User's Manual

Test Set Calibration – continued
3-110 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
Setting Cable Loss Values
Cable Loss Values for TX and RX Test Cable Configurations are
normally set by accomplishing Automatic Cable Calibration using the
LMF and the applicable Test Equipment. The LMF stores the measured
Signal Loss Values in the Test Cable Insertion Loss Files. The Test
Cable Insertion Loss Values can also be set or changed manually.
If Cable Calibration was performed without using the
LMF, Test Cable Insertion Loss Values must be manually
entered in the LMF Database. Failure to do this will result
in inaccurate BTS Calibration and reduced site
performance.
CAUTION
Prerequisites
S LMF is logged into the BTS.
Table 3-35: Setting Cable Loss Values Procedure
n Step Action
1 Click Util in the BTS Menu Bar, and select Edit > Cable Loss in the Pull–down Menus.
–A Tabbed Data Entry Pop–up Window will appear.
2 Click on the TX Cable Loss Tab or the RX Cable Loss Tab, as required.
3 To add a new Channel Number, perform the following actions.
3a Click on the Add Row Button.
3b Click in the Channel # or Loss (dBm) Column, as required.
3c Enter the desired value.
4 To edit existing values, click in the Data Box to be changed and change the value.
5 To delete a row, click on the row and then click on the Delete Row Button.
6 For each tab that needs to be changed, click on the Save Button to save the displayed values.
7 Click on the Dismiss Button to close the window.
* IMPORTANT
S Values entered or changed after the Save Button was used will be lost when the window is
dismissed.
S If Test Cable Insertion Loss Values exist for two different channels, the LMF will interpolate for
all other channels.
S Entered values will be used by the LMF as soon as they are saved.
S It is not necessary to log out and log back into the LMF for changes to take effect.
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