Agilent Technologies 8163A - Calculating the Insertion Loss of the DUT

A Background to Return Loss Measurement with the HP 81534A Return Loss Measurement
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave
Multichannel System, Fourth Edition
151
Calculating the Insertion Loss of the DUT
Insertion Loss is explained in “What is Insertion Loss ?” on page 134.
To measure the insertion loss you must measure the power transmitted through
the measurement cable, see “Measuring the Power Transmitted Through the
Measurement Cable” on page 146 and the power transmitted through the DUT,
see “Measuring the Power Transmitted Through the DUT” on page 147.
The equation below gives the insertion loss of the DUT, IL
DUT
:
IL
DUT
10–
E
il
E
Meas
---------------log=
(18)