OTDR

Which wavelength, 850 or 1550, would be more affected by bending?

1550; the longer wavelength (lower frequency) gets more attenuated

the power of a fresnel reflection is how many times higher than (normal) backscatter

40,000 times (causes blind spot)

The minimum detectable distance between two fresnel reflections is called the:

Event Dead Zone

A typical OTDR can measure both single mode and multimode cable simultaneously (T/F)?

False; u must use different modules

A crappy connection will give a higher/lower reflectance reading

Lower.(This is 'return loss')

________ __________ is the major cause of attenuation in fiber

Rayleigh Scattering

A ghost reflection might be caused by an overpolished connector (T,F)

True: there is an air gap in the connector pair at the original event

Loss measurements are always made from what to what portions of the trace

backscatter to backscatter

The Event Dead Zone is always longer/shorted than the Attenuation Dead Zone

event is shorter

When light encounters a different density medium, a___________ _________ occurs

fresnel reflection

When expressing the 'dynamic range' of an OTDR, a higher number (dB's) means /longer/shorter fiber length capability

higher range= longer

The five parts of an OTDR are:

laser, coupler/splitter, optical sensor,controller, display

1550 nm light has greater/lesser attenuation than light at 850 nm

lesser

The LSA method is used for measuring:

point loss

What determines the length of a blind spot?

pulse width

________pulse to test short;_______pulse to test long

short;long

The number of measurements(data points) per kilometer is called the:

spatial resolution

a coupler/sensor has how many ports?

three; laser source, fiber under test out, fiber under test back

A ghost reflection will indicate how much of a loss (typically)

zero loss

If a new fiber with a different IOR is encountered at a splice, a "_______ ______" may be indicated

"Gain Splice"