182 8163A/B, 8164A/B, 8166A/B User’s Guide
7 Return Loss Measurement
81613A Return Loss modules
81613A 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 8163B Lightwave Multimeter, the 8164A/B Lightwave Measurement
System, and the 8166A/B Lightwave Multichannel System for making
return loss measurements.
Figure 101 The Contents of the 81613A Return Loss modules
All 8161x series Return Loss modules include an input for an external laser
source.
M
dut
P
dut
External Laser
Source
Output 9/125 mm
Internal Laser
Sources
physical contact