Broadcast Systems & Equipment Flashcards
7 cards from real CBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Broadcast Systems & Equipment flashcards as text
In broadcast audio, what is an AES/EBU digital audio signal?
Answer: A serial digital audio standard for carrying two channels over a single balanced connection
AES/EBU (AES3) is a standard for serial digital audio transmission, carrying two channels (a stereo pair) over a single 110-ohm balanced XLR connection at professional quality.
What is the purpose of embedded audio in an SDI signal?
Answer: To carry audio channels within the video signal's ancillary data space, eliminating separate audio cables
SDI supports up to 16 channels of embedded audio in the ancillary data space (HANC/VANC), allowing a single coaxial cable to carry both video and audio.
What does the term 'playout' refer to in modern broadcast operations?
Answer: The automated transmission of pre-produced content from a server-based system to air
Playout describes the server-based automated broadcasting of scheduled content (programs, commercials, graphics) to air, replacing tape-based transmission.
What is the function of a comb filter in video processing?
Answer: To separate the luminance and chrominance components in a composite video signal
A comb filter separates the Y (luminance) and C (chrominance) components of composite NTSC/PAL video by exploiting the phase relationship between lines.
In broadcast infrastructure, what is the purpose of a patch bay (jackfield)?
Answer: To provide a centralized, flexible point for interconnecting and re-routing signals between equipment
A patch bay provides a normalized wiring point where signals flow through by default but can be easily re-routed by inserting patch cables for troubleshooting, maintenance, or special routing needs.
What is the significance of the vertical interval in a video signal for broadcast switching?
Answer: It is the blanking period between video frames, the preferred point to perform clean video switches
The vertical interval is the blanking period between frames; switching during this interval avoids visible glitches because no active picture data is being transmitted.
What is the role of a broadcast signal monitor (waveform monitor and vectorscope) during on-air operations?
Answer: To continuously measure and display video signal parameters so operators can verify levels and quality
Waveform monitors display luminance levels and sync integrity while vectorscopes show chrominance phase and amplitude, allowing operators to verify signals meet broadcast specifications.