Ericsson LBI-39128 manual Bi-directional Power Sensors

Page 20

LBI-39128

INSTALLATION

power (P in watts), and compare with the actual power measurement on the power meter. Because the table does not contain all values of V and P, you may need to interpolate to get the values you need.

7.Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 6 and 7 until the measured power is the same as the power from the table.

8.Turn off the 12V station power supply for the transmitter.

9.Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

10.Remove the wattmeter from between the power sensor and the coax to the combiner, and re-connect the coax to the power sensor.

11.Turn on the 12V station power supply for the transmitter.

12.Repeat steps 1 through 11 for the next transmitter until each transmitter has had its power sensor calibrated.

Bi-directional Power Sensors

Use the following procedure to calibrate the bi- directional power sensors used at the output of each combiner. Start with the combiner that feeds antenna #1. The locations of the calibration screws are shown in Figure 21.

Reflected Power

Calibration Screw

Reflected Power

Calibration Screw

Forward Power

Forward Power

Figure 21 - Bi-directional Power Sensor Calibration Screws

1.Disconnect the coax (from the power sensor to the antenna) at the power sensor end, and insert an in-line wattmeter set to measure forward power (make sure the wattmeter is rated high enough to handle the power from all the transmitters feeding the combiner).

2.Disconnect the power sensor cable from the phono connector for the forward power on the power sensor, and attach the DC voltmeter in its place (center pin is

positive). (An alternate method is to disconnect the power sensor cable at the PMU - see interconnection diagram at end of manual - and attach the DC voltmeter to the end of the cable.)

3.Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.

4.Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the equivalent power calculation (P in watts), and compare with the actual power measurement on the power meter.

5.Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 4 and 5 until the measured power is the same as the power from the table.

6.Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

7.Set the in-line wattmeter to measure reflected power.

8.Disconnect the power sensor cable from the phono connector for the forward power on the power sensor, and attach the DC voltmeter in its place (center pin is positive).

9.Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.

10.Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the equivalent power calculation (P in watts), and compare with the actual power measurement on the power meter.

11.Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 10 and 11 until the measured power is the same as the power from the table.

12.Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

13.Remove the wattmeter from between the power sensor and the coax to the combiner, and re-connect the coax to the power sensor.

14.Repeat steps 1 through 13 for the other combiner (if two transmit antennas are used).

20

Image 20
Contents Installation & Operation Contents Table of Contents Figures and Tables List of Figures and TablesSpecifications SpecificationsLBI-39128 Personality Proms VAX Site Controller ComputerApplication Software Proms Site Controller Hardware Site Controller SoftwarePMU Hardware Application Software PROMsPersonality PROMs Addition from No PMUProcedure Parts RequiredDB-9 M DB-9 F Upgrade from Old PMU Trunking CardAdaptation from Old PMU Initial POWER-UP Software Initialization Terminal SetupPMU Programming 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 MonitorSWR Calculations AlarmsPower Measurements Alarm Reporting Transmitter AlarmsAntenna Alarms Excessive AlarmsChannel PMU Enable Site PMU EnableParameters PMU ModelOperation Transmitter Lower Alarm Limit Transmitter Upper Alarm LimitAntenna Lower Alarm Limit Antenna Upper Alarm LimitAlarm Limit RE-CONFIGURATION Transmitter Power Alarm LimitsAlarm Limits As Installed Antenna Power Alarm LimitsAntenna SWR Alarm Limit Time and Date Adjustment Diagnostic ScreensAlarm History Report Screen 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.