Network Analyzer Calibration Procedure

The network analyzer used in certain adjustments must be calibrated with the cable and adapter prior to running the adjustment. The calibration will need to be repeated once every three days or if the adapters or cables have been disturbed. If it's been within the three day time-frame and the adapters and cables have not been disturbed, then the network analyzer calibration is not necessary and you may proceed with the adjustment.

The following adjustments require a calibrated network analyzer–cable–adapter assembly:

1. Downconverter Base Path Loss

2. Downconverter RF Preamp

3. Downconverter RF Attenuator

4. Downconverter IF Attenuator

Required Test Equipment

Connection Setups and Procedures

Follow the steps below to calibrate the network analyzer. Click on the links to show the calibration procedures and connection images. To expand all, click the Expand All button in the toolbar (webhelp only).

1. Click here for power sensor calibration.

    

   In all procedures using a power meter, the network analyzer must be connected to the LAN.

   Power sensor calibration setup

   

   The power meter used in these procedures will be controlled by the network analyzer through the GPIB connection from the power meter to the network analyzer. Therefore the power meter needs to be added to the Keysight Connection expert via a remote GPIB interface.

   The following steps will explain how to configure the power meter's remote GPIB interface.

   When using an NI = National InstrumentsNI IO card or NI USB-to-GPIB converter, be sure that the NI-VISA Passport for Tulip has been enabled to recognize and detect Keysight hardware. Refer to the following document for more detailed troubleshooting instructions: http://literature.cdn.keysight.com/litweb/pdf/5990-3731EN.pdf

   1. Open the Keysight Connection Expert.

   2. Select Manual Configuration Add New Instruments/Interfaces Remote GPIB Interface.

   3. Enter the Hostname or IP Address of the network analyzer (as the host for the power meter) under Specify Connection Information.

   4. Click Test Connection to verify that the connection works. Under Configure GPIB Properties, verify that Auto-Discover Instruments Connected to This Interface is checked.

   5. Click Accept.

      Click here for image.
      
      

      

   6. Verify that the power meter has been added via a remote GPIB interface on the Instruments view.

      Click here for image.
      
      

      

       

      Be sure that this interface information for the power meter is correctly entered into TME.

      

    

2. Click here for power calibration.

    

   1. Connect the 2.4 mm (f) end of the cable to Port 1 of the network analyzer.

   2. Connect the 2.4 mm (m) end of the cable to a 2.4 mm (f-to-f) barrel adapter.

   3. Connect the 2.4 mm barrel adapter to the 1.85 mm (m) connector of the power sensor.

   4. When disconnecting from the power sensor after the calibration is complete, be sure that the 2.4 mm barrel adapter stays on the cable and is properly torqued.

   Power calibration setup

   

   

    

3. Click here for S-parameter calibration.

    

   1. Leave the 2.4 mm cable attached to Port 1 of the network analyzer. Leave the 2.4 mm barrel adapter on the cable and attach it to Port B of the ECal module.

   2. Attach Port A of the ECal module to Port 2 of the network analyzer using a 2.4 mm (f) to 2.4 mm (m) cable.

   3. When disconnecting the cable/adapter from Port B of the ECal module, be sure that the 2.4 mm barrel adapter stays on the cable and is properly torqued.

   S-parameter calibration setup

   

   

    

4. Click here for power verification.

    

   1. Leave the 2.4 mm cable attached to Port 1 of the network analyzer. Leave the 2.4 mm barrel adapter on the cable and attach it to the 1.85 mm (m) connector of the power sensor.

   2. When disconnecting from the power sensor after the verification is complete, be sure the 2.4 mm barrel adapter stays on the cable and is properly torqued.

   Power verification setup

   

   

    

5. Click here for the DUT calibration.

    

   1. Leave the 2.4 mm cable attached to Port 1 of the network analyzer.

   2. Leave the 2.4 mm barrel adapter on the cable and attach it directly to the RF Output of the DUT using a 2.4 mm (m) to 3.5 mm (m) adapter.

   DUT calibration setup