Advertisement
68P64115A21–B
Initial Power–up Tests and Procedures
Power-up Procedures
Sept 2003
WARNING
Potentially lethal voltage and current levels are routed to the
BTS equipment. This test must be performed with a second
person present, acting in a safety role. Remove all rings, jewelry,
and wrist watches prior to beginning this test.
DC Input Power
In the tests to follow, power will first be verified at the input to each
BTS frame. After power is verified, cards and modules within the frame
itself will be powered up and verified one at a time.
Before applying any power, verify the correct power feed and return
cables are connected between the power supply breakers and the power
connectors at the top of each BTS frame. Verify correct cable position
referring to Figure 2-3 on page 2-8.
NOTE
For positive power applications (+27 V):
The positive power cable is red.
S
The negative power cable is black.
S
For negative power applications (–48 V):
The negative power cable is red or blue.
S
The positive power cable (ground) is black.
S
Motorola recommends that the DC input power cable used to connect the
frame to the main DC power source conforms to the guidelines outlined
in Table 2-3.
Table 2-3: DC Input Power Cable Guidelines
Maximum Cable Length
30.38 m (100 ft)
54.864 m (180 ft)
Greater that 54.864 m (180 ft)
NOTE
Make sure the connector adapters are securely attached to each of
the BTS power feeds and returns. Also, make sure the cables
have been properly installed into each connector.
1X SC 4812T-MC Multicarrier BTS Optimization/ATP
Initial Power–up Tests and Procedures
2
107 mm
2
185 mm
Not recommended
Wire Size
(AWG #4/0)
(350 kcmil)
2-9
2
Advertisement
Chapters
