2-4 Return Loss Measurement Accuracy Verification VNA Performance Verification
2-4 PN: 10580-00303 Rev. D Model MS20xxB MM
15. Press the Enter key and wait until the measurement is complete.
16. Disconnect the Short, connect the Load of the Calibration Tee to VNA Port 1 and then press the Enter
key.
17. When the Load measurement is complete, press the Enter key again to select Calculate and Finish Cal.
18. Press the Scale main menu button.
19. Use the numeric keypad to enter 0.4 and then press the dB submenu button to set Resolution Per Div
to 0.4 dB.
20. Press the Reference Value submenu button. Use the numeric keypad to enter –20 and then press the dB
submenu button.
21. Connect the 20 dB Offset Termination to the VNA Port 1 connector of the VNA Master.
22. Press the Marker main menu button.
23. Press the Readout Format submenu button and press Table.
24. Press the Marker Search submenu button and press Peak Search. Record the Marker value.
25. Press Valley Search and record the Marker value.
26. Verify that both the Peak and Valley readings are within –20 ± 1.61 dB.
27. Disconnect the 20 dB Offset Termination.
28. Press the Scale main menu button.
29. Use the numeric keypad to enter 0.2 and then press the dB submenu button to set Resolution Per Div
to 0.2 dB.
30. Press the Reference Value submenu button. Use the numeric keypad to enter –6 and then press the dB
submenu button.
31. Connect the 6 dB Offset Termination to the VNA Port 1 connector of the VNA Master.
32. Press the Marker main menu button.
33. Press the Marker Search
submenu button and press Peak Search. Record the Marker value (refer to
Step 37).
34. Press Valley Search and record the Marker value.
35. Verify that both the Peak and Valley readings are within –6 ± 0.95 dB.
36. Disconnect the 6 dB Offset Termination.
37. Enter the worst case values of the Peak and Valley reading that were recorded for Step 26 and Step 35
into the test record in Appendix A.
• MS2024B – Table A-2, “VNA Return Loss Measurement Accuracy” on page A-2
• MS2025B – Table A-4, “VNA Return Loss Measurement Accuracy” on page A-3
• MS2034B – Table A-6, “VNA Return Loss Measurement Accuracy” on page A-4
• MS2035B – Table A-31, “VNA Return Loss Measurement Accuracy” on page A-15
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