YOKOGAWA AQ7260 OTDR, User Manual, Page: 438 / 442

Chapter 10 APPENDIX
10-11
Far end
The end of an optical fiber cable and its surrounding area
If the end of the optical fiber cable cannot be detected due to noise, “far end” indicates the
cross point of the noise and optical fiber and its surrounding area.
For details on far end, refer to page 1-40.
Fault location
Points where the optical fiber is cut or the end of the optical fiber.
Filter
Used to eliminate noise from the trace displayed at the end of average measurement.
For details on filter, refer to page 3-59.
Format
Data on a storage medium like floppy disk cannot be read unless it is saved in the format
appropriate for the instrument. “Format” means to convert such data to the appropriate
format.
Fresnel reflection
Reflection that occurs at points (glass/air interface points), such as the end of the optical
fiber or points where the optical fiber is cut, where the group index changes when a light
enters the optical fiber. If the fiber is cut at right angles to the fiber axis, approximately 3%
(
−
14.7 dB) of the incident optical power will be reflected.
Refer
Refer