User's Manual

Test Set Calibration68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
3-81
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 loss values in
the cable loss files. The cable loss values can also be set or changed
manually.
CAUTION
If cable calibration was performed without using the LMF, cable
loss values must be manually entered in the LMF database.
Failure to do this will result in inaccurate BTS calibration and
reduced site performance.
Prerequisites
S LMF is logged into the BTS
Table 3-29: Setting Cable Loss Values
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:
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 with changes, click on the Save button to save displayed values.
7
Click on the Dismiss button to close the window.
NOTE
S Values entered or changed after the Save button was used will be lost when the window is
dismissed.
S If cable 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. It is not necessary to log out and
log back into the LMF for changes to take effect.