Return Loss Measurement Accuracy Verification - Anritsu S412E Maintenance Manual

Chapter 2 — Vector Network Analyzer Verification
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Return Loss Measurement Accuracy Verification

The following test can be used to verify the accuracy of return loss measurements. Measurement calibration of
the S412E is required for this test.
Equipment Required
• Calibration Tee, N male, Anritsu Model OSLN50-1
• 20 dB Offset Termination, N male, Anritsu Model SC7423
• 6 dB Offset Termination, N male, Anritsu Model SC7424
Procedure
1. Power on the S412E and put it into Vector Network Analyzer mode using the Menu button.
2. Preset the S412E by pressing the Shift key, then the Preset (1) key, then the Preset button on the
touchscreen.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
3. Press the Shift key and then the Calibrate (2) key.
4. Touch the Cal Type submenu button and choose 1-port.
5. Touch the Start Cal submenu button to begin the Open/Short/Load calibration.
6. Connect the Open, Short and Load to VNA Port 1 when prompted from the on screen instructions.
7. When the calibration finishes, choose "Calculate and Finish Cal".
8. Touch the Measure main menu button and set Measurement Type to Return Loss.
9. Touch the Scale main menu button and set the Top to 0 dB and the Bottom to –12 dB.
10. Connect the 6 dB Offset Termination to the VNA Port 1 connector of the S412E.
11. Touch the Marker main menu button and turn Marker Table On.
12. Touch the Peak Search and record the Marker TR1 value in
Accuracy" on page
13. Touch the Valley Search and record the Marker TR1 value in
14. Verify that both the Peak and Valley readings are within specification.
15. Disconnect the 6 dB Offset and connect the 20 dB Offset Termination to the VNA Port 1.
16. Touch the Scale main menu button and set the Top to –15 dB and the Bottom to –25 dB.
17. Touch the Peak Search and record the Marker TR1 value in
Accuracy" on page
18. Touch the Valley Search and record the Marker TR1 value in
19. Verify that both the Peak and Valley readings are within specification.
S412E MM
A-2.
A-2.
PN: 10580-00324 Rev. N
2-4 Return Loss Measurement Accuracy Verification
Table A-2, "VNA Return Loss Measurement
Table A-2.
Table A-2, "VNA Return Loss Measurement
Table A-2.
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