2-3 Return Loss Accuracy Verification S331L Performance Verification
2-2 PN: 10580-00323 Rev. B S331L MM
2-3 Return Loss Accuracy Verification
The following test can be used to verify the accuracy of return loss measurements. Open/Short/Load calibration
of the S331L in Cable and Antenna Analyzer mode is required for this test.
Equipment Required
• Open/Short Frequency: DC to 18 GHz Anritsu Model 22N50
• Precision Load: Anritsu Model SM/PL-1
• 6 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5905
• 20 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5906
Procedure
1. Verify that the S331L is in Cable and Antenna Analyzer mode and preset the unit.
2. Press the Measurement menu key, then press the Return Loss soft key.
3. Press the Calibration menu key.
4. Press the Start Calibration soft key. Follow the instructions on the screen using an OSL Cal Method and the
Standard Cal Type to perform a calibration.
5. After the calibration is complete, install the 6 dB offset termination.
6. Press the AutoScl (.) key to adjust the display for the current trace.
7. Record the min and max values in Table A-2, “Cable and Antenna Analyzer Return Loss Accuracy
Verification” on page A-2.
8. Remove the 6 dB offset and install the 20 dB offset.
9. Press the AutoScl (.) key to adjust the display for the current trace.
10. Record the min and max values in Table A-2.
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