Random
Cable 101
MATH
MT
cable 201
100
Immediately upon parking your vehicle, approximately how far, in feet, should cones be placed in front of and behind your vehicle on the active traffic side to help create a "Circle of Safety"?
Two
100
Each National TV Standards Committee (NTSC) channel requires how much bandwidth?
6 MHz
100
A hardline coaxial cable has 1.4 Ω resistance and 3.5 A is flowing through it. How much voltage should be dropped by the cable?
4.9 V
100
In which area/portion of the HFC plant is the Fiber Optic Node located?
Headend
Optical Origination Optical Distribution Passive Feeder
Optical Distro
100
Which of the following is a common type of fiber used in CATV?
Single Mode
200
The receiver in the optical ___________ has a power level test point that allows a DC voltmeter to be used for testing optical input power.
Node
200
Which government agency is responsible for regulating and assigning frequencies throughout the United States?
FCC
200
If V = 10 volts and I = 20 amps, what does R equal?
200 Ohms
200
What is the name of the network segment that may cover a distance of up to 40 miles and is responsible for providing service to 10,000 or more subscribers?
Optical Transport
Coaxial Distribution
Hub to Node
Coaxial Express
Optical Transport
200
What does the term cascade refer to?
Amps in line with one another.
300
Manufacturers often have bolt tightening sequence numbers cast into the node's housing but what should you do if these numbers are not present for the model you're dealing with?
Refer to the vendor documentation.
300
Which of the following is the typical bandwidth for an HFC network? (NOTE: Your local system may differ)
5 - 1000 MHz
300
What unit is used for an absolute voltage measurement that indicates RF signal strength?
dBmV
300
Which of the following servers dynamically assigns IP addresses to modems and other devices?
DHCP DNS TFTP NTP
DHCP
300
What device could be used after a long feeder run to minimize tilt?
EQ
(In - Line EQ)
400
True or False: In most nodes, the test point reading is 20 dBmV (or 30 dBmV) less than the actual reading.
True.
400
The ______________________ system decreases the effective data rate but increases the reliability of QAM carriers.
FEC
400
Select the coaxial cable with the highest DC loop resistance per 1000 feet.
RG-11 500P3 625P3 750P3
RG-11
400
What device connects the power supply output to the hardline system?
SPI
400
Which of the following devices secures connectors to ensure contact at a housing?
Seizure Screw
500
625 P3 has a published DC loop resistance of 1.1Ω per 1000’. What is the total DC loop resistance for 885 feet of it?
1 ohm
500
What needs to be installed at an amplifier in order to provide an AC input to the DC power pack?
Shunt
500
Channel 61 is measured at a -20 dB test point. The signal strength shown on the meter is 2 dBmV. What is the actual level of channel 61 at the input to the test point?
22 dBmV
500
A characteristic impedance of greater than 75Ω will result in a ___________?
mismatch that may cause reflections.
500
Which term describes signal loss that occurs between one output port and another output port?
Port to Port Isolation.