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- What are four Intrinsic Coupling Losses?
- numerial aperture
- core diameter mismatch
- concertricity loss
What are four Extrinsic Coupling Losses?
- end separation
- axial/lateral misalignment
- angular misalignment
- surface finish
What is scattering?
the partial deflection of light rays as they travel along the fiber core
What type of scattering is responsible for 90% of all attenuation?
What is the second leading cause of attenuation?
What is fiber dispersion?
is the speading of light pulses as they travel down the optical fiber
What type of dispersion effects both single mode fiber and multi-mode fiber?
What is the difference between a microbend and macrobend?
- microbends are microscopic imperfections caused by local mechanical damages and can't be seen by the human eye
- macrobends are large bends that can be seen by the human eye
What should be worn at all times when working with cable, fiber, and/or chemicals?
what is intrinsic coupling losses
are caused by inherent fiber characteristics
what are the three primary types of scattering
- stimulated brillouin
- stimulated raman
what does SRS stand for
stimulated raman scattering
what does SBS stand for
stimulated brillouin scattering
what are the different types of dispersion
- modal dispersion
- chromatic dispersion
- polarization mode dipersion
what does PMD stand for
polarization mode dispersion
what type of dispersion effects single mode fiber
polarization mode dispersion PMD
what type of dispersion effects multi-mode fiber
What are the three types of fiber optic test cables needed to test for serviceability?
- ST-ST fiber optic test cables
- LC-ST fiber optic test cables
- LC-LC fiber optic test cables
What does FOM stand for?
fiber optic meter
What does the DSP-FOM?
is an optical power loss meter that provides fiber testing capabilities for the fluke etherscope series II network assistant
What source type is used by the DSP-FOS?
fiber optic light emitting diode power source
What type of optical adapter is used with the DSP-FOS?
What emitter type does the Fluke LS-1310/1550 Optical Light Source use?
What are the output wavelengths of the Fluke LS-1310/1550 Optical Light Source?
- 1310 nm +- 20nm
- 1550 nm +- 30nm
What are the two pulse duration settings of the Fluke LS-1310/1550 Optical Light Source?
- continuous wave CW
- modulating wave MOD
What type of cable is used to connect the DSP-FOM to the Fluke EtherScope?
known good Cat 5e
What is used to connect the two fiber optic test cables together during a serviceability test?
What is the dB loss limit set to?
what does CW stand for
what does MOD stand for
what does FOS stand for
fiber optic source
What fiber optic source is used to test ST-ST Single-Mode multiple strand fiber optic cable?
FLUke 1310/1500 fiber optic source
What is used to connect the two fiber optic test cables?
What is the Loss Budget set to on the Fluke EtherScope Series II Network Assistant when testing fiber optic cable?
When is the wavelength used to measure a Single-Mode LC-LC fiber optic cable?
when you turn on the DSP-FOM
What does OTDR stand for?
optical time domain reflectometer
How does an OTDR measure for loss?
an instrument that analyzes the light loss in an optical fiber
What can an OTDR be used determine within a fiber optic network?
the location of the errors
What type of screen do OTDR’s use to display test results?
What is a Dead Zone?
exceptionally high signal reading for the initial 1 to 10 meters of the fiber optic cable
What is an End of Fiber Spike?
exceptionally high signal reading caused by light reflecting off the mirror-like polished end of the optical fiber
What is the Ghost?
- often called a phantom signal
- a faint, second image of a stronger, preceding signal caused by reflection
What is noise?
- referred to as the noise floor
- continuation of an OTDR measurement that results in an OSNR level so low, the unit cannot determine if there is more optical cable present
What does VFL stand for?
- visual fault locator
What is the purpose of the Fluke Visifault?
is a visible light source that helps trace optical fibers, check fibers continuity, and find faults such as breaks, bad splices, and tight bends in fiber optic cable
What class of laser does the Fluke Visifault utilize?
class 2 laseer
What type(s) of fiber is the Fluke Visifault used with?
When the Fluke Visifault locator is not in use, what safety precaution is taken?
cover the VFL's output with the dust cap
What type of connectors does Fluke Visifault’s universal fiber adapter accept?
2.5mm ferrules (SC ST FC)
what are the four things on the VFL
- VFL's output
- power button
- flash key
- status LED
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