CTS AV Signal Flow and Distribution 3

Question 1

What is 'ground loop hum' in an AV system and how is it typically resolved?

Accepted Answer

A low-frequency buzz caused by differing ground potentials, fixed with an isolation transformer or ground lift

Answer

High-frequency noise fixed by adding a filter capacitor

Answer

Video sync issues fixed by adjusting refresh rate

Answer

Feedback in microphones fixed by repositioning them

Question 2

In AV systems, what does 'gain structure' refer to?

Accepted Answer

Setting appropriate signal levels at each stage of the signal chain to maximize dynamic range and minimize noise

Answer

The physical rack height of amplifiers

Answer

The wattage rating of a power amplifier

Answer

The aspect ratio of a projected image

Question 3

Which standard defines the pinout and electrical characteristics for RS-232 serial control in AV systems?

Accepted Answer

EIA/TIA-232

Answer

ANSI/INFOCOMM 2M-2010

Answer

ISO 9001

Answer

IEEE 802.3

Question 4

What is the maximum recommended cable run for standard HDMI 2.0 without an extender or active cable?

Accepted Answer

15 feet

Answer

100 feet

Answer

50 feet

Answer

25 feet

Question 5

What does 'daisy chaining' mean in the context of AV signal distribution?

Accepted Answer

Passing a signal through multiple devices sequentially from one to the next

Answer

Connecting multiple cables in parallel to one source

Answer

Using decorative cable management

Answer

Linking multiple wireless transmitters together

Question 6

What is the function of a 'sync stripper' in a video signal distribution system?

Accepted Answer

Extracts the synchronization pulses from a composite video signal for use with other equipment

Answer

Removes copy protection from video signals

Answer

Increases video signal bandwidth

Answer

Converts progressive video to interlaced