MT1 to MT2 SCTE Final TEST 2022

What RF Levels are commonly considered to be an indication of sufficient analog video level at the RF input of a TV set?

0 to +15

what is the channel bandwidth of a return signal? (Choose 3)

1.6, 3.2, 6.4

What is the modulation scheme typically used for downstream DOCSIS Communication over HFC Networks?

256

For Long cascades (number of amplifiers greater than 10) each time the number of amplifiers in the cascades doubles the CSO worsens by:

4db

what is upstream frequency range for a high-split architecture

5-200 MHz

What is the return path spectrum used by a non-EuroDOCSIS sub split architecture?

5-42 MHz

The LTE Spectrum currently occupies what frequency band?

700-800 MHz

The Ports of a line Power Inserter are:

AC/RF AC/RF and AC/input

initial field studies that measure leakage at both high and low frequencies indicate what trends?

All the above

What type of filter blocks a band of frequencies?

Band Rejection Filter

How is the distance between equalizer taps that show strong echoes used to calculate the location of the plant impairment?

By counting the number of taps between echoes

Which is NOT one of the Six categories of non-linear distortion products?

Channel to Channel amplitude inequality

You are on an outage and find an amplifier with good RF input, NO RF output, and no AC Voltage. you Should:

Check commercial power is available.

50 Hz/ 60 Hz power from the line power supply is injected onto coaxial cable by a Line Power inserter.

False

True/False: The HFC is similar to the coaxial topology except that long trunk runs are replaced by twisted pair copper.

False

True/False: intermodulation distortions are related to input.

False

the frequency response test checks the impedance math of all ports on active device.

False

Which of the following is NOT provided by proactive network maintenance technology?

Group delay

Slowly moving horizontal bars in an analog television picture are typically caused by:

Hum modulation

Which of the following is NOT an off-air user of return path RF Spectrum?

LTE cellular Data

what type of topology is the downstream of an HFC access network?

Multipoint to point

What is the term applied to undesirable signals that are produced by non-linear devices in the network?

Noise

Which of the Following is NOT an impairment that can be seen with full RF capture technology in proactive network Maintenance technology?

None of the Above

Which of the Following is NOT a general recommended procedure for making return path measurements on cable systems?

None of the above

Which of the Following is NOT a method to Increase the accuracy of impairment location estimates from pre-equalization coefficient analysis in proactive network maintenance technology?

None of the above.

Which impairment is caused by bad or corroded connectors, lids or fittings?

Notches

A crowbar circuit monitors:

Output voltage

RFoG mini Nodes typically have two F-connectors. One is for RF and may be used to apply power. the other is for:

Power Only

Which test of checks the operation of the power supply and associated circuits prior to installation?

Power UP test

The output of a Line Power Supply waveform is sometimes called:

Quasi-square wave

MPEG Compression is based on two main redundancy algorithms; spacial/ intra-coding and:

Temporal/ inter-coding Temporal /inter-coding

What impairment is always present as a result of the random motion of electrons?

Thermal Noise

Rough Balancing sets the starting level for tilt when a system is being activated.

True

TRUE/FALSE: Beats are additional signals that are created by distortions in the signal.

True

True or False: Noise Funneling in the upstream direction results in noise at the headend that is greater than at any single source out in the network.

True

True/False: Audio and Video information are impressed on an RF carrier by a process called Modulation.

True

True/False: Coaxial Cable Verification Should be done prior to construction.

True

True/False: Prior to construction the attenuation of known lengths of coaxial cable are tested at-40 degrees F, 68 degrees F and 140 degrees F.

True

True/false: Excessive intermodulation, low C/N or hum in a downstream digital signal typically will cause the picture to macroblock.

True

When looking at the constellation of QAM signal, the area in which each point of the constellation falls is called a _________ area.

boundary

How is the channel frequency response (ICFR) calcualted from pre-equalization coefficients?

by taking the Fast Fourier Transform (FFT) of the coefficients

Frames are located at the ___ layer of the OSI model.

data-link

The two most commonly used antennas for leakage detection are:

dipole, monopole

Which of the following is a disadvantage of using hubs within an architecture?

increased power requirements

Which Test is used to verify passive devices?

isolation

Typical switching power supply switching frequencies are in the

kHz range

What is an acceptable level of HUM Modulation?

less than 3%

Which two way RF configuration uses 104MHz up to 1000 MHz for the downstream?

mid split

To provide guide data and other information such as the virtual channel mapping to set-top boxes, a(n) ______ channel is used:

out of band

Digital video compression of the digitized video decreases the data rate or bandwidth by:

removing redundant information

What step comes after the isolate step in the troubleshooting process?

resolve

This is a ______ distortion. (house with car with waves coming from top of pic to bottom of pic)

second order distortion