What does CLI stand for.

a. Cumulative level Index

b. Cumulative Leakage Index

c. Common level Index

d. Communications Link Index

CLI figure of Merit per the FCC

is

a. 62 or more

b. 64 or more

c. 64 or less

d. 6 or less

64 or less

The FCC requires  CLI Logs to be held for how long.

a. 2 months

b. 36 months

c. 5 years

d. 2 years

Common Path Distortion

is a return path impairment that can have a severe effect on return path signal quality.

Anything greater than ___ will show up as a Beat in analog picture.

A. 30dB

B. -30dB

C. 30dBmV

D. -30dBmV

B. -30dB

FCC regulations regarding signal leakage are outlined in the Code of Federal Regulations.

a. Regulation tech. Manual 88.1, Part 76 Cable

b. Title 47, telecommunication, Part 77

c. FCC Manual 70, title 88

d. Title 47, Telecommunication, Part 76 cable TV Service

True/False

CLI Which is non-mathematical value derived for the number and severity of leaks in the cable system.

false

CLI Which is mathematical value derived for the number and severity of leaks in the cable system

CLI leakage test are conducted how often?

a. once every 12 months

b. once every 2 years

c. when aircraft can't navigate

d. four times a every year

a. once every 12 months (annually)

What is the Freq. differents between the video and the audio in a 6Mhz channel.

a. 4.2Mhz

b. 4.5Mhz

c. 4.5hz

d. 4.2hz

b. 4.5Mhz

Unwanted signals entering the network can create a number of ___ patterns on the TV screen. Can be cause by Ham radio and other broadcast AM carriers.

a. Glosting

b. Cross Modulations

c. Beats

d. all the above

c. Beats

With 100' of RG-6 Drop Cable what would the max. loss be (for test answer)?

A. 3db

B. 4db

C. 5db

D. 6db

D. 6db

Carrier-to-beat ratios greater than ____ are far enough below desired carrier level to be of little concern to the average viewer.

a. -57dB

b. 57dB

c. 30dB

d. -30dB

b. 57dB

What Modulation typically form a pattern of diagonal lines on analog video picture.

a. FM carriers

b. ghosting carriers

c. AM Carries

d. both a and b

What Modulation can cause audio problems.

a. AM Carrier

b. leading ghosting

c. FM Carrier

d. following ghost

c. FM Carrier

If you are checking a cust. drop for ingress with you meter. What would be a passing.

a. -55dBmV

b. -45dBmV

c. -35dBmV

d. -25dBmV

d. -25dBmV

The correct answer is -30dBmV but because -25dBmV is passing that the answer.

Appears when ingress allows a locally broadcast TV channel's signal to enter the TV along with the channel's signal supplied by the network.

a. leading ghost

b. following ghost

c. beats

d. Co-Channel interference

a. leading ghost

Is usually caused by a reflection the cable system caused by poor return loss at the relecting device and poor directivity at the tap or device feeding the set.

a. beats

b. co-channel interference

c. leading ghost

d. following ghost

While watching TV you see a leading Ghost. The Ghosting appears on what side. Enter into cable plant can be caused by damaged coax in the system.

a. top side

b. left side

c. right

d. you can't see the ghost

b. left side

While watching TV you see a following Ghost. The Ghosting appears on what side. Can be caused by a reflected signal.

a. left side

b. middle side

c. right side

d. top side

c. right side

You will not see a ghost whose level is more than _____ below  the desired  carrier.

a. 10 dB

b. 25 dB

c. 27.5 dB

d. 30 dB

d. 30 dB

A method of reception using an RF current of the proper magnitude and phase relation so the received voltage is of the same nature as the original wave.

a. co-channels interference

b. Zero Voltage

c. voltage equalizer

d. Zero Beat

d. Zero Beat

If there were no offset,, the two stations would be very close, but not exactly the same in frequency, causing what is called a _______?

a. Zero Beat

b. Offset bandwidth

c. Freq. off beat

d. Off Channel Zone

a. Zero Beat

What can cause return path interference?

a. Amateur Radio

b. electrical motor

c. ghosting

d. both a and b

d. both a and b

What is the return specturm?

a. 52Mhz to 133Mhz

b. channel 2, 3, and 4

c. 5hz to 42Mhz

d. 5Mhz to 42Mhz

Thermal Noise can be cause by one of the following.

a. Electrical engine

b. low signal

c. bad tap plate

d. CB radio

True / false

Voltage will not increases or decreases, producing more or less noise in a CATV system?

false

Voltage also increase or decreases, producing more or less noise.

In C/N, We know that at he input to this amplifier we have noise at a level of ____.

a. 59.2 dBmV

b. -59.2 dBmV

c. 30 dBmV

d. -30 dBmV

b. -59.2 dBmV

The 10 dB of  noise, which was added by the amplifier, is defined as the amplifier's _______.

a. thermal noise

b. noise figure "NF"

c. Carrier-To-Noise

d. NTSC

b. noise figure "NF"

Carries Comcast traffic from CRAN to CRAN. Comcast's Private Backbone.

A.VPN

B.Cbone

C.Internet Backbone

D.PAT

B.Cbone

Used to provide regions with access to national HSD peers & to global Internet access via one or more transit providers.

A.VPN

B.Internet

C.Internet Backbone

D.WAN

C.Internet Backbone

3 parts of Fiber Optic Cable:

A.Core, Fiber, Sheathing
B.Fiber, Core, Coating
C.Cladding, Center Conductor, Coating
D. Coating, Cladding, Core

D. Coating, Cladding, Core

What kind of cable would CATVR be?

a. residential cable

b. return cable

c. riser cable

d. high resistance cable

c. riser cable

What kind of cable is CATVP?

a. VIP cable

b. plenum

c. plum cable

d. residential

b. plenum

What kind of cable is CATV?

a. riser cable

b. residential cable

c. plenum cable

d. general purpose cable

d. general purpose cable

What kind of cable is CATVX?

a. general purpose

b. VIP cable

c. low lose cable

d. residential cable

d. residential cable

If you as installer, need to install a building with five floor in it. You need to come from the top floor and run the cable down a few floor down in the office you're installing to day. What kind of Cable do you need to use?

a. CATVX

b. CATVR

c. CATVP

d. any of the above will do

b. CATVR

If the input level (in dBmV) numerically equals an amplifier's NF, the output of C/N will always be?

a. -30 dB

b. 59.2 dBmV

c. 57 dBmV

d. 59.2 dB

d. 59.2 dB

If we raised the input level 2 dB above the noise figure and the input and output C/N improveed by?

a. 2.7

b. 4

c. 2

d. 5.4

c. 2

true / false

C/N at the output of a single amplifier is always better than that at the input by an amount equal to the amplifier's NF.

false

C/N at the output of a single amplifier is always worse than that at the input by an amount equal to the amplifier's NF.

Hey, if a piece of cable can create noise, imagine what an active device can do! The 10dB of noise, which was added by the amplifier, is defined as the amplifier's?

a. electrical noise

b. Amplifier noise

c. Cable noise

d. noise figure

d. noise figure

We know that at the input to this amplifier we have noise at a level of _____?

a. 59.2 dBmV

b. -59.2 dBmV

c. 25.1 db

d. -59.2 dB

b. -59.2 dBmV

The standards for (FCC)Carrier to Noise is?

a. 43 dB

b. 48 dB

c. 48 dBmV

d. 43 dBmV

a. 43 dB

The standards for Comcast Carrier to Noise is?

a. 43 dB

b. 46 dB

c. 43 dBmV

d. 44 dB

Cross Modulation XMOD is literally the?

a. ghosting of the same channel into each other

b. crossing of modulation from one channel to another

c. hum of electrical motor into one channel

d. both a and c

Cross Modulation typically manifests itself as a

a. horizontal bar and ghosting images that sweep throught the back of the affected channel

b. vertical and horizontal bar and ghosting images that sweep throught the back of the affected channel

c. vertical hum bars that sweeps throught the affected channel

d. vertical bar and ghosting images that sweep throught the back of the affected channel

What the five tyupes of system maps.

a. base, strand, design, plant maps, As built

b. stand, design, plant maps,  amplified schematics or tree, as built maps

c. base, strand, design, amplified schematics or tree, as build maps

d. plant, strand, design, amplified schematics or tree, as build maps

The cumulative effect of return path distortions added to the signal at various locations in the coaxial portion of the network.

a. tunnelling affect

b. whirl-wind affect

c. funneling affect

d. cumulative distortion affect

c. funneling affect

What does QAM stand for?

a. Quadrature Amplitube Modulation

b. Query Amplitude Media

c. Query Amplitude Modulation

d. Quadrature Amplitude Media

a. Quadrature Amplitube Modulation

5-42 MHz is used for?

a. forward

b. discovery channel

c. return

d. air traffic control

c. return

Individual (discrete) 3rd order beats in todays systems contraining over ____ channels are seldom the cause of interference.

a. 57

b. 61

c. 40

d. 77

c. 40

______ measures the ration of the error power to the average power in an ideal QAM sgnal.

a. BER

b. MER

c. forward error correction

d. noise power ration

b. MER

When ingress allow a locally broadcast channel's signal to enter the tv along with the channels signal supplied by the network is called?

a. following ghost

b. co-channel interference

c. leading ghost

d. return path interfenence

c. leading ghost

What is the FCC standard for leakage limits for the frequencies 54-216MHz.

a. 20mV per meter @ 3 meters 10 ft

15mV meter @ 30 meters 100ft

b. 24mV per meter @ 3 meters 10ft

10mV meter @ 30 meter 100ft

c. 30mV per meter @ 3 meters 10ft

19mV per meter @ 33 meters 200ft

a. 20mV per meter @ 3 meters 10 ft

    15mV meter @ 30 meters 100ft

d. 5-6

QAM

A. A Digital Modulation that cause a 6MHz to use by more then one channel but by two only.

B. Digital modulation scheme that changes phase and the amplitude.

c. Modulation that help cut out noise on the Return path for modem

d. A carrier modulation that cause better over all signal

B. Digital modulation scheme that changes phase and the amplitude.

Appear as two horizotal bar moving from the bottom to the top of the picture.

a. 60 cycle

b. 120 cycle

c. 240 cycle

d. both a an b

What is considered acceptable carrier-to-hum ratio?

a. 40dB or less (<3% hum)

b. 30dB or better (<3% hum)

c. 40dB or better (<5% hum)

d. 30dB or less (<5% hum)

b. 30dB or better (<3% hum)

for hum modulation

Appear as one horizotal bar moving from the bottom to the top of the picture.

a. 60 cycle

b. 120 cycle

c. 240 cycle

d. both a an b

The primary source of hum mudulation today is the?

a. high power A/C voltage

b. low voltaged DC power supply

c. power passing chokes

d. damaged power lines

c. power passing chokes used in passive devices

Delta is a

a. signal level

b. ratio

c. power level

d. return spectrum

The forward spectrum begins at?

a. 54 MHz

b. 42 MHz

c. 43 MHZ

d. 50 MHz

d. 50 MHz

true/false

dBmV is a unit of measurement.

What does QPSK stand for?

a. Quadrature Phased Shift Keying

b. Quality Placement Signal Keeping

c. Quality Phased signal Keying

d. Quadrature Phased Signal Keying

a. Quadrature Phased Shift Keying

QPSK phased shift keying with four states. The "Quad" refers to four phases in which a carrier is sent in QPSK:

a. 180, 90, 0, and 270 degrees

b. 25, 145, 225, and 270 degrees

c. 45, 135, 225, and 315 degrees

d. none of the above

QPSK constellation diagram shows the four symbols with each symbol equaling?

a. 1 bit

b. 2 bits

c. 4 bits

d. 8 bits

b. 2 bits

QAM is

a. a digital modulation plan that allows 2 channels of information to be transmitted at the same time on a particular frequency by changeing the phase and amplitube.

b. a digital modulation scheme that allows 2 channels of information to be transmitted at the same time on a particular frequency by changeing the phase and amplitube.

8bits is =

a. 1 nibble

b. 2 Bytes

c. 1 Byte

d. 3 nibbles

c. 1 Byte

4 bits =

a. 2 nibbles

b. 1 nibble

c. 1 Byte

d. 4 Byte

The Signal-to-Noise, S/N in decibels, is given by the formula;

a. S/N = 10 log10(Vs/Vn)

b. S/N = 20 log10(Vs/Vn)

c. S/N = 10 log20(Vn/Vn)

d. S/N = 20 log20(Vs/Vn)

b. S/N = 20 log10(Vs/Vn)

S/N or SNR is?

a. Signal-to-noise ratio is a measure of signal quality relative to background noise in analog and digital communications.

b. Signal-to-noise ratio is a measure of signal strength relative to background noise in analog and digital communications.

c. Signal-to-noise rate is a measure of signal quality relative to background noise in analog and digital communications.

false

b. Signal-to-noise ratio is a measure of signal strength relative to background noise in analog and digital communications.

Signal-to-noise is usually measured in.

a. nibbles

b. decibels dB

c. Byte

d. time

b. decibels dB

Modulation Error Ratio (MER) are?

a. the rate of the error power to the average power in an ideal QAM signal.

b. the timing of the error power to the average power in an ideal QAM signal.

c. the ratio of the error power to the average power in an ideal QAM signal.

c. the ratio of the error power to the average power in an ideal QPSK signal

Forward Error Correction (FEC) is

a. is method where additional data bits are added to the digital video bit stream to help identify and correct any errors that may be caused by the transmission system.

b. measure of signal quality relative to background noise in analog and digital communications.

c.the ratio of the error power to the average power in an ideal QAM signal

Bit Error Rate (BER)

a. is method where additional data bits are added to the digital video bit stream to help identify and correct any errors that may be caused by the transmission system.

b. Measures how often an error occurs in a given amount of data

c. the ratio of the error power to the average power in an ideal QAM signal

d. the rate of the error power to the average power in an ideal QAM signal.

It's a tests help to ensure that cable system's forward signals meet FCC standards. "POP"

a. Performance-of-Proof

b. Peer-to-Peer

c. Proof-of-Performance

d. Peak-to-Peak

c. Proof-of-Performance

FCC standards are as outlined in

a. form 320

b. CFR 47, Part 76.605(a) (1-12)

c. CFR 88, Part 76.605(a) (1-12)

d. CFR 50, Part 88.605(a) (1-12)

b. CFR 47, Part 76.605(a) (1-12)

Signal level at the customer's terminals.

a. +8/-8

b. 0/+10

c. -4/+10

d. 0/+15

d. 0/+15

A Tap ?

a. contains a splitter with loss plus the loss of the splitter(s) determines the tap value.

b. contains a directional coupler tap loss with loss plus the loss of the splitter(s) determines the tap value

c. Directional coupler that feeds single splitter (2 outputs), (4 outputs), or seven splitters (8 outputs).

d. both b and c.

d. both b and c.

c. Directional coupler that feeds single splitter (2 outputs), (4 outputs), or seven splitters (8 outputs).

b. contains a deirectional coupler tap loss with loss plus the loss of the splitter(s) determines the tap value

TAP is also know as a.

a. Teleco Access point

b. Transmission Access Point

c. Total Account Period

d. Transmission Access Period

b. Transmission Access Point

true/false

"Intermodulation Distortion" is Two signals mixed together inside the cable plant

Base Maps:

A.Shows streets with pole & pedestal locations.
B.Provide the layout of the system in a condensed form.
C.Resembles a street map, complete with featurs like lakes & rivers, streets, & boundaries.
D.Shows the locations of the electronic equipment, including the headend & any hubs, also amplifiers, power supplies, & taps.

C.Resembles a street map, complete with featurs like lakes & rivers, streets, & boundaries.

Strand Maps:

A.Shows streets with pole & pedestal locations.
B.Provide the layout of the system in a condensed form.
C.Resembles a street map, complete with featurs like lakes & rivers, streets, & boundaries.
D.Shows the locations of the electronic equipment, including the headend & any hubs, also amplifiers, power supplies, & taps.

Design Map:

A.Shows streets with pole & pedestal locations.
B.Provide the layout of the system in a condensed form.
C.Resembles a street map, complete with featurs like lakes & rivers, streets, & boundaries.
D.Shows the locations of the electronic equipment, including the headend & any hubs, also amplifiers, power supplies, & taps.

D.Shows the locations of the electronic equipment, including the headend & any hubs, also amplifiers, power supplies, & taps.

Amplifier Schematics or "Tree" Map:

A.Shows streets with pole & pedestal locations.
B.Provide the layout of the system in a condensed form.
C.Resembles a street map, complete with featurs like lakes & rivers, streets, & boundaries.
D.Shows the locations of the electronic equipment, including the headend & any hubs, also amplifiers, power supplies, & taps.

Another Name Of A Corrected Map:

A.Strand Map

B.As-Built

C.Design Map

D.Base Map

The Second Logical Backbone:

A.Comcast Backbone

B.CBone

C.IBone

D.Backbone

B.CBone

What is the pathway used for the actual light transmission?

A.Center Conductor

B.Fiber

C.Cladding

D.Core

3 parts of Fiber Optic Cable:

A.Core, Fiber, Sheathing
B.Fiber, Core, Coating
C.Cladding, Center Conductor, Coating
D. Coating, Cladding, Core

A Power Inserter is

a. is to pervent any power into plant cable

b. inserte power in to power passing TAP only

c. introduce AC power into network for use by the active devices

d. introduce DC power into network for use by the active devices

Optical Receiver does what?

a. Convert the incoming light to RF signals for the coaxial cable outputs.

b. Convert the incoming RF to Light signal for the coaxial cable outputs.

c. Amplifier for Light from the Hub to the Nodes.

d. A pair of glass made withstand damage to one eyes.

Scientists working in the glass industry discovered that if they cladded a glass fiber with glass having a different index of refraction and by using the principle of total____ _____they were able to transmit the light greater distances.

a. return reflection

b. bounce reflection

c. external reflection

d. internal reflection

d. internal reflection

This replace the Tree and Branch architecture as networks were  rebuilt or upgraded.

a. Hydrid Feeder Coax (HFC)

b. Hydrid Fiber Coax (HFC)

c. Network Architectures (NA)

d. The CRAN Regional Core (CRAN-RC)

b. Hydrid Fiber Coax (HFC)

The Purpose of the CRAN is?

a. provides a many common infrastructure in which all services are delivered via RF signal over a consistent transport and routing architecture.

b. provides a single common infrastructure in which all services are delivered via IP over a consistent transport and routing architecture.

c. enterconnect infrastructure servicers

d. replace the Tree and Branch infrastructure

The Ibone is?

a. Interconnected Back bone to all of the Comcast infrastructure

b. is a nationwide video/voice distribution network that carries Comcast traffic from CRAN to CRAN.

c. Is part of the System Maps

d. or Internet Backbone is use dto provide regions with access to national HSD peers and to global Internet access.

Separates or combines AC current's two parts: the AC power and the RF broadband signals.

a. Power Diplex

b. Diplex filter

c. Power passing chork

d. Power passing TAP

a. Power Diplex

Being able to carry and individually select different channels on a single cable by their unique frequency is called what

a. QPSK

b. FDM

c. QAM

d. PSK

b. FDM

Minimum distance between center of pole and span clamp.

a. 6"

b. 30"

c. 20"

d. 12"

Minimum distance between span clamp and the tap

a. 12"

b. 1"

c. 6"

d. 10"

Minimum aerial clearance for drops above public streets, alleys, roads, and commercial and residential driveways

a. 16'

b. 18'

c. 12'

d. 19'

Minimum distance between CATV drop and a power drop at the home.

a. 12'

b. 2'

c. 12"

d. 1'

Grounding wire should not exceed ____feet or the length of the shortest cable outlet

a. 1'

b. 12'

c. 20'

d. 50'

What is the log used for the FCC CLI.

a. Form 320

b. Form 550

c. CLI 3110

d. CLI act. 46. ver 26

what is the base color of the blue/blue white pair of CAT5e wire

a. white/blue

b. white

c. blue

d. blue/white

Used to compensate for fluctuations of the input signal, and the insertion loss required to give the a +/- 3dB window for adjustments.

a. pad

b. AGC

c. Equalizer

d. UPS

b. AGC

A Response Equalizer is also called a ___ ____.

a. clean up

b. equalizer timer

c. mop up

d. Attenuater pad

c. mop up

this device is used to try and correct for any undesired peaks or valleys within the passband of the amplifier.

Another name for a Pad

a. Equalizer

b. Attenuater

c. loading EQ

d. drop down

b. Attenuater

0dBmV = _____ mV

a. 2

b. 3

c. 1

d. 0

Number of phase states in a QAM carrier

a. 4

b. 16

c. 0

d. 8

TELNET Port

a. Port 5120

b. Port 2323

c. Port 500

d. 1000

b. Port 2323

TFTP

a. Trivial File Transfer Protocol

b. Timing Filing Transfer Porting

c. Trivial For Transfer

d. Tiling Forward Timing PQam

a. Trivial File Transfer Protocol

Individual (Discrete) 3rd order beats in todays system containing over ____ channels are seldom the cause of the interference.

a. 57

b. 40

c. 61

d. 77

For a stable system, one where the levels move no more than 1.5 dB, a minimum C/CTB ration with CW carriers would be ___ with ___ as the goal.

a. 51 dB with 53 db as the goal

b. 55 dB with 57 db as the goal

c. 57 dB with 63 db as the goal

d. 50 dB with 53 db as the goal

54 mhz is what channels?

a. 13

b. 5

c. 4

d. 2

 A reading on you meter 0dBmV is the = to

a. 0 volts

b. .001 volts

c. 1 volt

d. none of the above

Delta is _____?

a. timing

b. rate

c. measurement of dBmV

d. ratio

If you are checking a cust. drop and/or house for ingress with you meter what freq. will you set you meter to check?

a. 5 to 50Mhz

b. 10 to 50Mhz

c. 5 to 42Mhz

d. 5 to 44Mhz

One of the this this device does is Separates (and recombines) the forward and reverse signals from the coaxial cable so they can be routed to (and from) the appropriate components within the amplifier station.

a. Power Diplex

b. Diplex Filter

c. power passing tap

d. power passing choke

b. Diplex Filter

One the devices in a Amplifier is a Return amplifer what does it do?

a. Used to boost the return signal

b. typically ranges is 5 to 42 MHz

c. Usually has a gain of 20 dB

d. all the above

d. all the above

a. Used to boost the return signal

b. typically ranges is 5 to 42 MHz

c. Usually has a gain of 20 dB