LBI-39128

MAINTENANCE

Use the following procedure to disconnect the terminal when you are finished:

1.With the Setup Selection Menu shown on the terminal, Type 1 (for item #1 - Return To Operation Select Menu) and press the Enter key. The Operation Select Menu should then be shown on the terminal.

Table 8 - SWR Upper Limit

REFLECTED

SWR

POWER (%)

UPPER LIMIT

 

 

50

5.8

 

 

33

3.7

 

 

25

3.0

 

 

20

2.6

 

 

17

2.4

 

 

14

2.2

 

 

12

2.1

 

 

11

2.0

 

 

10

1.9

 

 

 

 

2.Type 1 (for item #1 - Disconnect) and press the Enter key. The “Disconnected - Hit Any Key To Connect” prompt should then appear on the terminal.

MAINTENANCE

POWER SENSOR CALIBRATION

It is recommended that the power sensors be re- calibrated every six months. Use the procedures under the Power Sensor Calibration heading in the Installation section to re-calibrate the power sensors.

TIME AND DATE ADJUSTMENT

It is recommended that the PMU’s time and date be checked (and adjusted if necessary) to agree with the System Manager every six months. This will make it easier to correlate a specific alarm reported to the System Manager with a specific event on the PMU’s Alarm History Report screen. Use the procedure under the PMU Programming heading in the Installation section to set the time and date.

DIAGNOSTIC SCREENS

When a terminal is connected to the PMU, as described under the PMU Programming heading in the Installation section of this manual, two screens are available that may be useful for diagnostic purposes. They are the Alarm History Report screen and the Channel Monitor screen.

Alarm History Report Screen

The Alarm History Report screen is a snapshot (at the time you select the screen) of the last 256 results of all monitoring that has exceeded an alarm limit, starting with the most recent first. This includes any monitoring that has exceeded an alarm limit during the initial delay period after a transmitter is keyed (which is not reported to the Site Controller computer as an alarm). Results of current monitoring that exceed an alarm limit will not be shown as they occur. To see the results of any new monitoring, you must re-select the screen to get a new snapshot.

This screen shows the actual measured or calculated value - not just that it was a transmitter alarm for channel #8 or an antenna alarm for antenna #1 (as is reported to the Site Controller computer). Connect the terminal to the PMU and access the PMU as described under the PMU Programming heading in the Installation section of this manual. Then use the following procedure to access the Alarm History Report screen:

1.With the Operation Select Menu (main menu) shown on the screen, type 2 (for item #2 - Reports) and press the Enter key. The Report Selection Menu should then appear on the terminal as shown in Figure 23.

2.Type 3 (for item #3 - Alarm History) and press the Enter key. The Alarm History Report screen should then appear on the terminal as shown in Figure 24.

Channel Monitor Screen

The Channel Monitor screen is used to display the power calculated by a specific Analog Input Channel or the SWR calculated by a specific Analog Pseudo Channel, whether the value exceeds the alarm limits or not. The Channel Monitor screen has two parts. The first part is a snapshot of the calculated value at the time the screen is selected (see Figure 25). It is shown only briefly before going on to the second part of the screen.

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Ericsson LBI-39128 manual Time and Date Adjustment, Diagnostic Screens, Alarm History Report Screen, Channel Monitor Screen

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 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.