User's Manual Part 3

In–Service Calibration – continued

Mar 2001

I-13

SCt4812T CDMA BTS Optimization/ATP

DRAFT

Follow the procedure in Table I-4 to perform the In–Service Calibration.

Table I-4: In–Service Calibration

Step Action

* IMPORTANT

Perform this procedure after test equipment has been allowed to warm–up and stabilize for a minimum

of 60 minutes.

1 Set up the LMF for In–Service Calibration:

– Start the LMF by double–clicking the LMF icon on the Windows desktop.

– Click Options>LMF Options from the menu bar at the login screen.

– Check only the applicable spectrum analyzer check box on the Test Equipment tab.

Ensure that the GPIB address is 18.

– Uncheck any other other equipment that is selected.

– Click the Apply button.

– Select the BTS Options tab in the LMF Option window.

– Check the In–Service Calibration check box.

– Click the Apply button.

– Click the Dismiss button to close the LMF Option window.

2 Login to the target BTS:

– Select the target BTS icon.

– Click the Login button at the login screen.

3 Measure the Cable Loss using the Cable Calibration function:

– Click Util>Cable Calibration from the menu bar at the main window.

– Set the desired channel(s) and select TX and RX CABLE CAL at the cable calibration pop up

window.

– Click the OK button to perform cable calibration.

– Follow the on–screen instructions to complete the cable loss measurement.

NOTE

– The measured value is input automatically to the cable loss file.

– To view the cable loss file, click Util>Examine>Cable Loss.

. . . continued on next page