BDS Signal Distribution and Amplification 2

Question 1

What is the typical input impedance of coaxial cable distribution equipment in a US cable broadband system?

Accepted Answer

75 ohms

Answer

50 ohms

Answer

100 ohms

Answer

120 ohms

Question 2

Which specification describes the maximum allowable level difference between the highest and lowest RF channels at an amplifier output?

Accepted Answer

Tilt

Answer

Slope

Answer

Gain

Answer

Response flatness

Question 3

A line extender amplifier is typically used in what part of the cable distribution network?

Accepted Answer

On feeder or distribution cables to extend reach to taps

Answer

At the headend to boost headend output

Answer

On the trunk cable between the headend and nodes

Answer

Inside the customer home to boost CPE signals

Question 4

What is the purpose of an automatic gain control (AGC) circuit in a cable amplifier?

Accepted Answer

To maintain a constant output level despite input level variations

Answer

To set the upstream return path gain

Answer

To equalize the frequency response across the passband

Answer

To reduce intermodulation distortion products

Question 5

Which type of splitter divides a cable signal equally between two output ports?

Accepted Answer

2-way splitter

Answer

Directional coupler

Answer

Diplexer

Answer

Attenuator

Question 6

What is the minimum acceptable CNR level typically required for acceptable QAM-256 signal quality in a US cable system?

Accepted Answer

33 dB

Answer

20 dB

Answer

27 dB

Answer

40 dB