User's Manual Part 2

Pre–Power–up Tests – continued
Mar 2001
2-9
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Figure 2-5: –48 V BTS DC Distribution Pre-test
4
1
5
2
7
6
3
8
P
9
O
W
E
R
30
40
40
30
40
40
30
40
40
POWER INPUT
TOP OF FRAME
C–CCP BREAKER
LPA
BREAKER
4
GND
5 6
1
2 3
TX OUT
CAUTION
LIVE TERMINALSLIVE TERMINALS WIRED FOR –48 VDC
LFR
HSO/
Breakering:
 Two LPAs on each trunking backplane breakered together
 Designed for peak LPA current of 15 amps (30 amp breakers)
 Unused TX paths do not need to be terminated
 Single feed for C–CCP
 Dual feed for LPA
FW00483
1
2 3
1
2 3
1C
1A
2A
2C
3C
3A
4A
4C
L
P
A
1D
1B
2B
2D
3D
3B
4B
4D
30
30
30
30
30
30
30
30
2