Current/ amperage - correct answer Flow or movement of electric charges
Resistor - correct answer a passive two-terminal material that impedes the flow
... [Show More] of current
What is the most common workplace hazard involving electricity? - correct answer Electrical shocks
What is minimum approach distance? - correct answer The shortest safe distance to keep from energized conductors
CATV at the pole - correct answer40''
CATV at the mid-span - correct answer24''
CATV at the house - correct answer12''
Live parts of electric equipment must be guarded against at how many volts? - correct answer50 volts
What are the 2 kinds of grounds required by Safety standards for electrical systems? - correct answer Service and Equipment
What are circuit protection devices designed to do? - correct answer Automatically limit or shift off the flow of electricity in the event of a ground fault, overload, or short circuit in the wiring system
OSHA - correct answer Occupational Safety and Health Administration
CATV - correct answer Community Antenna Television
HFC - correct answer Hybrid Fiber Coax
What are the four sources of signals? - correct answer Satellite, local origination, off air, fiber optics
Forward - correct answer54 MHz-1 GHz
G.B. - correct answer Guard Band
Return - correct answer5-42 MHz
Downstream (forward path) - correct answer Forward signal from the head end to a customer
Upstream (reverse path) - correct answer Return signal from a customer to the head end
Signal frequency - correct answer Number of times that an RF signal completes a cycle from a positive value to a negative value and back in one second
Ultrasonic frequencies are higher than what? - correct answer Audio
Infrasonic frequencies are below what? - correct answer Audio
How many hertz can the human ear hear? - correct answer20-20,000
Per NTSC requirements, what is a tv channels bandwidth? - correct answer6MHz
FCC (Federal Communications Commission) - correct answer Gov agency responsible or regulating and assigning frequencies throughout the US
HFC distributes what? - correct answer Broadband signals through a network of various elements
Nodes - correct answer Convert the light signals from the head end into radio frequency signals for delivery to customer
Ingress signal leakage TV: - correct answer Lines in picture, ghosting, pay per view problems, scrambling problems
Ingress signal leakage Internet: - correct answer Lack of internet access, lack of internet access, lack of email services, data problems
Ingress signal leakage Voice - correct answer Telephone call failures (incoming and out coming)
QAM (quadrature amplitude modulation) - correct answer Is both an analog and digital modulation scheme used for transmitting digital data as an analog signal by using a carrier split into 2 carriers of identical frequency phase shifted 90 degrees apart
How many programming channels can digital signals have within a 6 MHz space? - correct answer12
CLI - correct answer Cumulative Leakage Index
What are charters technical standard for 256 QAM and OFDM carries at CPE? - correct answer34 dB or better
BER - correct answer bit error rate
Post BER - correct answer1.0e-9
Pre BER - correct answer1.0e-6
FEC - correct answer Forward Error Correction
SLM - correct answer Signal Level Meter
CNR - correct answer Carrier to Noise Ratio
Hum Modulation - correct answer The amplitude distortion of broadband cable video and audio carriers by 60 Hz or 120 Hz voltage
What are the two types of hum modulation? - correct answer Video and audio
Digital= - correct answer Rate data bitstream
Analog= - correct answer Concentrated at a single frequency
How much bandwidth is required to transmit digital signal data? - correct answer6 MHz
The wider the digital signal the more? - correct answer Power
Higher BER can be caused by? - correct answer Ingress
Distortion
Noise
Interference
Hum
Reflection
Spaced errors - correct answer Errors that are spread out because of noise
Burst errors - correct answer Errors that are grouped together because of intermittent problems such as ingress or loose connectors
FEC - correct answer Generates and introduces additional bits as data is transmitted
Uncorrectable FEC errors are caused by: - correct answer Impulsive noise or ingress interference
Loose or intermittent connections
A faulty modem
MER - correct answer A measurement used to quantify the performance of communications system transmitting a digital signal
Industry acceptable MER values for QPSK - correct answer~24dB
Industry acceptable MER values for 64-QAM - correct answer~27dB
Industry acceptable MER values for 256-QAM - correct answer~31dB
Voltage - correct answer Measurement of the force or pressure that electrons to move
1v equals what? - correct answer1 current of 1 ampere through a resistance of one ohm
Current are measured in what? - correct answer Amperes
Resistance - correct answer The opposition a material offers to the flow of current
Power - correct answer The rate at which work is done. Measured in watts
1 watt= what? - correct answer1V X 1AMP
ISA - correct answer Integrated Splitter Amplifiers
How many outlets are needed to use ISA? - correct answer4 OR more
Grounding - correct answer a conducting connection between an electric circuit or equipment and the earth or some other conducting body.
Bonding - correct answer The permanent joining of metallic ports to form an electrically conductive path that will ensure electrical continuity and the capacity to conduct safely any current likely to be imposed
What is the rg6 bond? - correct answer12
What is the rg11 bond? - correct answer6
What type of bond for mobile home trailer? - correct answer Mobile home trailer beam clamp [Show Less]