8163A/B, 8164A/B, 8166A/B User’s Guide 7
Contents
7 Return Loss Measurement
Getting Started With Return Loss 178
What is Return Loss? 178
What is Insertion Loss? 178
Equipment required 179
How to Choose a Light Source 180
Return Loss Modules 181
Calibration Measurements 183
Return Loss Measurement 184
Patchcord on RL module Output 184
Setup 184
Calibrating the Return Loss Module 188
Calibration using the Keysight 81000BR Reference Reflector 189
Calibration using the Keysight 81610CC Reference Cable 192
How to Measure Return Loss 198
Viewing the Calibration Values 199
A Background to Return Loss Measurement 203
Measuring the Reflected Power from a Component with Known Reflection
Factor
203
Measuring the Power Transmitted Through the Reflection
Reference
204
Measuring the Power when there are No Reflections 205
Measuring the Power Transmitted Through the Measurement
Patchcord
205
Measuring the Reflections from the DUT 206
Measuring the Power Transmitted Through the DUT 206
Calculating the Return Loss of the DUT 207
Calculating the Front Panel Delta 209
Calculating the Insertion Loss of the DUT 211
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