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Performing Tests
TX Test Port Cable Calibration Test
Chapter 4
O:\Manuals\E6385A_Cdma\Book\perf-tst.fm
76
TX Test Port Cable Calibration Test
This utility measures the signal loss through the cable used to connect the Test Set to
the Base Station TX Test Port. This is the Base Station port that samples the
transmitter output of the BCR through a directional coupler. This loss must be known
when making power measurements. Once this value is measured, you should label the
cable indicating the loss through it for future use. This utility sends no control
commands to the MSC.
This routine requires the use of two external 6 dB attenuators (pads) and a short
calibration cable. These parts are not standard equipment with the Test Set, but are
included in the optional accessory kits (see “Accessory Kits” on page 17).
Parameters and Specifications Used
The following specifications and parameters are used when running this test. See
Chapter 5, “Reference,” for descriptions of the specifications and parameters.
Parameters:
• 21. TX Test Port Cable Loss
Specifications (Pass/Fail Limits):
None used for this test.
Select and Run the Utility
Perform the TX Test Port Cable Calibration routine as follows:
Step 1. From the Lucent CDMA Tests Main Menu screen, select the Calibration/Utilities
field. The Test Software will display the Calibration/Utilities Menu screen.
Step 2. Select the TX Test Port Cable Calibration field.
Step 3. Follow the displayed instructions to connect the 6-dB pads and calibration cable, then
press the
k1 (Proceed) key.
Step 4. Follow the displayed instructions to connect the test cable in series with the calibration
cable and pads, then press the
k1 (Proceed) key.
Review the Results
The Test Software will display the measured insertion loss and test frequency. Press the
k1 (Proceed) key to continue. The Test Software will display a query asking if you wish
to store the insertion loss as the TX Test Port Cable Loss. Use the knob to select Yes or
No.
•If you select Yes, the Test Software will enter the value in the Test Configuration
Menu screen automatically. Unless you believe that the indicated loss is incorrect,
you should select Yes.
•If you select No, the Test Software will display a query asking if you wish to
Remeasure the loss or Return to the Calibration/Utilities Menu screen.