Practice Test Geeks(VDV) Voice Data Video Technician Certified Practice Test
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Video Distribution Flashcards

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

Read the first 7 Video Distribution flashcards as text

  1. What is the purpose of an EDID (Extended Display Identification Data) in an HDMI distribution system?

    Answer: Communicate display capabilities to the video source

    EDID is a data structure that a display sends to the source device describing its supported resolutions, refresh rates, and audio formats so the source can output compatible signals.

  2. In a structured cabling environment, which TIA/EIA standard governs the installation of coaxial cable for video applications?

    Answer: TIA-570

    TIA-570 is the Residential Telecommunications Cabling Standard that covers coaxial and twisted-pair cabling for video, voice, and data in residential and light commercial buildings.

  3. What is the video bandwidth required for a standard definition NTSC composite video signal?

    Answer: 4.2 MHz

    NTSC composite video has a maximum luminance bandwidth of 4.2 MHz, which defines the cabling and amplifier requirements for SD video distribution.

  4. A technician measures 0.3 Vp-p on a composite video signal that should be 1.0 Vp-p. What is the most likely cause?

    Answer: Excessive cable attenuation or a missing DA

    A drastically low signal level indicates cable loss has not been compensated, or a required distribution amplifier is absent from the signal path.

  5. Which video format carries both video and audio over a single cable using a BNC connector?

    Answer: SDI (Serial Digital Interface)

    SDI carries uncompressed digital video with embedded audio channels multiplexed into the serial bitstream over a single 75-ohm coaxial cable with BNC connectors.

  6. What is the bit rate of HD-SDI used in 1080i/720p video distribution?

    Answer: 1.485 Gbps

    HD-SDI operates at 1.485 Gbps (or 1.4835 Gbps for integer frame rates), supporting 720p60 and 1080i60 uncompressed video with embedded audio.

  7. When routing video signals through a building's conduit, what minimum bend radius should be maintained for RG-6 coaxial cable?

    Answer: 6 inches

    RG-6 coaxial cable requires a minimum bend radius of approximately 6 inches (10× the cable diameter) to prevent deformation of the dielectric and impedance changes.