Practice Test Geeks(CTS) Certified Technology Specialist Practice Test
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General Flashcards

6 cards from real CTS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the purpose of a sync-on-green (SOG) video signal format?

    Answer: To embed horizontal and vertical sync pulses within the green channel of a component video signal, reducing the number of required cables

    Sync-on-green (SOG) is a component video format where H/V sync information is embedded in the green signal, allowing a 3-cable (RGB) connection instead of 5 cables (RGB + H-sync + V-sync). It is common in professional video equipment and some workstations.

  2. In a Dante audio-over-IP network, what is the recommended network topology for reliable, low-latency performance?

    Answer: Dedicated gigabit Ethernet network with managed switches supporting QoS/DSCP prioritization

    Dante requires a dedicated or VLAN-isolated gigabit Ethernet network with managed switches that support DSCP (QoS) packet prioritization. This ensures consistent sub-millisecond latency and prevents audio dropouts from competing network traffic.

  3. What is the CRI (Color Rendering Index) and why is it relevant to AV lighting design?

    Answer: A scale from 0–100 measuring how accurately a light source renders colors compared to natural light; high CRI is required for accurate color-critical AV environments

    CRI rates a light source's ability to render colors accurately relative to a reference illuminant (0 = completely distorted, 100 = perfect). For AV environments with video production, post-production, or color-critical displays, a CRI of 90+ is typically required.

  4. What is the purpose of a termination resistor in an RS-232 or RS-485 control network?

    Answer: RS-232 does not use termination; RS-485 uses a 120-ohm termination resistor at each end of the bus to absorb signal reflections and ensure reliable data transmission

    RS-485 is a balanced differential bus; at high baud rates or long cable runs, unterminated lines produce signal reflections that cause data errors. A 120-ohm resistor (matching the cable's characteristic impedance) at each bus end absorbs reflections.

  5. What is the difference between balanced and unbalanced audio connections, and which is preferred for long cable runs?

    Answer: Balanced uses two conductors plus a shield (XLR/TRS) and employs common-mode rejection to cancel noise; it is preferred for long cable runs

    Balanced connections carry the signal on two conductors (hot and cold, with inverted polarity) plus a shield. At the receiving end, common-mode rejection (CMRR) cancels noise picked up equally on both conductors, making balanced connections far superior for long runs in electrically noisy environments.

  6. According to AVIXA standards, what is the minimum horizontal illuminance (in lux) recommended for a videoconferencing room to ensure adequate facial visibility on camera?

    Answer: 200 lux

    AVIXA recommends a minimum horizontal illuminance of approximately 200 lux (with some standards citing 300–500 lux for professional environments) on participants' faces for adequate camera exposure in videoconferencing rooms.