Managing the Path Loss Tuning Points

After tuning the path loss matrices is complete, Atoll creates a tuning measurement file for each transmitter and stores it in

Figure 5.9: Selecting all CW measurement paths

For repeaters, Atoll also tunes the path loss matrix of both the donor transmitter and the repeater. The contribution of the repeater and donor to the measured value is calculated based on the ratio of calculated values between the repeater signal and the donor signal. Each evaluated contribution is then used as input to tune the path loss matrix of each element. For more information, please refer to the Technical Reference Guide.

5. Select one of the following display options:

- Display all the matrices: All path loss matrices are displayed.

- Display only invalid matrices: Only invalid path loss matrices are displayed.

The Available Results table lists the following information for each displayed path loss matrix: - Transmitter: The name of the transmitter or repeater.

- Locked: If the check box is selected, the path loss matrix will not be updated even if the path loss matrices are recalculated.

- Valid: This is a boolean field indicating whether or not the path loss matrix is valid.

- Reason for Invalidity: If the path loss matrix is indicated as being invalid, the reason is given here. - Size: The size of the path loss matrix for the transmitter.

- File: If the path loss matrix is not embedded, the location of the file is listed.

- Tuned: If the check box is selected, the initial path loss matrix obtained by the propagation model has been tuned by the use of real measurement data.

6. Select the tuning path loss matrices you want to manage using the available catalogue by holding CTRL and click the corresponding line in the Available Results table and then right-clicking. The context menu appears.

7. Select Path Loss Tuning Points from the context menu. The Path Loss Tuning Points dialogue appears.

8. Select one of the following display options: - All: All the tuning paths are displayed.

- Active Only: Only the active tuning paths are displayed.

The Available Results table lists the following information for each displayed tuning path, assuming each transmitter (or repeater) can have several ones coming from either the same or different measurement paths:

- Transmitter: The name of the transmitter or repeater. - File: The location of the tuning file.

- Name: The name of the tuning entry. Each entry is automatically named by Atoll based on the source of the tuning data. You can edit the name by right-clicking the line and selecting Properties from the context menu.

- Active: You can set each tuning path as active by selecting the check box. Only active entries are used to tune the path loss matrices. When several entries are active and therefore applied to the same transmitter (or repeater), the applicable tunings on the path loss matrix are realised in turn from the top to the bottom of the catalogue. - No. points: Displays the number of measurement points on the tuning path.

- X Radius (m): Displays the radius of the ellipse axis oriented in the same direction as the transmitter (or repeater) during the tuning session.

- Y Radius (m): Displays the radius of the ellipse axis perpendicular to the transmitter (or repeater) during the tuning session.

- Gain (dB): Displays the gain of the measurement receiver.

- Max. total correction (dB): Displays the user-defined maximum admissible total correction. - Max. local correction (dB): Displays the user-defined maximum admissible local correction.

- Min. Threshold (dBm): Displays the user-defined level under which measurement values are not taken into account for path loss tuning

- Total correction (dB): Displays the mean error between each measured value and its corresponding pixel in the path loss matrix. This is the correction which is applied globally to all the matrices during the first step of path loss tuning (For more information, please refer to the Technical Reference Guide).

- Valid: This is a boolean field indicating whether or not the measurement path data (excluding the antenna infor- mation) are valid.

- Reason for Invalidity: If the measurement path data is indicated as being invalid, the reason is given here. - Comments: Additional comments referring to the measurement entry are given in this field. You can edit the com-

ment by right-clicking the line and selecting Properties from the context menu.

You can import tuning files to replace an existing tuning or to benefit from a path loss tuning done by another user. The PTS files are imported using a DBF file containing all the information relative to matrices and their tuning.

To import a path loss tuning catalogue:

1. Click the Network tab in the Explorer window.

2. Right-click the Transmitters folder. The context menu appears.

3. Select Properties from the context menu. The Properties dialogue appears.

4. Click the Propagation tab. The path loss matrix information is listed in the Available Results table.

5. Select the tuning path loss matrices for which you want to import tuning files by holding CTRL and click the corre- sponding line in the Available Results table and then right-clicking. The context menu appears.

6. Select Import Path Loss Tuning Catalogue from the context menu. The Open dialogue appears. 7. Select the DBF path loss tuning catalogue file you want to import.

8. Click Open. The existing PTS files are replaced by the ones referenced in the catalogue file. Any additional files in the DBF catalogue file are added. You can work with the imported PTS files with the same options as files from a tuning carried out in the current project.