3-2 Return Loss Accuracy Verification Cable and Antenna Analyzer Verification
3-2 PN: 10580-00253 Rev. J S3xxE MM
3-2 Return Loss Accuracy Verification
The following test is used to verify the accuracy of return loss measurements on the S3xxE in Cable and
Antenna Analyzer mode.
Equipment Required
• Open/Short Frequency: DC to 18 GHz Anritsu Model 22N50
• Termination Frequency: DC to 18 GHz, Return Loss: 40 dB min. Anritsu Model 28N50-2
• 6 dB Offset Termination Frequency: DC to 6.0 GHz Anritsu Model SC7424
• 20 dB Offset Termination Frequency: DC to 6.0 GHz Anritsu Model SC7423
Procedure
1. Verify that the S3xxE is in Cable and Antenna Analyzer mode and preset the unit.
2. Press the Measurement key, then press the Return Loss soft key.
3. Press the Shift key, then press the Calibrate (2) key.
4. Press the Start Cal soft 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 Top to 17 dB, and Bottom to 23 dB.
7. Verify that the trace is between 18.3 dB and 21.7 dB.
8. Press the Marker key and press the Marker to Peak soft key. Record the marker value, then press the
Marker to Valley soft key and record the marker value. Record the worst case of the two values in
Table A-15, “VNA Return Loss Accuracy Verification.
9. Remove the 20 dB offset and install the 6 dB offset.
10. Press the Amplitude key, set Top to 4.0 dB, and set Bottom to 8.0 dB.
11. Verify that the trace is between 4.8 dB and 7.2 dB.
12. Press the Marker key and press the Marker to Peak soft key. Record the marker value, then press the
Marker to Valley soft key and record the marker value. Record the worst case of the two values in
Table A-15.
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