User`s guide

Getting Started with Return Loss A Background to Return Loss Measurement
38 Agilent 81610A/11A/12A/13A/14A Return Loss Module, Fifth Edition
Measuring the Power Transmitted Through
the Measurement Patchcord
Connect the measurement patch cord (the cable you will use to
connect to the Device Under Test, DUT) directly to a Power Meter and
measure the transmitted power, E
Meas
. You can use E
Meas
to calculate
the front panel delta, see “Calculating the Front Panel Delta” on
page 41 and to calculate the insertion loss, see “Calculating the
Insertion Loss of the DUT” on page 43.
Figure 32 Measuring the Power transmitted through the Measurement Patchcord
Measuring the Reflections from the DUT
Now detach the measurement patchcord from the Power Meter and
attach it to the DUT. The DUT should be terminated.
Figure 33 Measuring the Reflections from the Device Under Test
The instrument measures the power reflected from the DUT. This
power is called P
DUT
.
Power Meter
E
Meas
M
ref
P
ref
Agilent 81610A
Reflection Reference
measurement patchcord
M
dut
P
dut
DUT
Agilent 81610A
Reflection-free
Termination
measurement
patchcord