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Return Loss Measurement Getting Started With Return Loss
166
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
Equipment required
Return Loss and Insertion Loss can be measured in several ways. The
method used by the Agilent 8161x series Return Loss modules requires the
following equipment:
• An Agilent 81610A Return Loss module (where an internal source is not
present), or an Agilent 81611A, 81612A or 81613A Return Loss module (where
an internal source is present).
• If the Return Loss module does not include an internal source, or you choose to
use an external source, a Laser Source module.
• A Power Meter.
A typical setup, using an Agilent 81610A Return Loss module, where the
DUT is a connector pair, is described in Figure 84 .
Figure 84 Measuring Return Loss and Insertion Loss
To measure insertion loss you measure the power transmitted through the
DUT, see “
How to Measure Return Loss ” on page 184
If you are using an 81534A Return Loss Module, it is important that the
Laser Source has a stable output. Agilent 8161x Return Loss modules
include a monitor diode to compensate for power variation in the Laser
Source.
N O T E
M
il
DUT
Power Meter
E
il
Agilent 81610A
Reflectivity
R
DUT
External Laser
Source
patchcord
physical contact
Agilent 81113PC