LBI-39128

OPERATION

SWR Upper Limit

This parameter is used by the PMU as the upper alarm limit for each antenna’s SWR. Its purpose is to detect when the antenna or coax to the antenna is damaged. The recommended value for this limit is 2.0, which is equivalent to about 11% reflected power.

This parameter is not programmed into the Site Controller computer’s Personality PROMs and is therefore not re-configurable through a System Manager. The value of this parameter is only contained in the PMU.

A factory default value (2.0) for this parameter has been programmed into the PMU. This factory default is used to configure the PMU’s Active Configuration any time the PMU is Initialized. The value of this parameter may be re- configured with an RS232 CRT terminal connected to the PMU. This re-configuration will last until you deliberately initialize the PMU. This re-configuration permits a different upper alarm limit for each antenna’s SWR.

Antenna Mapping

Antenna Mapping is described under the PMU Programming heading in the Installation section.

Transmitter Power Alarm Limits

The upper and lower alarm limits for each transmitter’s output power may be re-configured as follows:

1.With the Operational Select Menu (main menu) shown on the terminal, type 4 (for item #4 - Setup) and press the Enter key.

2.With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

3.At the “Enter Channel Number” prompt, type the channel number of the transmitter and press the Enter key. The Analog Input Channel screen for that transmitter channel should then appear on the terminal.

4.Type 6 (for item #6 - Lower Alarm Limit) and press the Enter key.

5.At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value. (This is a temporary configuration.)

6.Type 7 (for item #7 - Upper Alarm Limit) and press the Enter key.

ALARM LIMIT RE-CONFIGURATION

Alarm Limits As Installed

As installed per the Installation section, the alarm limits are as follows:

Transmitter Upper Power Limit = 125.0 watts

Transmitter Lower Power Limit = Determined by the Site Controller computer’s Personality PROMs or the re-configured value with the System Manager.

Antenna Upper Power Limit = 999.9 watts

Antenna Lower Power Limit = 0.0 watts

Antenna Upper SWR Limit = 2.00

These alarm limits may be changed in the PMU’s Active Configuration with a terminal connected to the PMU. See the PMU Programming heading in the Installation section to set up the terminal and obtain programming access.

7.At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value.

8.Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the re-configuration of the Upper and Lower Alarm Limit parameters for the selected transmitter channel number. If this parameter needs to be changed for another transmitter, repeat steps 2 through 8 for that transmitter. (Remember that the lower alarm limits you re- configure here are just temporary. These limits will be re- configured to the single value of this parameter in the Site Controller computer’s Active Configuration each time the Site Controller computer sends the EDACS Configuration Setup to the PMU.)

Antenna Power Alarm Limits

The upper and lower alarm limits for the antenna’s input power may be re-configured as follows:

1.With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

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Ericsson LBI-39128 manual Alarm Limit RE-CONFIGURATION, SWR Upper Limit, Transmitter Power Alarm Limits

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.

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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.

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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.