Source Adjustment

Source Adjustment is a SERVICE Routine which should be performed when a component in the source chain is replaced, or when the PNA fails an annual calibration. It adjusts the PNA source power for flatness across its full frequency range.

This topic does NOT discuss Source Power Calibration, which calibrates a PNA source over the current measurement range.

Required Equipment

Note: The power sensor depends on the PNA frequency range. Depending on the PNA model, two power sensors may be required to test the full frequency range. The PNA front panel connector type will determine the cable used and if an adapter is required with the power sensor(s).

See list of supported power meters and sensors.

See PNA Accessories

Procedure

Note: You must be logged onto the PNA as an Administrator to perform an adjustment. Learn more.

1. Refer to your power meter documentation to ensure the proper calibration factors for the power sensor have been entered into the table on the power meter.

2. Connect a GPIB cable between the power meter and network analyzer (use the System Controller GPIB port if applicable.)

3. Ensure the power sensor(s) are connected to the power meter.

4. Click Utilities, then System, then Service, then Adjustments

5. At the Adjustments selection, click Source Adjustment

6. There are 3 different version of the Source Calibration software; all are slightly different. All have a button that is labeled "Calibrate" or "Adjust". This is the button that will begin the calibration process. Some versions will also have a button labeled "Verify" that will test the source calibration without making any changes. Other selections are for factory personnel use only.

7. Once begun, you must enter the power meter and sensor information. The software will verify the power meter and sensor. You are then prompted to connect the sensor(s) and cable as needed.

Connecting  sensors to the PNA

Additional Information

All ports are tested on all PNAs. Source calibration takes approximately 10 to 45 minutes to complete depending on the frequency range and model number of the PNA.

Troubleshooting

In the event there is a problem with Source Adjustment, please refer to the "Troubleshooting" chapter in the PNA Service Guide.

Data Storage

• The correction data is stored in the flash memory on the Test Set Mother Board.

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