A tutorial on Co-axial Cable Insertion and Return Loss Measurements is available at www.tutorialsweb.com with the following contents:  What is return loss Return loss is a measure of VSWR (Voltage Standing Wave Ratio), expressed in decibels (db). The return-loss is caused due to impedance mismatch between two or more circuits. For a simple cable assembly, there will be a mismatch where the connector is mated with the cable. There may be an impedance mismatch caused by nick or cuts in a cable. At microwave frequencies, the material properties as well as the dimensions of the cable or connector plays important role in determining the impedance match or mismatch. A high value of return-loss denotes better quality of the system under test (or device under test).  For example, a cable with a return loss of 21 db is better than another similar cable with a return loss of 14 db, and so on.   Equipment required to measure return-loss of a co-axial cable Measurement of Co-axial cable losses Insertion loss measurement Return loss measurement The relation between VSWR and Return Loss (Conversion formulas) Glossary of terms References Please read the complete article at tutorialsweb.com.

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