3-3 Return Loss Accuracy Verification Cable and Antenna Analyzer Verification
3-2 PN: 10580-00255 Rev. J MT8212E and MT8213E MM
3-3 Return Loss Accuracy Verification
The following test can be used to verify the accuracy of return loss measurements. Measurement calibration of
MT821xE in Cable and Antenna Analyzer mode is required for this test.
Equipment Required
• Open/Short, Anritsu Model 22N50
• Termination, Anritsu Model 28N50-2
• 6 dB Offset Termination, Anritsu Model SC7424
• 20 dB Offset Termination, Anritsu Model SC7423
Procedure
1. Verify that the MT821xE is in Cable and Antenna Analyzer mode and preset the instrument.
2. Press the Measurement key, then press the Return Loss submenu key.
3. Press the Shift key, then press the Calibrate (2) key.
4. Press the Start Cal submenu key. Follow the instructions on the screen to perform a calibration.
5. After the calibration is complete, install the 20 dB offset termination.
6. Press the Amplitude key, set To p to 17 dB, and set Bottom to 23 dB.
7. Verify that the data display falls between 18.4 dB and 21.6 dB.
8. Press the Marker key and press the Marker to Peak submenu key. Record the marker value, then press
the Marker to Valley submenu key and record the marker value. Record the worst case of the two values
into Table A-15, “VNA Return Loss Accuracy Verification” on page A-13.
9. Remove the 20 dB offset and install the 6dBoffset.
10. Press the Amplitude key, set To p to 4.0 dB, and set Bottom to 8.0 dB.
11. Verify that the data display falls between 5dB and 7dB.
12. Press the Marker key and press the
Marker to Peak submenu key. Record the marker value, then press
the Marker to Valley submenu key and record the marker value. Record the worst case of the two values
into Table A-15.
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