Measuring The Power Transmitted Through The Measurement Patchcord; Measuring The Reflections From The Dut; Figure 114 Measuring The Power Transmitted Through The Measurement; Figure 115 Measuring The Reflections From The Device Under Test - Agilent Technologies 8163A Manual

A Background to Return Loss Measurement
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
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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
delta, see "Calculating the Front Panel Delta" on page 195 and to calculate
the insertion loss, see "Calculating the Insertion Loss of the DUT" on
page 196.
Agilent 81610A
P
ref
Figure 114 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.
Agilent 81610A
P
dut

Figure 115 Measuring the Reflections from the Device Under Test

The instrument measures the power reflected from the DUT. This power is
called P .
DUT
. You can use E
Meas Meas
M
ref
measurement patchcord
M
dut
measurement

patchcord

Return Loss Measurement
to calculate the front panel
Reflection Reference
Power Meter
E
Meas
DUT
Reflection-free
Termination
191