starter frame could be removed and replaced with cover plates, but it is not recommended due to the time involved.