NAB Technology & Digital Tools 3

Question 1

Which multiplexing scheme is used by ATSC 3.0 (NextGen TV) to improve spectral efficiency compared to ATSC 1.0?

Accepted Answer

OFDM

Answer

ATSC 3.0 uses OFDM (Orthogonal Frequency Division Multiplexing), which offers superior multipath rejection and enables mobile reception, unlike the 8-VSB used in ATSC 1.0.

Question 2

A station's master control operator notices audio levels are riding at -10 dBFS consistently. What is the likely result on air?

Accepted Answer

Audio that is too quiet for viewers

Answer

Operating 10 dB below full scale means the audio will sound noticeably quieter than properly leveled content, degrading the viewer experience.

Question 3

What is the function of a frame synchronizer in a broadcast facility?

Accepted Answer

Aligns incoming video to the facility's house sync

Answer

A frame synchronizer buffers incoming video and re-clocks it to match the facility's master sync, preventing frame tears when switching between asynchronous sources.

Question 4

Which protocol is the industry standard for low-latency contribution feeds from remote locations to a broadcast facility over the internet?

Accepted Answer

SRT (Secure Reliable Transport)

Answer

SRT (Secure Reliable Transport) is an open-source protocol designed for reliable, low-latency video transport over unpredictable public internet connections.

Question 5

In a modern newsroom, what does the term 'MOS' refer to?

Accepted Answer

Media Object Server

Answer

MOS (Media Object Server) is a protocol that enables communication between newsroom computer systems (NCS) and media production equipment like video servers.

(NAB) National Association of Broadcasters Certification Practice Test

(NAB) National Association of Broadcasters Certification Practice Test

NAB Technology & Digital Tools 3