CTS General Technology 5 — Questions and Answers
Question 1: What is the purpose of EDID in an HDMI connection?
- To encrypt content between source and display
- To allow the display to communicate its capabilities to the source device (Correct answer)
- To boost signal strength over long cable runs
- To convert digital audio to analog output
Correct answer: To allow the display to communicate its capabilities to the source device
EDID (Extended Display Identification Data) is a metadata standard that allows a display to describe its supported resolutions, refresh rates, and audio formats to the source.
Question 2: In digital audio, what does a higher bit depth provide?
- Higher sample rate
- Greater dynamic range (Correct answer)
- Lower latency
- Wider frequency response
Correct answer: Greater dynamic range
Bit depth determines the number of possible amplitude values per sample; more bits yield greater dynamic range and lower quantization noise.
Question 3: What does PoE stand for in network infrastructure?
- Port over Ethernet
- Power over Ethernet (Correct answer)
- Protocol over Ethernet
- Packet on Ethernet
Correct answer: Power over Ethernet
Power over Ethernet (PoE) allows network cables to carry electrical power alongside data, commonly used to power IP cameras, VoIP phones, and AV endpoints.
Question 4: Which type of microphone pickup pattern captures sound equally from all directions?
- Cardioid
- Hypercardioid
- Omnidirectional (Correct answer)
- Bidirectional
Correct answer: Omnidirectional
An omnidirectional microphone captures sound with equal sensitivity from all directions, making it useful for capturing ambient sound or room conversations.
Question 5: What is the function of a DSP (Digital Signal Processor) in an AV system?
- To convert HDMI to DisplayPort
- To process, route, and manipulate audio signals in real time (Correct answer)
- To distribute video signals to multiple displays
- To synchronize audio and video streams
Correct answer: To process, route, and manipulate audio signals in real time
A DSP performs real-time digital manipulation of audio signals, including equalization, compression, delay, and routing, replacing many analog components.
Question 6: In video, what does 'aspect ratio' describe?
- The number of pixels per inch on a display
- The proportional relationship between the width and height of an image (Correct answer)
- The refresh rate of a video signal
- The color depth of a video format
Correct answer: The proportional relationship between the width and height of an image
Aspect ratio describes the proportional relationship between an image's width and height, such as 16:9 for widescreen or 4:3 for standard definition.
Question 7: Which protocol is commonly used for real-time control of lighting and other stage equipment in live events?
- HDCP
- DMX512 (Correct answer)
- SIP
- AES67
Correct answer: DMX512
DMX512 is the standard digital communication protocol used for controlling stage lighting, dimmers, and special effects equipment in live event production.
CTS General Technology 5
What is the purpose of EDID in an HDMI connection?