5
Insertion Loss Testing Overview
Figure 2
Single Ended Method
continued
• The test launch jumper is disconnected from the detector and con-
nected to connector end “X” of the device under test via a splice
bushing. Connector end “Y” of the device under test is connected
to the detector. See Figure 2. The detector displays dB loss which
represents optical power loss at the “X” connection (due to mis-
alignment, concentricity, angularity, etc.) plus the loss due to attenu-
ation through the length of fiber in the device under test.
