BDS Power Systems and Standby Powering 2

Question 1

What is the standard frequency of AC power delivered by HFC cable plant power supplies in the United States?

Accepted Answer

60 Hz

Answer

HFC cable plant power supplies in the U.S. operate at 60 Hz, matching the standard North American utility grid frequency.

Question 2

What is the purpose of output fusing in a cable plant power supply?

Accepted Answer

To protect the coaxial plant from damage due to overcurrent conditions

Answer

Output fuses open when current exceeds a safe level, protecting the coaxial cable and connected equipment from damage caused by shorts or excessive current draw.

Question 3

When measuring AC voltage on an energized coaxial cable in an HFC outside plant, which instrument should be used?

Accepted Answer

True RMS AC voltmeter rated for use on RF-carrying conductors

Answer

A true RMS voltmeter designed for RF-carrying coaxial cables accurately measures AC plant voltage while safely handling the simultaneous presence of RF and power signals.

Question 4

What is the typical maximum output current rating for a standard HFC outside plant power supply?

Accepted Answer

15-20 amperes

Answer

Standard HFC cable plant power supplies are typically rated at 15-20 amperes at 60-90V AC, providing enough current to power multiple active devices on a cable segment.

Question 5

What is a 'power hog' in the context of HFC cable plant powering?

Accepted Answer

An active device that draws significantly more current than its specification

Answer

A 'power hog' is an active field device such as an amplifier that draws more current than its rated specification, potentially overloading the power supply serving that segment.

BDS - Broadband Distribution Specialist Practice Test

BDS - Broadband Distribution Specialist Practice Test

BDS Power Systems and Standby Powering 2