BDS Signal Distribution and Amplification

Question 1

What is the primary purpose of a distribution amplifier in a cable broadband system?

Accepted Answer

To compensate for signal loss in the coaxial cable plant

Answer

To convert analog signals to digital

Answer

To encrypt subscriber traffic

Answer

To route IP packets between nodes

Question 2

Which parameter describes the ratio of desired signal power to noise power in a cable distribution system?

Accepted Answer

CNR

Answer

MER

Answer

SNR

Answer

BER

Question 3

A BDS technician measures a -6 dBmV signal level at a tap port. After a 3.5 dB tap value, what is the signal level on the output side of the tap?

Accepted Answer

-9.5 dBmV

Answer

-2.5 dBmV

Answer

-6 dBmV

Answer

-12 dBmV

Question 4

What is the typical downstream frequency range used by DOCSIS 3.1 systems in the US cable plant?

Accepted Answer

54–1002 MHz

Answer

5–42 MHz

Answer

108–750 MHz

Answer

5–85 MHz

Question 5

Which type of amplifier is typically used at the output of a cable headend to drive the trunk coaxial cable?

Accepted Answer

Trunk amplifier

Answer

Line extender amplifier

Answer

Bridger amplifier

Answer

Distribution amplifier

Question 6

What effect does cascading multiple amplifiers have on the noise figure of a cable distribution system?

Accepted Answer

Noise figure degrades as more amplifiers are added in cascade

Answer

Noise figure improves with each additional amplifier

Answer

Noise figure remains constant regardless of cascade depth

Answer

Noise figure is only affected by the last amplifier in the chain