BDS Signal Distribution and Amplification 3

Question 1

What does the term 'cascade' refer to in a cable coaxial distribution system?

Accepted Answer

The series of amplifiers connected end-to-end between the headend and the subscriber

Answer

The total number of subscribers served by a node

Answer

The process of updating firmware on field amplifiers

Answer

The routing table used by CMTS to direct traffic

Question 2

Which passive device is used to connect a subscriber's drop cable to the distribution feeder cable?

Accepted Answer

Tap

Answer

Splitter

Answer

Directional coupler

Answer

Attenuator

Question 3

What is the typical frequency range allocated for the upstream return path in a DOCSIS 3.0 cable plant?

Accepted Answer

5–42 MHz

Answer

54–108 MHz

Answer

750–862 MHz

Answer

1002–1218 MHz

Question 4

What is cross-modulation distortion in a cable amplifier?

Accepted Answer

Distortion where modulation from one carrier is transferred to another carrier

Answer

Noise generated by the amplifier's power supply

Answer

Interference caused by ingress from over-the-air signals

Answer

Distortion due to impedance mismatch at connectors

Question 5

A technician finds that signal levels drop significantly on hot summer days. What is the most likely cause?

Accepted Answer

Thermal expansion of coaxial cable increasing attenuation

Answer

Increased subscriber usage overloading the network

Answer

Headend reducing power output during peak hours

Answer

Interference from HVAC equipment near the node

Question 6

What is the purpose of a pad (attenuator) when installed at an amplifier input?

Accepted Answer

To reduce the input signal level to the amplifier's optimal operating range

Answer

To increase gain for weak input signals

Answer

To improve the amplifier's noise figure

Answer

To block reverse-path signals from entering the amplifier