8163A/B, 8164A/B, 8166A/B User’s Guide 211
Return Loss Measurement 7
When you enter a value for the Front Panel Delta, <FPDelta>, the
instrument automatically performs the following calculation:
Calculating the Insertion Loss of the DUT
Insertion Loss is explained in What is Insertion Loss? on page 178.
To measure the insertion loss you must measure the power transmitted
through the measurement cable, see Measuring the Power Transmitted
Through the Measurement Patchcord on page 205 and the power
transmitted through the DUT, see Measuring the Power Transmitted
Through the DUT on page 206.
The equation below gives the insertion loss of the DUT, IL
DUT
: