User's Manual

Pre–Power–up Tests
68P09258A31–A
Oct 2003
1X SCt 4812T BTS Optimization/ATP
2-10
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:
S Two LPAs on each trunking backplane breakered together
S Designed for peak LPA current of 15 amps (30 A breakers)
S Unused TX paths do not need to be terminated
S Single feed for C–CCP
S 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