Ericsson LBI-39128 manual Troubleshooting, Symptom Possible Causes Corrective Action

Page 34

LBI-39128

MAINTENANCE

transmitter channels. Repeat steps 2 through 6 for each transmitter channel until all are re-configured.

TROUBLESHOOTING

After you think you have fixed a transmitter alarm problem, switch the transmitter off (12V power supply), then

back on. This will cause the next test call to be placed to that transmitter and thereby speed up the check-out process and the transmitter’s return to service.

Table 10 lists some of the possible causes and the corresponding corrective action for various symptoms that might be observed.

Table 10 - Troubleshooting Symptoms

SYMPTOM

POSSIBLE CAUSE(S)

CORRECTIVE ACTION

 

 

 

Constant antenna alarm for one antenna,

Lower (power) Alarm Limit is set too

Check and possibly re-configure the

but antenna appears to be OK.

high, Upper (power) Alarm Limit is set

alarm limit(s) (see the Parameters

 

too low, or Upper (SWR) Alarm Limit

heading in the Operation section).

 

is set too low.

 

 

 

 

 

Power sensor at antenna input needs

Check and possibly re-calibrate the

 

calibration or is defective.

power sensor (see the Power Sensor

 

 

Calibration heading in this section).

 

 

 

 

Cable from the power sensor to the

Check the continuity of the cable from

 

PMU (can be many cables and

the power sensor to the PMU (see the

 

connectors in series) is connected to the

interconnection diagrams at the end of

 

wrong point or is defective.

this manual).

 

 

 

 

PMU input circuit is defective.

Apply a dc voltage (negative ground) to

 

 

the power sensor end of the cable to the

 

 

PMU (see Table 7 for the voltage to

 

 

represent the expected power). If the

 

 

alarm remains, the cable or the PMU

 

 

input is defective.

 

 

 

Occasional antenna alarm for one

Power sensor at antenna input needs

Check and possibly re-calibrate the

antenna, but antenna appears to be OK.

calibration or is defective.

power sensor (see the Power Sensor

 

 

Calibration heading in this section).

 

 

 

No antenna alarm is reported when the

Lower Alarm Limit is set to zero.

Re-configure the Lower Alarm Limit

cables between the power sensor and

 

parameter for the antenna to some non-

the PMU are disconnected.

 

zero value (see the Parameters heading

 

 

in the Operation section).

 

 

 

 

 

 

 

(Continued)

 

34

Image 34
Contents Installation & Operation Contents Table of Contents Figures and Tables List of Figures and TablesSpecifications SpecificationsLBI-39128 Application Software Proms VAX Site Controller ComputerPersonality Proms Site Controller Hardware Site Controller SoftwarePersonality PROMs PMU HardwareApplication Software PROMs Addition from No PMUProcedure Parts RequiredDB-9 M DB-9 F Upgrade from Old PMU Trunking CardAdaptation from Old PMU Initial POWER-UP PMU Programming Terminal SetupSoftware Initialization Sentry PMU REV 8.6 12/07/94 Time/Date/Password Antenna Mapping Power Sensor Calibration Unidirectional Power SensorsBi-directional Power Sensors Final Check Startup MonitorPower Measurements AlarmsSWR Calculations Antenna Alarms Alarm ReportingTransmitter Alarms Excessive AlarmsParameters Channel PMU EnableSite PMU Enable PMU ModelOperation Antenna Lower Alarm Limit Transmitter Lower Alarm LimitTransmitter Upper Alarm Limit Antenna Upper Alarm LimitAlarm Limits As Installed Alarm Limit RE-CONFIGURATIONTransmitter Power Alarm Limits Antenna Power Alarm LimitsAntenna SWR Alarm Limit Alarm History Report Screen Time and Date AdjustmentDiagnostic Screens Channel Monitor ScreenAlarm History Report Site not Programmed Time Software Updates Erase ALL ProgrammingAlarm Delay Adjustment Troubleshooting Symptom Possible Causes Corrective ActionMaintenance Glossary GlossaryInterconnection Diagram PMU Interconnection Diagram Edacs Site Controller Cabinet

LBI-39128 specifications

Ericsson LBI-39128 is a comprehensive communication solution designed to meet the ever-evolving demands of modern telecommunications. It is renowned for its ability to enhance network performance while providing a robust framework for various communication technologies. This product primarily targets service providers, enabling them to maximize their operational efficiency and improve service delivery.

One of the key features of the LBI-39128 is its versatility in supporting multiple generation technologies, including 2G, 3G, LTE, and even 5G. This ensures that service providers can seamlessly integrate their existing infrastructure and gradually evolve towards more advanced network capabilities without the need for a complete overhaul. The product caters to a wide array of deployment scenarios, from urban environments with high user density to rural areas requiring expansive coverage.

In terms of network performance, the LBI-39128 excels with its advanced radio technologies. It employs Massive MIMO (Multiple Input Multiple Output) and beamforming techniques, which significantly enhance spectral efficiency and improve user experience. With multiple antennas transmitting and receiving signals simultaneously, users benefit from increased throughput and reduced latency, essential for applications such as video streaming and real-time communications.

Another critical characteristic of the Ericsson LBI-39128 is its focus on energy efficiency. The product integrates intelligent power management systems that optimize energy consumption, thereby reducing operational costs for service providers. This aligns with the growing emphasis on sustainable practices within the telecommunications industry.

Moreover, the LBI-39128 features advanced management and automation capabilities. Its network function virtualization (NFV) support enables operators to deploy virtualized network functions efficiently, allowing for dynamic scaling and resource allocation based on real-time demand. This agility is crucial for handling varying loads and enhancing the overall resilience of the network.

Security is also a primary consideration in the design of the LBI-39128. It incorporates robust encryption methods and secure access protocols to protect sensitive data and ensure the integrity of communication channels. This is particularly important in an age where cyber threats are becoming increasingly prevalent.

In summary, the Ericsson LBI-39128 is a state-of-the-art telecommunications solution that stands out due to its support for multiple technologies, advanced radio capabilities, energy efficiency, automated management, and robust security features. Its design reflects the needs of contemporary service providers, allowing them to build and sustain high-performance networks that meet the demands of future communications.