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Jared Nationals > Network Online Tools > Flashcards

Network Online Tools Flashcards

1
Q

This is a signal correction process in which the CMTS commands the modem to pre-distort its transmitted RF to overcome plant impairments between the CM and the CMTS

A

Adaptive Equalization

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2
Q

Here you can see the results from the file upload from the device query performed under the real time CM tab in Scout Monitor.

A

Batch Results

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3
Q

This Scout Monitor tool is designed to give real-time information on the performance of each individual upstream channel that serves a group of devices.

A

CMTS Microscope

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4
Q

The data transmitted between the CMTS and the modem is split into these, which allows for error correction

A

Code Words

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5
Q

This icon in Scout Monitor provides a view into which upstream channel(s) are being used by a particular node.

A

Node Lookup

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6
Q

This is assigned a service flow by the CMTS

A

Upstream Channel

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7
Q

DOCSIS uses these to identify which service flow on which cable modem may use the allocated upstream channel bandwidth.

A

Service Identifier (SID)

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8
Q

This refers to damaged codewords between the CMTS and modem that can be repaired.

A

FEC Corrected

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9
Q

This refers to damaged codewords between the CMTS and modem that can not be repaired.

A

FEC Uncorrected

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10
Q

This menu option in Scout takes you to the home page

A

Home

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11
Q

This menu option in Scout is for logging out or where administrators will go to access administrative features

A

Admin

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12
Q

This menu option in Scout is for accessing pages related to real-time device data

A

Device Watch

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13
Q

This menu option in Scout is for accessing Xfinity Voice, Call Summary, and Upstream Interface Settings

A

CMTS Tools

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14
Q

This menu option in Scout is for accessing pages related to legacy digital set top box (or STB) video monitoring

A

Video Monitoring

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15
Q

This menu option in Scout is for finding rollup summary data for Upstream Forward Error Correction (or FEC) rates, video STBs, and Video On Demand, or VOD streams.

A

Dashboards

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16
Q

This device watch submenu is where you can enter a customer device to be monitored for the online status every 10 minutes

A

CM Watch

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17
Q

This device watch submenu is where you can find information for a particular customer

A

Customer Report

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18
Q

This device watch submenu is where you can enter a node and the tool does a real-time check on all the modems in that node looking for a service outages or potential degraded service issues.

A

Node Analyzer

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19
Q

This device watch submenu is where you can create a custom report that displays real-time data for a particular device with the attributes you select

A

Real Time CM

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20
Q

This device watch submenu is where you can see the results from the file upload from the device query performed under the real time CM tab

A

Batch Results

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21
Q

This Dashboard submenu is where you can view the upstream uncorrectable error rates for an entire upstream channel, or view all of the upstream channels on a particular CMTS

A

FEC Dashboard

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22
Q

In the customer report modem toolbox, the magnifying glass is the icon for this tool

A

Modem Microscope

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23
Q

In the customer report modem toolbox, the globe is the icon for this tool

A

Proximity

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24
Q

In the customer report modem toolbox, the line graph is the icon for this tool

A

Charts

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25
Q

In the customer report modem toolbox, the Bell is the icon for this tool

A

ping

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26
Q

In the customer report modem toolbox, the Microscope is the icon for this tool

A

CMTS Microscope

27
Q

In the customer report modem toolbox, the H is the icon for this tool

A

FEC History

28
Q

In the customer report modem toolbox, the Telephone icon is for this tool

A

CDV Call Summary

29
Q

In the customer report modem toolbox, the earmarked paper icon is for this tool

A

CMTS Summary

30
Q

In the customer report modem toolbox, the notebook icon is for this tool

A

Event Log

31
Q

In the customer report modem toolbox, the Flux icon is for this tool

A

Adaptive Equalization

32
Q

In the customer report modem toolbox, the red button icon is for this tool

A

Modem Reset

33
Q

In the customer report modem toolbox, the Arris logo icon is for this tool

A

Arris Status

34
Q

In the customer report modem toolbox, the computer icon is for this tool

A

CPE/Router Queries

35
Q

This is the formula for calculating FEC uncorrected percentage

A

uncorrectable codewords divided by total codewords

36
Q

This is the bouncing back and forth of a signal between two interfaces that have an impedance mismatch

A

Micro Reflection

37
Q

This generates an amplitude and phase distortion of signal

A

Micro Reflection

38
Q

This signal distortion can be used to estimate the location of a line problem

A

Micro Reflection

39
Q

This is a non-flat frequency response in which the amplitude versus frequency characteristic of the channel or operating spectrum is sloped or tilted across a specific frequency range

A

Amplitude Tilt

40
Q

These are the most common causes of micro-reflections

A

Unterminated ports, bad connectors, damaged cable

41
Q

These are the most common causes of amplitude tilt

A

loose mainline/house fittings, corrosion, kinked cable, low quality splitters, and water in cable

42
Q

This is observed when all portions of the channel do not arrive at the receiver at the same time.

A

Group Delay

43
Q

This is the most common cause of group delay

A

diplex filter or any filtering mechanism

44
Q

These are three linear distortions

A

Micro Reflections, Amplitude Tilt, and Group Delay

45
Q

These are the “3 D’s” of impedance mismatch

A

Diameter of center-conductor, Distance from center-conductor to sheath, and Dielectric

46
Q

This is both an analog and a digital modulation scheme that converts two analog message signals and two digital bit streams

A

QAM Constellations

47
Q

This is a window of amplitude between the vestigial sideband and the aural carrier

A

In-Channel Frequency Response (ICFR)

48
Q

This is a method of determining the cavity distance between two reflectors measuring signal amplitude deviating up or down in .75 dB increments

A

Ripples

49
Q

eTDR

A

Equalized Time Domain Reflector

50
Q

This performs the distance calculations and displays the determined cavity size for echoes in scout flux.

A

(Equalized Time Domain Reflector) eTDR

51
Q

The eTDR, without interpolation, is accurate within this length

A

42.5 ft

52
Q

The eTDR, with interpolation and correct Velocity of Propagation, is usually accurate within this length

A

20 ft

53
Q

This can be selected from the drop-down menu just below the node number on the top toolbar of NWT Flux

A

Frequency

54
Q

When you enter NWT Flux for the first time, it will default to this view

A

Map

55
Q

In the NWT Flux map view, you can change the map and theme options from these two default options

A

Signatures and Device Count

56
Q

This happens when a transmitted signal encounters an impedance mismatch, and some of the signal is reflected back onto the transmitted signal causing signals to build up amplitude in some locations and cancel in others

A

Standing Waves

57
Q

This is caused by corrosion or poor grounding, mainly in passives, which can change the passive characteristics and create a tuned circuit; in effect, a filter.

A

RF Notch

58
Q

This is a very long standing wave caused by a very short reflective cavity and is generally caused by an impedance mismatch within an active device where the source and reflected signals are very strong

A

Frequency Suck Out

59
Q

This is caused by a lack of shielding integrity

A

Ingress

60
Q

This is caused by frequency sensitive attenuation or by settings made at actives that cause the signal to gradually rise over the entire spectrum or gradually drop off

A

Overall Tilt

61
Q

Three tests an NCT will perform with their meter

A

Sweep, Leakage Detection, Active Test Points

62
Q

The formula for calculating the distance to the fault causing a standing wave in spectra

A

( Velocity of propagation / Width in MHz between peak or null ) x 492

63
Q

These are corrupted bits of data in the transmission or flow between the CMTS and modem.

A

Codeword Errors

64
Q

This NWT Flux mode simply identifies groups of modems with common signatures. The colors do not indicate the type or severity of a problem.

A

Signature Mode

Jared Nationals (14 decks)

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