NCTI INSTALLER QUESTIONS AND ANSWERS
Distribution amplifiers
strengthen signals as they move further away from the headend through the trunk
express system?
carrier wave
A wave with a much higher frequency than the input signal
W
symbol for power
Sampling
the process of measuring an analog signal at a specific interval
the base 10 system
Digits 0 through 9 are used
6:1
the following compression rates will enable six digital programs to be transmitted rather
than one analog channel in a 6 MHz bandwidth
32dB or greater*
what modulation error ration (MER) should a 256-quadrature amplitude Modulation
(QAM) signal operate?
post bit-error-rate (BER)
A measurement of all bit error after forward error correction has been applied.*
modulation
The reshaping of a carrier wave to include information contained by an input signal
Time division multiple access (TDMA)
the name of the technique that allows the signals to be send without losing data integrity
, the purpose of the shielding
Prevent ingress and egress
attenuation
A reduction in signal strength through a cable system
feature of multimode fiber
It is easier to handle and terminate than single-mode fiber
structure of fiber-optic cable
Self-supporting aerial fiber cable requires grounding or bonding if it contains metal
true about CAT-1 cabling
It is typically used in voice applications
CAT-5e
twisted-pair cable types is the current standard for household data and voice wiring
Number of the twists
responsible for reducing crosstalk in twisted-pair cable
Wireless networks use low-power RF signals;therefore, which of the following is true
about signal strength?
The greater the distance between wireless devices the lower the signal strength and
data rate.
Which of the following is true about Wi-Fi Technology
The connection between the router and modem is always wired
What percentage does a cables attenuation increase or decrease for every 10 degree
change in temperature?
1%
a characteristic of high definition television (HDTV)
Audio surround sound using Dolby Digital technology
Distribution amplifiers
strengthen signals as they move further away from the headend through the trunk
express system?
carrier wave
A wave with a much higher frequency than the input signal
W
symbol for power
Sampling
the process of measuring an analog signal at a specific interval
the base 10 system
Digits 0 through 9 are used
6:1
the following compression rates will enable six digital programs to be transmitted rather
than one analog channel in a 6 MHz bandwidth
32dB or greater*
what modulation error ration (MER) should a 256-quadrature amplitude Modulation
(QAM) signal operate?
post bit-error-rate (BER)
A measurement of all bit error after forward error correction has been applied.*
modulation
The reshaping of a carrier wave to include information contained by an input signal
Time division multiple access (TDMA)
the name of the technique that allows the signals to be send without losing data integrity
, the purpose of the shielding
Prevent ingress and egress
attenuation
A reduction in signal strength through a cable system
feature of multimode fiber
It is easier to handle and terminate than single-mode fiber
structure of fiber-optic cable
Self-supporting aerial fiber cable requires grounding or bonding if it contains metal
true about CAT-1 cabling
It is typically used in voice applications
CAT-5e
twisted-pair cable types is the current standard for household data and voice wiring
Number of the twists
responsible for reducing crosstalk in twisted-pair cable
Wireless networks use low-power RF signals;therefore, which of the following is true
about signal strength?
The greater the distance between wireless devices the lower the signal strength and
data rate.
Which of the following is true about Wi-Fi Technology
The connection between the router and modem is always wired
What percentage does a cables attenuation increase or decrease for every 10 degree
change in temperature?
1%
a characteristic of high definition television (HDTV)
Audio surround sound using Dolby Digital technology
