CCTV CCTV Power and Cabling Infrastructure 2

Question 1

What is the maximum cable length for a standard Cat6 Ethernet run used for IP CCTV cameras?

Accepted Answer

100 meters

Answer

50 meters

Answer

250 meters

Answer

500 meters

Question 2

What device is used to extend IP camera cable runs beyond the 100-meter Ethernet limit?

Accepted Answer

Ethernet switch or media converter

Answer

Video balun

Answer

Video amplifier

Answer

Coax splitter

Question 3

What is a 'video balun' used for in CCTV installations?

Accepted Answer

Transmitting video over UTP (twisted pair) cable instead of coax

Answer

Converting between PAL and NTSC video formats

Answer

Amplifying weak video signals over long distances

Answer

Converting analog video to IP format

Question 4

Which grounding issue commonly causes 'hum bars' (horizontal rolling lines) in analog CCTV footage?

Accepted Answer

Ground loop interference between equipment at different potentials

Answer

Overloaded PoE switch ports

Answer

Incorrect frame rate settings on the DVR

Answer

Excessive cable length without amplification

Question 5

What does 'conduit fill ratio' refer to in CCTV cable installation planning?

Accepted Answer

The percentage of a conduit's cross-sectional area occupied by cables

Answer

The ratio of shielded to unshielded cables in a run

Answer

The number of splices per conduit length

Answer

The proportion of power to data cables in shared routing

Question 6

What is the advantage of using fiber optic cable for long-distance CCTV camera runs?

Accepted Answer

It is immune to electromagnetic interference and supports very long runs

Answer

It is cheaper than coaxial cable

Answer

It natively supports PoE power delivery

Answer

It requires no transceivers at either end