RCDD Audiovisual Systems Infrastructure 2

Question 1

Under ANSI/INFOCOMM 3M-2011, what minimum projected image contrast ratio is required for analytical decision making content?

Accepted Answer

80:1

Answer

ANSI/INFOCOMM 3M-2011 sets 80:1 for analytical decision making, the strictest of its four viewing categories.

Question 2

A projector has a throw ratio of 1.5:1 and the screen image is 3 m (10 ft) wide. What is the approximate throw distance?

Accepted Answer

4.5 m (15 ft)

Answer

Throw distance = throw ratio × image width, so 1.5 × 3 m = 4.5 m.

Question 3

Which ANSI/AVIXA standard replaced the old 4/6/8 rule as the method for sizing displays to the content and the farthest viewer?

Accepted Answer

ANSI/AVIXA V202.01 (DISCAS)

Answer

V202.01, the Display Image Size for 2D Content in Audiovisual Systems (DISCAS) standard, sizes displays from the content's element height and the farthest viewer's distance.

Question 4

What is the maximum HDBaseT link length over a single twisted-pair cable, such as Category 6A?

Accepted Answer

100 m (328 ft)

Answer

HDBaseT supports 100 m over category twisted-pair cabling, the same as the Ethernet channel limit.

Question 5

Why should microphone-level cables be kept physically separated from loudspeaker-level cables in AV pathways?

Accepted Answer

To stop crosstalk from the high-level speaker signal into the very low-level mic signal

Answer

Mic signals are tens of dB lower than speaker-level signals, so running them together lets the speaker signal couple in as audible crosstalk.

RCDD - Registered Communications Distribution Designer Practice Test

RCDD - Registered Communications Distribution Designer Practice Test

RCDD Audiovisual Systems Infrastructure 2