NCTI FIBER TESTING &
MAINTENANCE QUESTIONS AND
THEIR CORRECT EXPECTED ANSWERS
What type of interface is common on new-generation
optical meters?
USB
Optical power meters used for testing FTTx
installations operating downstream from the headend
should be calibrated for which
wavelengths?
1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical
power meter, and an optical talk set, what else do
optical loss test sets include in their combined
features?
An ORL meter
What do most optical power meters require when
measuring transmit and receive power?
Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end
attenuation using the optical power meter?
The light source and optical power meter must be
referenced together before taking measurements
What do most models of laser light sources use as
operational status indicators?
, Controls for turning the light source on and off, selecting
the laser wavelength for testing, and selecting the
modulation signals; display indicators for the selected
wavelength, mode of operation, battery status, and power
source.
What occurs when a laser light source is used with an
optical fiber identifier to test fibers?
A 2-kHz modulation provides a test signal allowing the
fiber under test to be detected by the optical fiber
identifier.
Besides determining whether the light is on fiber and
the light is modulated and carrying traffic, what does
is the third function the optical fiber identifiers
determine?
The direction from which the light is coming.
Which of the following statements is accurate
regarding laser light source specifications?
Standard environmental specifications for laser light
sources range from 13°F to 130°F for operating
temperatures and - 19°F to 158°F for storage
temperatures.
What visually represents the optical fiber's attenuation
characteristics and the OTDR setup?
The waveform
What are the most common single-mode wavelengths
used by OTDR?
1310 and 1550
Which class of optical transmitters is the safest for
the human eye?
Class 1
What is unique to a fiber break locator?
MAINTENANCE QUESTIONS AND
THEIR CORRECT EXPECTED ANSWERS
What type of interface is common on new-generation
optical meters?
USB
Optical power meters used for testing FTTx
installations operating downstream from the headend
should be calibrated for which
wavelengths?
1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical
power meter, and an optical talk set, what else do
optical loss test sets include in their combined
features?
An ORL meter
What do most optical power meters require when
measuring transmit and receive power?
Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end
attenuation using the optical power meter?
The light source and optical power meter must be
referenced together before taking measurements
What do most models of laser light sources use as
operational status indicators?
, Controls for turning the light source on and off, selecting
the laser wavelength for testing, and selecting the
modulation signals; display indicators for the selected
wavelength, mode of operation, battery status, and power
source.
What occurs when a laser light source is used with an
optical fiber identifier to test fibers?
A 2-kHz modulation provides a test signal allowing the
fiber under test to be detected by the optical fiber
identifier.
Besides determining whether the light is on fiber and
the light is modulated and carrying traffic, what does
is the third function the optical fiber identifiers
determine?
The direction from which the light is coming.
Which of the following statements is accurate
regarding laser light source specifications?
Standard environmental specifications for laser light
sources range from 13°F to 130°F for operating
temperatures and - 19°F to 158°F for storage
temperatures.
What visually represents the optical fiber's attenuation
characteristics and the OTDR setup?
The waveform
What are the most common single-mode wavelengths
used by OTDR?
1310 and 1550
Which class of optical transmitters is the safest for
the human eye?
Class 1
What is unique to a fiber break locator?
