Measuring The Reflections From The Dut; Measuring The Power Transmitted Through The Dut - Agilent Technologies 8163A User Manual

A Background to Return Loss Measurement with the HP 81534A
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave
Multichannel System, Fourth Edition
Front Panel Delta" on page 149 and to calculate the insertion loss, see
"Calculating the Insertion Loss of the DUT" on page 151.
P
src
Figure 103 Measuring the Power Transmitted Through the Measurement Cable

Measuring the Reflections from the DUT

Now detach the measurement cable from the Power Meter and attach it to the
DUT. The DUT should be terminated.
P
src
P
DUT
Figure 104 Measuring the Reflections from the Device Under Test
The instrument measures the power reflected from the DUT. This power is called
P .
DUT
Measuring the Power Transmitted
Through the DUT
Unterminate the DUT and connect the DUT to a Power Meter so that the power
that is transmitted through the DUT can be measured. This power is called E
P
src
P
DUT
Figure 105 Measuring the Reflections from the Device Under Test
You can use E
of the DUT" on page 151.
HP 81534A
Measurement
Cable
HP 81534A
Reflection-free
Termination
Measurement
Cable
HP 81534A
Measurement
Cable
to calculate the insertion loss, see "Calculating the Insertion Loss
il
Return Loss Measurement
Power
E
Meas
Meter
DUT
DUT
Power
E
il
Meter
Reflectivity
R
DUT
.
il
147