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CommTech Jeopardy > bris > Flashcards

bris Flashcards

1
Q

All passive and active equipment shall support a forward bandwidth of

A

54 MHz to 1,002MHz (1 GHz)

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2
Q

All passive and active equipment shall support a return bandwidth of

A

5 MHz to 42 MHz

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3
Q

ANSI/SCTE code for ground blocks

A

129 2007

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4
Q

A F-port must have this at the base to accommodate weatherproofing devices.

A

a non-threaded area

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5
Q

The bonding wire attachment must accommodate this range of wire sizes

A

6 AWG to #14 AWG solid copper

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6
Q

Cable specifications in all new installations

A

minimum Series 6 with a minimum foil-braid, tri-shield configuration that includes a bonded inner foil tape and outer foil bonded to the jacket and at least 77% braid coverage

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7
Q

ANSI/SCTE code for drop amplifiers

A

161 2009

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8
Q

ANSI/SCTE code for indoor f-81 splice connectors

A

02 2006

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9
Q

An F-81 indoor splice connector must have at least one end with what

A

threads all the way to the base of the port to accommodate panel nuts and mounting to wall plates

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10
Q

Plastic fasteners must be

A

UV and ozone stable

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11
Q

requirements for a clip gun

A

must use a half-round plastic insert to prevent crushing

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12
Q

ANSI/SCTE minimum mechanical and electrical specifications for all passive devices

A

153 2008

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13
Q

Cutting blades in all drop cable preparation tools shall be replaced

A

monthly

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14
Q

Why must drop cable preparation tools have a notch in the dielectric cutting blade

A

to prevent nicking or scoring of the center conductor

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15
Q

Locking terminators must have what inside

A

an internal 75-ohm resistor

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16
Q

When must a locking terminator be sealed

A

When a disconnected drop is parked on the locking terminator

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17
Q

Why must a thread protector have a uniform internal inside diameter through the full length of the thread proctector

A

It allows the thread protector to be installed from either direction and ensures secure compression of the sleeve over a variety of female F-port lengths

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18
Q

Why must wall plates have a 7/16-inch hex recess molded in the wall plate

A

to hold the F-81 and prevent it from turning

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19
Q

What are requirements for f-connectors

A

compression-type with 360-degree retention of the cable

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20
Q

How often should compression tools be inspected

A

monthly

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21
Q

What must be done to drop before changing its connector at the groundblock

A

Drop must be disconnected from live plant to minimize inadvertent injection of noise

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22
Q

All aerial drops must meet the requirements of what Article of the National Electrical Code at a minimum

A

Article 820

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23
Q

Cable used for aerial installations must have

A

messenger wire or integral self supporting strength member

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24
Q

Aerial drop cable must have what on the braid wires?

A

A non-flowing flooding compound

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25
Q

What is max allowable length of series 6 drop cable?

A

150 feet

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26
Q

Series-11 or QR-320 cable is permissible only for aerial drops when

A

it is greater than 150 feet in length AND where its use will improve RF forward signal levels to within acceptable ranges as defined in Section 9 of this standard, and will therefore eliminate the need for RF signal amplification in the home

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27
Q

What must be used to prevent the messenger wire from separating from the drop cable?

A

S cable clips

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28
Q

Aerial drops must not interfere with what at the pole?

A

climbing space

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29
Q

Aerial drop routing must follow what whenever possible?

A

power service drop

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30
Q

When an aerial drop crosses property lines outside of the municipal right-of-way, it is called

A

cable trespass

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31
Q

What on strand device must be used to avoid cable trespass?

A

a mid-span drop attachment

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32
Q

What cannot be crossed with an aerial drop?

A

swimming pools and utility lines

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33
Q

How many splices or splits are allowed between the tap and the grounding point at the house?

A

Zero

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34
Q

How many splices are allowed on a temporary aerial drop

A

Two (one between the tap and span clamp) and (one between house attachment and ground-block)

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35
Q

Drop clearance from power at the pole

A

40 inches

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36
Q

Drop clearance from power at the mid-span

A

24 inches

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37
Q

Drop clearance from power at the house

A

12 inches

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38
Q

Drop clearance from Phone or other Telecom providers at the pole

A

12 inches

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39
Q

Drop clearance from Phone or other Telecom providers a the house

A

6 inches

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40
Q

Drop clearance from Phone or other Telecom providers at the mid-span

A

6 inches

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41
Q

Drop clearance over roads, streets, alleys; nonresidential driveways; parking lots and other areas subject to traffic

A

18 feet

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42
Q

Drop clearance over residential driveways subject to truck traffic

A

15.5 feet

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43
Q

drop clearance over residential driveways not subject to truck traffic

A

11.5 feet

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44
Q

Drop clearance above sidewalks or other pedestrian traffic areas

A

10 feet

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45
Q

Drop clearance of all points above a flat roof

A

10.5 feet

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46
Q

minimum distance span clamp must be from the hardline connector of any equipment.

A

6 inches

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47
Q

Minimum that span clamps on either side of a pole must be attached from the center of the pole

A

30 inches

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48
Q

Only approved location to attach a span clamp

A

the strand

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49
Q

What must a span clamp NEVER be placed over

A

lashing wire

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50
Q

To prevent cable damage, what must be used over hardline cable everywhere the hardline cable is lashed up to the strand and is close to the span clamp location?

A

cable guards

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51
Q

Minimum climbing area from center of pole that must be maintained at all times

A

30 inches

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52
Q

When attaching the drop cable to the opposite side of the pole from the tap, what is the minimum diameter of the drip loop from grip to strand?

A

5 inch diameter

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53
Q

When routing the drop cable on the strand, which side must it be run on?

A

Underside

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54
Q

What does tying the drop to the underside of the strand prevent?

A

squirrel chews

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55
Q

The only hardware a drop may be attached to

A

Comcast owned hardware

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56
Q

What method can be used to attach the drop to a span clamp or house hook (legacy only)

A

The 2-4-4 method (or equivalent) or approved drop clamp hardware

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57
Q

What is the 2-4-4 method?

A

a) separating a minimum of two feet of messenger wire from the coaxb) passing the messenger wire through the hook TWICE and pulling it tightly while ensuring the messenger wire does not cross over itselfc) wrapping the messenger wire FOUR TIMES tightly around itself d) wrapping the messenger wire a minimum of FOUR TIMES around the unseparated drop cable and messenger to prevent any further separation of the drop cable and messenger. Any excess messenger wire must be trimmed off

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58
Q

When attaching a drop to the house, the drop cable must have what sag?

A

Drop cable must match the sag of the power drop. If there is no power drop reference, the drop cable must be tensioned for a minimum of 6 inches of sag for every 50 feet in length

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59
Q

When installing a mid-span drop, what order must the drop be installed in?

A

Pole to mid-span point, and then to the house

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60
Q

What is the only Comcast hardware a multi-span clamp must be attached to?

A

The Strand

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61
Q

To prevent cable damage, what must be placed between the multi-span clamp and the distribution cables?

A

Cable gaurds

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62
Q

How much messenger wire separation should be on each side of the multi-span clamp?

A

3 inches

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63
Q

What is the minimum drip loop at a midspan?

A

5 inches

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64
Q

How far from the multi-span clamp should the S cable clip be attached to the cable and messenger wire?

A

approximately 3 inches

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65
Q

Minimum drip loop half circle from drop cable grip to the aerial tap port

A

5-inch-diameter

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66
Q

What must be placed on every aerial drop at the tap?

A

a drop address and service tag

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67
Q

What must be done to unused tap ports?

A

install a locking terminator with internal 75-ohm resistor, and wrench-tightened to a minimum 20 inch-pounds

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68
Q

How must a trap be attached to an aerial tap port?

A

a)A jumper between the aerial tap port and trap must be used if the trap is longer than the locking terminator.b) must be attached to the strand or to a trap hanger bracket.c) cannot have strain on the drop and maintain minimum bend radius.

69
Q

Name 3 devices that service drops must NEVER be attached to

A

power service mast, TV antennas, chimneys, lightening rods, or gutters

70
Q

How should a house hook be installed to prevent it from pulling out of the house?

A

install into a stud or other strong support wood with the drop ran at right angles whenever possible

71
Q

After attaching the aerial drop cable to the house hook, what must be removed between the hook and the ground block location?

A

the messenger wire

72
Q

Vertical clips must be placed

A

30-36 inches apart

73
Q

horizontal clips must be spaced

A

18-24 inches apart

74
Q

Cables used for underground installations have what kind of cable jacket?

A

polyethylene (PE)

75
Q

Cables used for underground installations must have what on the braiding?

A

a flooding self healing compound

76
Q

All new underground installations must have cable installed in

A

an approved conduit

77
Q

conduit for underground drops must be buried to a minimum depth of

A

12 inches

78
Q

When not installed completely in conduit, the protective conduit or molding must extend at least_____ below the ground.

A

8 inches

79
Q

How must an underground drop enter the pedestal or enclosure?

A

From underneath (never through the lid)

80
Q

When routing the underground drop parallel to lot lines, routing must stay _____ away from those lines

A

4 feet

81
Q

Underground drop cable must extend a minimum of _______ above the tap at the pedestal or vault.

A

12 inches

82
Q

Underground drop cable must extend a minimum of _______ past the ground block at the house.

A

12 inches

83
Q

The end of all underground drop conduit or molding at the house and pedestal must be sealed with

A

Room Temperature Vulcanizing (RTV) sealant or duct cap

84
Q

Underground drop cables routed down a pole must have physical protection, cable guard or conduit, to a point at least ______ above ground

A

8 feet

85
Q

How many splices are allowed in all newly buried underground drop cables between the tap and the grounding point at the house?

A

zero 0

86
Q

Underground drop restorations requiring splicing must allow only ______ splice(s) in any cable shorter than 60 feet and not crossing a driveway

A

1

87
Q

Underground cable restorations requiring splicing must allow only _____ splices in any cable longer than 60 feet and not crossing a driveway.

A

2

88
Q

Underground drop cable restorations requiring splicing must allow only ______ splices in any cable section between driveways (independent of length.)

A

2

89
Q

If a cable is damaged under a sidewalk or driveway how should it be repaired?

A

A new cable must be placed for that portion and must be spliced a minimum of 12 inches from the edge of the sidewalk or driveway. Extra cable at the splice locations must be left to prevent pull-out caused by frost heaving.

90
Q

For taps in a pedestal where the pedestal is not large enough to attach the disconnected drop to the locking terminator and still maintain the minimum bend radius of the cable, use what to protect the disconnected cable and connector.

A

drop saver plug-type device or approved encapsulating device

91
Q

How must a trap be installed in a pedestal?

A

A jumper between the underground tap port and trap and trap must be attached to the feeder cable, pedestal stake or to a trap holder bracket.

92
Q

If it is not possible to run the temporary drop along an existing fence line or if the drop must be ran in locations where pedestrian traffic cannot be prohibited what must be done to the drop?

A

Drop must be marked with fluorescent flags or wrapped with caution tape. Rubber cord covers and u-type hold downs also must be used.

93
Q

What is the target time for drops to be buried, weather permitting?

A

No later than 30 days

94
Q

What is the demarcation point between the outside network drop cable and the internal home distribution wiring?

A

The service distribution point outside the home

95
Q

how high off the ground should a service enclosure be mounted?

A

four to five feet

96
Q

The minimum distance a service distribution enclosure should be from power

A

one foot

97
Q

where must a service distribution enclosure be mounted for a mobile home installations?

A

on service pole

98
Q

What is ground wire made of?

A

solid copper

99
Q

What size ground wire should be used for Series-6 drop cable?

A

12 AWG

100
Q

What size ground wire conductor should be used for Series-11 or QR-320 drop cable

A

6 AWG

101
Q

What must be checked before connecting the grounding conductor to the ground block?

A

FVD to check for voltage

102
Q

What is the max length of a grounding conductor?

A

20 feet

103
Q

Bonding Option 1A

A

The drop should be bonded to the structure’s electrical service on the #6 AWG solid copper stub

104
Q

Bonding Option 2

A

The drop should be bonded to he power company grounding conductor.

105
Q

Bonding Option 3

A

directly to the power company grounding electrode.

106
Q

Bonding Option 4

A

The drop shall be bonded to grounded metallic conduit.

107
Q

Bonding Option 5

A

The drop may be bonded to the metallic meter cabinet

108
Q

Bonding Option 6

A

The drop may be bonded the the GROUNDED interior metal cold water piping system

109
Q

How many bonding options are available for houses?

A

6

110
Q

When bonding a mobile home what is preferred location to ground?

A

To power service equipment if it is within 30 ft of the mobile home

111
Q

What are requirements to bond a mobile home drop to the tap?

A

tap pedestal must be co-located with a power pedestal and both must be within 30 feet of the mobile homeAWG # 6 must be used

112
Q

If a mobile home is more than 30 feet from the electrical service equipment, how should the drop be bonded?

A

Bond to the grounded metal I-beam underneath the mobile home

113
Q

When should CATVR riser cable be used?

A

in a vertical run in a shaft or from floor to floor in multiple dwelling units

114
Q

When should CATVP plenum be used?

A

in environmental air handling plenums and ducts

115
Q

Why must white or beige cables never be used for exterior wiring?

A

They are not UV/ozone stable and will deteriorate when installed outdoors.

116
Q

Drop cable must NEVER be attached to what?

A

water pipes, gas lines, commercial power lines, or any other structure where it might interfere with other services or utilities

117
Q

How should cable be routed on a structure?

A

must follow the natural lines of the structure and must be done to minimize the visibility of the cable.

118
Q

How should a hole be drilled to prevent water damage?

A

All exterior entry holes must be drilled so that the outside hole is slightly lower than the hole on the inside of the wall.

119
Q

When should drilling be done from the inside out?

A

For wood siding

120
Q

When should drilling be done from the outside in?

A

For every material but wood including metal, slate, stucco, hard asphalt or brick.

121
Q

What should always be installed over the drop cable before inserting the cable through any outside hole?

A

An outside feed-through bushing

122
Q

What must one have before drilling a foundation wall?

A

supervisor approval

123
Q

This must be placed on the feed through bushing and around the drop cable going through the bushing?

A

RTV sealant

124
Q

Where should entry holes come into a mobile home?

A

Through the floor only, never drill through the outside wall of a mobile home

125
Q

What must be installed in the floor entry hole in a mobile home before installing the cable?

A

a wall bushing

126
Q

How must cable never be run inside homes?

A

under carpet, or up and over or through door frames or windows.

127
Q

Why must excessively long jumpers between outlets and any cpe be avoided?

A

to eliminate any tripping hazards

128
Q

When routing cable through a finished or partially finished basement how must the cable be routed?

A

parallel or perpendicular to the floor joists, never diagonally. and never to the bottom of the floor joists

129
Q

When drilling a hole through a floor joist what is the minimum distance from the bottom of the joist that can be drilled?

A

2 inches

130
Q

What section of the floor joist should be avoided when drilling?

A

The middle one-third

131
Q

What are the mounting requirements for wall plates?

A

must be same height as the electrical outlets in the room and no closer than 6” from any electrical out

132
Q

When running an outlet to an emta what requirements must be followed?

A

it must be a permanent, un-interrupted and un-amplified home-run cable

133
Q

Why must unused outlets in the home not be connected

A

to prevent potential RF egress/ingress points.

134
Q

What must be done to unused rf ports on a splitter?

A

install a 75 ohm terminator

135
Q

The minimum RF signal level of individual forward video carriers at any wired outlet inside the home

A

0 dBmV

136
Q

The maximum RF signal level of individual forward analog video carriers at any wired outlet inside the home

A

+15 dBmV

137
Q

The minimum RF signal level of individual forward digital QAM carriers at any wired outlet inside the home

A

-8 dBmV

138
Q

The maximum RF signal level of individual forward digital QAM carriers at any wired outlet inside the home

A

+10 dBmV

139
Q

If measured tap levels do not fall within expected market engineering network design tolerances what must be created?

A

a plant maintenance ticket or (RTM) refer to maintanence

140
Q

What is the preferred splitter configuration for a home with 4 outlets

A

one 4-way splitter

141
Q

What is the preferred splitter configuration for a home with more than 4 and up to 8 wired outlets

A

one 8-way splitter

142
Q

Name 3 styles of aerial drops that need to be replaced when serviced

A

1.all non-messengered aerial drop cables, 2.all Series 59 size aerial drop cable3. drop cables with copper braid wires,4. cables that have a solid dielectric material 5.drop cables that do not have the inner foil bonded to the dielectric and the inner foil is pushed back when attempting to install the F-connector 6. exhibit significant physical damage7.If drop has a splice between tap and bonding location

143
Q

Name 3 styles of underground drops that need to be replaced when serviced

A

cables with copper braid wires, cables with solid dielectric material, cables that do not have an underground flooding compound applied to the braid, and cables that do not have a polyethylene (PE) jacket.Drops that exceed the acceptable number of splices

144
Q

what types of indoor drop cables must be replaced with new 6 series drop cable?

A

all cables with copper braid wires, cables that have a solid dielectric material, drop cables that do not have the inner foil bonded to the dielectric and the foil is pushed back when attempting to install the F-connector, all damaged Series 59 size cables interfering with proper RF signal reception

145
Q

name 3 of 5 reasons a connector must be replaced

A

hex-crimp type connectors, screw-on type connectors, i.e. connectors that thread onto the drop cable, push-on type connectors, all external non-weather-tight connectors, connectors that are corroded, moist or wet inside, have a black center conductor or show other signs of moisture contamination

146
Q

What specifications must all splitters or passives meet

A

have bandwidth of 1,002 MHz (1 GHz) and support a minimum return bandwidth of 5 MHz to 42 MHz

147
Q

Minimum bending radius for RG11?

A

4.5”

148
Q

ANSI/SCTE specifications for Braided 75 ohm flex RF coax drop cable

A

74 2003

149
Q

ANSI/SCTE specification for outdoor f-port

A

01 2006

150
Q

BRIS requirements for amplfiers

A

1.Must be capable of remote powering2.Amplification on the forward path must be unity gain3.must be a 5 port or 9 port4.External passive port5.Single housing style6.a mechanism to properly terminate the internally amplified legs when DC power is removed from the amplifier

151
Q

F-connectors on an outdoor f-port must be tightened to

A

a minimum of 20 inch pounds

152
Q

According to SCTE standards thread protectors must be able to protect port lengths of

A

.500 inch

153
Q

When must a jumper be used for a trap on an aerial tap?

A

If the traps exceeds length of locking terminators

154
Q

Drop clearance above roofs not accessible to pedestrians

A

3 feet

155
Q

Bonding Option 1B

A

the grounding bridge on the copper stub

156
Q

Requirements for running cable on a flat roof

A

cable cannot lay on the roofRoof must have a parapetcable must be run along top inside edge of parapetAbove roofing material3 to 4 inches below edge of the parapetNever drill through the roof

157
Q

What is the maximum a loop in the cable can be (in degrees) on an installation without a service enclosure?

A

270 degrees

158
Q

what is the proper amplifier configuration for homes with 10 active outlets?

A

2 way splitter feeding into (2) 5 port amplifiers

159
Q

What is the proper amplifier configuration for homes with 11 or more active outlets?

A

2-Way feeding into (2) 9-Port amplifiers

160
Q

minimum clearances above alleys and commercial driveways

A

16 feet

161
Q

Upstream Ingress Maximum Threshold (5-45 MHz) at tap or groundblock

A

-30 dBmV

162
Q

What is DOCSIS Transmit Power Maximum Level at CPE

A

54 dBmV

163
Q

Downstream SNR Minimum Level at CPE

A

35 dB

164
Q

Legacy STB Upstream Power Maximum Level

A

57 dBmV

165
Q

Digital 256 QAM Maximum Level at CPE

A

10 dBmV

166
Q

Digital 256 QAM Minimum Level at CPE

A

-8 dBmV

167
Q

MER 256 QAM Minimum Threshold at CPE

A

35 dB

168
Q

BER Pre-Fec Minimum Threshold at CPE

A

less than 1.0E-07

CommTech Jeopardy (32 decks)

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