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Performing Tests
TX Test Port Cable Calibration
Chapter 4
O:\Manuals\E6385A_Amps\Book\perftst.fm
86
TX Test Port Cable Calibration
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 through a directional coupler in the Antenna Interface Frame. (This
loss must be known when making power measurements at this port. Once you have
measured this value, label the cable indicating the loss for future use.) This utility sends
no control commands to the MSC.
After measuring the cable loss, the Test Software will display the loss value and the
frequency used for the test, then display a query asking if you wish to store the value.
•If you select Yes, the Test Software will enter the value automatically in the Base
Station Configuration Menu. 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.
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 connector kit (see “Optional Accessory Kits” on page 17).
Parameters and Specifications Used
The following parameters and specifications are used when running this test. See
Chapter 5, “Reference,” on page 95 for descriptions of the parameters and specifications.
Parameters:
• 30. TX Test Port Cable Loss
Specifications (Pass/Fail Limits):
None used for this test.
Select and Run the Utility
Select and run the TX Test Port Cable Calibration utility as follows:
Step 1. From the Lucent AMPS Test 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 on-screen prompts to connect the 6 dB pads and calibration cable.
Step 4. Press the
k1 (Proceed) key to continue.
Step 5. Follow the on-screen prompts to connect the test cable in series with the calibration
cable and pads.
Step 6. Press the
k1 (Proceed) key to continue.