Calibration Measurements Return Loss Measurement
Agilent 8163A/B, 8164A/B, and 8166A/B User’s Guide, Fourth Edition 153
Agilent 81613A and Agilent 81614A
Return Loss modules
Agilent 81613A and Agilent 81614A Return Loss modules include a
power sensor, monitor diode, three couplers, and two internal laser
source in one module. They are for use in the Agilent 8163B Lightwave
Multimeter, the Agilent 8164A/B Lightwave Measurement System, and
the Agilent 8166A/B Lightwave Multichannel System for making
return loss measurements.
Figure 86 The Contents of the Agilent 81613A and Agilent 81614A Return Loss modules
All Agilent 8161x series Return Loss modules include an input for an
external laser source.
Calibration Measurements
Before measuring the reflection factor of a device under test (DUT), it
is important to take calibration measurements as described in
“Calibrating the Return Loss Module” on page 157. These calibrations
eliminate wavelength dependencies, coupler directivity, insertion
losses, backscattering and other non-ideal characteristics of the
system.
M
dut
P
dut
External Laser
Source
Output 9/125 µm
Internal Laser
Sources
physical contact
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