CTS General 5 — Questions and Answers
Question 1: What is the primary purpose of an AV system 'block diagram' in a CTS project?
- To show the physical floor plan layout of equipment
- To illustrate signal flow and interconnections between system components (Correct answer)
- To list the bill of materials for procurement
- To document cable pull schedules and labor hours
Correct answer: To illustrate signal flow and interconnections between system components
A block diagram visually maps how signals travel between devices, making it essential for design review and troubleshooting.
Question 2: A presenter in a 200-seat auditorium needs to be heard clearly at the rear of the room. According to AVIXA standards, what is the minimum recommended speech intelligibility metric?
- STI (Speech Transmission Index) of 0.45
- STI of 0.60 (Correct answer)
- THD+N below 1%
- SNR above 10 dB
Correct answer: STI of 0.60
AVIXA's Projected Image System Contrast Ratio and related standards recommend an STI of 0.60 or higher for good speech intelligibility in presentation spaces.
Question 3: Which video signal format carries the synchronization information on the green channel?
- Component video (YPbPr)
- Composite video
- Sync-on-green (SOG) (Correct answer)
- S-Video
Correct answer: Sync-on-green (SOG)
Sync-on-green embeds the horizontal and vertical sync pulses within the green channel of an RGB signal, eliminating the need for a separate sync wire.
Question 4: An AV designer needs to ensure that all participants in a video conference can see facial details clearly. What minimum camera angle of view and resolution combination is generally recommended for a 12-person boardroom table?
- Wide-angle 4K PTZ camera (Correct answer)
- Narrow fixed-lens 720p camera
- Fixed 1080p camera with 90° field of view
- Omnidirectional fisheye camera at 4K
Correct answer: Wide-angle 4K PTZ camera
A wide-angle 4K PTZ camera provides the flexibility to capture the full table while delivering sufficient resolution to resolve facial detail.
Question 5: What is the function of a digital signal processor (DSP) in a professional AV audio system?
- Converting analog audio signals to optical fiber transmission
- Providing real-time equalization, delay, compression, and routing of audio signals (Correct answer)
- Amplifying audio signals to loudspeaker power levels
- Converting balanced to unbalanced audio connections
Correct answer: Providing real-time equalization, delay, compression, and routing of audio signals
A DSP performs signal processing tasks such as EQ, delay alignment, dynamic compression, and matrix routing to optimize audio performance.
Question 6: A CTS technician is terminating a Cat6 cable for HDBaseT. Which wiring standard should be used?
- T568A on both ends
- T568B on both ends
- T568A on one end and T568B on the other (crossover)
- Any consistent standard as long as both ends match (Correct answer)
Correct answer: Any consistent standard as long as both ends match
HDBaseT is polarity- and pair-independent, so any consistent wiring standard (T568A or T568B) applied to both ends will work correctly.
Question 7: During an AV needs analysis, a client says they want a 'collaborative' meeting room. Which feature set BEST addresses this requirement?
- Fixed presentation display with a single HDMI input
- Wireless screen sharing, multiple displays, and interactive touch capability (Correct answer)
- High-lumen projector with a 150-inch fixed screen
- Surround sound audio system with Dolby Atmos decoding
Correct answer: Wireless screen sharing, multiple displays, and interactive touch capability
Wireless sharing, multiple screens, and touch interactivity directly enable the ad-hoc, multi-participant collaboration clients mean by 'collaborative' spaces.
CTS General 5
What is the primary purpose of an AV system 'block diagram' in a CTS project?