Initial Power–up Tests and Procedures
68P64115A21–B
Sept 2003
1X SC 4812T-MC Multicarrier BTS Optimization/ATP
2-11
Initial Power-up (BTS)
The procedure must be performed on each frame after input power from
the common power supply has been verified. Follow the steps in
Table 2-5 to apply initial power to the cards/modules within the frame
itself, verifying that each is operating within specification.
Table 2-5:
Initial Power–up (BTS)
Step
Action
1
At the BTS, set the C–CCP (POWER) power distribution breakers (see Figure 2-3 on page 2-8) to
the
ON
position by
pushing in
the breakers.
2
Insert the C–CCP fan modules. Observe that the fan modules come on line.
3
! CAUTION
Verify the correct C–CCP power supplies by observing the locking/retracting tabs appear as follows:
Insert and lock the power supplies into their associated slots
one at a time
.
•
If no boards have been inserted, all three
PWR/ALM
LEDs would indicate RED to notify the user
that there is no load on the power supplies.
– If the LED is RED, do not be alarmed. After Step 4 is performed, the LEDs should turn GREEN;
if not, then a faulty power supply is indicated and should be replaced
before proceeding
.
STPN 4009B
PWR C–CCP 4812 +27V
4
Seat and lock all remaining circuit cards and modules in the C–CCP shelf into their associated slots.
5
Seat the first equipped PA module pair into the assigned slot in the upper PA shelf including PA fan.
6
Repeat Step 5 for all remaining PAs.
NOTE
Engage circuit breakers only for PAs that are equipped.
7
Set the PA breakers to the ON position
(per
configuration
) by pushing them IN
.
breaker panel layout
.
Engage (push) PA circuit breakers.
S
Confirm LEDs on PAs light.
8
After all cards/modules have been seated and verified, use a digital voltmeter to verify power supply
output voltages at the top of the frame remain within specifications:
On –48 V BTS:
–48 Vdc
nominal
On +27 V BTS:
+27 Vdc nominal
9
Repeat Steps 1 through 8 for additional co–located frames (if equipped).
2
