User's Manual Part 3

RBS 2308 and RBS 2309 User’s Guide
Dimension Torque Nm Remark
M4 1.7 Nm ± 0.15 Nm
Reduced torque for
captive screw
M8 21 Nm ± 1.3 Nm Earth nut
Table 62 Connectors
Connector
Torque Nm Remark
TNC
1.7 Nm ± 0.15 Nm
–
N 2.7 Nm ± 0.2 Nm
–
10.3 Fault Localization Using OMT
This section contains information on how to localize a fault when handling
an alarm in the OMT. Ericsson recommends that the OMT is used, but if no
OMT is available, or it is not possible to connect to the RBS, see Section 10.4
Troubleshooting Using the RBS Indicators on page 193.
The section is based on the Replacement Unit Map (RU Map) connected to an
alarm. The RU Map consists of two different kinds of RUs:
• Physical Units
The following RUs are mapped to one single physical unit that can be
replaced in the field.
− IXU
− RRU
− TIM (only if an IXU with R-state lower than R5A is used)
− PSTU
− Fan unit
• Logical units
The following RUs are handled as one unit, but can actually be one or
more physical units.
− Antenna: The logical path from the RRU to (and including) the antenna
− Battery: The battery backup system including batteries
− Environment: External conditions (ambient temperature and site power)
− GPS receiver: The synch. signal received and distributed by the GPS
receiver
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EN/LZT 720 0027 Uen R8A 2006-06-27