YOKOGAWA AQ7260 OTDR, User Manual, Page: 442 / 442

Chapter 10 APPENDIX
10-15
Secondary reflection
If a large reflection occurs, the reflection of the point may return again and makes an event
look as if it were present in places where it is actually not.
For details on secondary reflection, refer to page 2-12.
Spatial resolution
Also called event dead zone. Refer to the explanation given for “Event dead zone”.
Splice loss
Loss that occurs at fused points.
For details on splice loss, refer to page 1-41.
Two Point Approximate (TPA)
Two point approximate is the method by which a loss measured between two points.
Since this method uses the level difference of the two point.
For details on two point approximate, refer to page 3-38.
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