ct3 week 1 Flashcards
Refers to a technology that allows the fast transfer of digital information in two directions
Broadband
For an accessible bonding pont, place house attachments near this
Electrical Service/Meter
The leading standard for cable modems.
DOCSIS
DOCSIS
Data Over Cable Service Interface Specification
Impairments inside or outside of the home can be identified by using this
Signal level meter
A safety code written and administered by the National Fire Protection Association.
National Electrical Code (NEC)
NEC
National Electrical Code
Equalizing the potential between Comcast’s service and other utility services present at the home is called what
Bonding
What process limits the potentially lethal voltages that may be present in the cable from external sources, such as electric power lines or lightning strikes
Bonding
The amplitude of TV carrier’s voltage, measured across 75 ohms, usually expressed in dBmV.
Signal level
a connection to earth or some conducting body that serves in place of the earth, and can be intentional or accidental.
Ground
The resistance of a circuit to alternating current
Impedance
This is the interconnection of different ground conductors
Bond
A device equipped with an F-81 splice connector used to connect the bond to the coaxial cable at the customer’s premises.
Bond Block
Wire gauge used for bonding series 6 drops
AWG-12
Wire gauge used for bonding series 11 drops
AWG-10
A clamp used to provide a connection between two ground wires.
Split Bolt
This type of clamp is designed to bond bare copper ground wire to a galvanized or copper pipe or conduit.
Pipe Strap
Wire gauge used for bonding with pipe straps
AWG 6
A copper-clad metal rod, 8 feet in length and 5/8” in diameter, driven into the ground, to which the ground wire is attached
Ground Rod
What are the dimension for the ground rod?
8 feet in length and 5/8 inch diameter
NEC article: General requirements for grounding
Article 250
NEC article: communication circuits
Article 800
NEC article: Coaxial cable distribution systems
Article 820
The length of ground wire must not exceed this length
20 feet and shorter than the shortest outlet
Existing bond blocks and enclosures should be a minimum of this height
18 inches
Bond blocks must be at least this distance from the power meter
12 inches
if the power service equipment is within this distance of the mobile home, the drop bonding options used for fixed dwellings should be followed.
9 meters / 30 feet
if there is no electrical service within 30 feet of the mobile home, the preferred method of bonding is here:
The metal I-beam
Bonding to the tap is permissible if the tap and power pedestal are within this distance of the home:
30 feet
Pay-per-view events were available via two way communication starting in this year:
1974
what year did Reception of programming by satellite (HBO) start?
1975
What decade did Laser transmitters, receivers, and fiber optic cable began to replace the hard line coax cable between the source and the neighborhood distribution systems.
1980’s
What decade did Wavelength division multiplexing (WDM) allowing parallel data paths on the same fiber
1980’s
What year was internet access and telephony over cable legalized by the U.S. government?
1996
What year was Out-of-the-home television viewing over the Internet and on mobile devices released
2007
What year was Multi-screen viewing made possible?
2012
What year was Comcast founded?
1963
What year was the FCC established?
1934
Where was Comcast’s first system built?
Tupelo Mississippi
FCC
Federal Communications Commission
This agency was established in 1934 to regulate electronic communications
Federal Communications Commission (FCC)
a resource that technicians can connect customers with to perform services on customer equipment and devices beyond the Comcast point of demarcation.
Hellotech
What is the first component of the Comcast Network
The Headend
This network structure responsible for receiving and processing signals and then sending those signals over the Comcast network to customers
The Headend
This network structure also transmits and receives voice packets on Comcast’s own managed nationwide network
The Headend
Collects signals from a variety of sources, such as satellite feeds, and directs them to headend.
Dry Creek Road Facility (DCRF)
DCRF
Dry Creek Road Facility
What are the 4 systems that make up the comcast network
Headend, Transportation, Distribution, and Drop
This system routes the signal between the headend and the node
Transportation System
What are the 4 advantages of fiber optic cable?
Low signal loss, Greater bandwidth, Increased security, and flexibility/durability
HFC
Hybrid Fiber Coax
This architecture uses both fiber optic cables and coaxial cables to transport signals between the headend and equipment in the customer’s home.
Hybrid Fiber Coax (HFC)
This transforms light energy from optical cable to RF or electrical energy on the coaxial output.
The Node
Transports modulated light between the fiber node and the headend.
Fiber Optic Link
What do you call a device that requires power to operate
Active Device
What do you call a device that does not require power to operate?
Passive Device
Provides the conversion from the fiber optic cable (Transportation) to the coaxial cable (Distribution). It converts RF to optical as well in the return signal:
Fiber Node
This device, which is connected to the coax cable uses special lenses to focus light into the fiber optic cable
Laser/Optical Transmitter
What are the 4 components of the Distribution System
Amplifiers, Coax Hardline Cable, Power Supplies, Taps
This system carries signals to and from the node through the hard line coaxial cable to communities for connection
Distribution System
Used in the coaxial parts of networks to boost signals
Amplifier
This branch of the distribution system that carries both downstream and upstream signals
Coax hardline
What power level is used for the hardline coax cable in the distribution system ?
60 - 90 vac
On the comcast network, these are examples of active devices:
Amplifier, power supply, node
Installed in the feeder lines, this provide a connection point for our customer’s drop to the hardline coaxial cable
Tap
CPE
Customer Premise Equipment
This system starts at the tap and terminates at the customer premises equipment (cpe)
Drop system
Name at least 3 components of drop system
Drop cable, F connectors, bond block, house amplifiers, splitter, cpe
This Connects devices in the customer’s home or business to the distribution:
Drop cable
This passive device is used to connect multiple outlets in the home:
Splitter
Mechanical device fitted onto the coax to allow connection to the tap:
F-Connector
This provides means to bond drop cable to the house electrode system:
Bond Block
These active devices are used to offset losses of long drops and splitters within the drop system:
House amplifier
These two pieces of hardware may be installed in the drop system for signal security:
Trap/filter, security sleeve/shield
This NPS score is considered excellent:
50
These are attached at the tap or in the house to prevent reception of certain frequencies:
Trap/Filter
These are attached to the drop at the tap to protect and ensure that it will not be removed by an unauthorized person:
Security Sleeves/Shields
These are used to hold cable to vinyl siding:
Horizontal/Vertical Siding Clip
These are used to hold cable to aluminum or steel siding
Plastic Siding Clip
These provide signal to the customer’s individual component outlets:
Interior Coaxial Cable
Used to secure ground wires and cable to either wood or masonry surfaces with self-tapping screws.
Screw In Clip
These are Used for binding several cables together:
Cable Ties
These are Used for anchoring in concrete, block, or brick:
Lead Anchor
These are used for hollow or solid wall applications to fasten light or medium weight fixtures:
Plastic Anchor
These high impact and plastic steel nails can attach to wood, plaster, concrete, brick.
Roka Clip
Horizontal clips should be spaced this far apart
18-24 inches
Vertical clips should be spaced this far apart
30-36 inches
This is the entry direction for drilling into brick
Outside to in
When drilling into a brick home, what part of the brick should you drill into:
The Mortar
Beware of asbestos when drilling into this type of siding:
Shingles
When attaching cable to shingles or aluminum siding horizontally, run the cable here:
The Shadow Line
Drilling into these sidings require written consent from the customer
Aluminum and Vinyl Siding
In most homes, the majority of water pipes run through one section also called this:
Wet Wall
Install outlets several feet away from these three obstacles in house structures:
Doors, Windows, and fireplaces
Minimum distance an outlet can be installed from the electrical outlet
6 inches
What are the two types of cable routing:
Home Run and Loop-Through
Any cable that runs from the origination point to an outlet, then to the next outlet and so on, is considered this type of cable routing
Loop-Through
Any cable routed from the origination point to an outlet, with no equipment in between, is considered this type of cable routing
Home Run
Comcast prefered method of routing cables:
Home Run
All new outlets made in a home must be run to this location
The service distribution point
A drop cable routed through a finished or partially finished basement must be routed parallel or perpendicular to these:
Floor Joists
A drop cable routed through a finished or partially finished basement must never be attached in these 2 locations:
Bottom of the floor/ceiling joists and through joists holes occupied by electrical wires
Coax jumpers for power supplies should not exceed what length?
200 feet
Only use this as a last resort after determining that a passive splitting configuration will not support the minimum specified outlet RF signal levels for each of the required outlets in the home.
RF signal amplification via house amplifier
What location must house amplifiers be installed at?
The service distribution point
What is the only type of exterior where drilling from inside to outside is allowed
Wood
What size hole should be drilled for running cable?
3/8 inch
What is the maximum hole size allowed for running cable?
3/4 inch
This is the minimum distance between holes when running cable:
1.5 inches
If drilling from inside to out on brick, This could happen to the brick:
The brick may explode or “blow out”
What slope should be used when drilling into a home from the outside
5 degree upward slope
If cables are packed too tightly when routing through a hole, they exhibit what type of damage even if no physical damage is apparent:
Electrically damaged
When drilling through a floor joist, do not drill through this section:
The middle third
Drop cable routed through a finished or partially finished basement perpendicularly to laminated veneer lumber joists must only be routed through holes drilled here
The middle third
Use this on the cable before going through any siding:
Entry Bushing
Studs are normally centered apart by these 2 distances:
16 or 24 inches
Components of coax cable
Center conductor, dielectric, braid/shield, jacket
This component of coaxial cable carries video, voice, and data signals between network devices
Center Conductor
Substance that allows heat or electricity to pass along or threw it
Conductor
The characteristic of RF propagation in a cable in which the higher frequencies tend to travel along the surface of the conductor rather than throughout its mass?
Skin effect
This is the insulating material separating two conductors, such as that between the center conductor and sheath in a coaxial cable.:
Dielectric
What is the most common dielectric material:
Polyethylene Foam
Aluminum foil / braiding that prevents signal ingress and egress. Serves as a return conductor for ground current
Shielding
This is the passage of signal, intended to remain within the cable, to the outside world
Egress
This is the passage of an outside signal into the cable plant:
Ingress
This component of coaxial protects the cable from outside damage
Outer Jacket
The outer jacket for underground drop cables is made out of what material:
Polyethylene
The outer jacket used for air plenum or duct applications is made of what material:
Teflon
This type of cable is jacketed with a fire-retardant plastic jacket:
Plenum
This is the outer jacket material used for drop cables:
PVC
What material is used for the shielding of hardline cable:
Solid Aluminum Tube
What material is used for the shielding of drop cable:
Aluminum foil/braid
A cable splitter (overhead or underground) which branches off a main line or feeder of the distribution system:
Tap
This type of cable may be found in older installations:
Series 59
This type of cable is used in most newer single-home installations:
Series 6
This type of cable is used in single-family homes with long drops
Series 7
This type of cable is used for long drops
Series 11
This type of cable is used in multi-dwelling installations and long drops
QR320
This type of cable is equipped with a support wire
Aerial/Messenger Cable
What material is the messenger on aerial cable made of
Galvanized Steel
Attached to the coax cable, this is used for support to reduce sagging and stretching of the coax cable
Messenger
This type of cable includes a gel-like flooding compound inserted between the cable jacket and outer shielding
Underground Cable
The weight of a reel of series 6 aerial cable
45 lbs
The weight of a reel of series 11 aerial cable
88 lbs
Type of cable Limited to installation within buildings, in raceways, or in open spaces in which the exposed length of cable does not exceed 10 feet
CATVX
Type of cable for general use
CATV
Riser cable for vertical runs in a shaft or floor-to-floor in multiple-use dwellings
CATVR
Plenum cable for use in environmental air spaces such as ducts or plenums
CATVP
All cables used for RF signal distribution shall meet the minimum physical and electrical requirements of this standard
ANSI/SCTE 74