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Knowledge Flashcards

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

Read the first 7 Knowledge flashcards as text

  1. What does the term 'field of view' (FOV) refer to in CCTV systems?

    Answer: The angular extent of the observable area captured by the camera lens

    Field of view is the angular extent of the scene that a camera lens can capture, typically measured in degrees horizontally and vertically.

  2. Which IP camera standard defines interoperability between cameras and video management systems from different manufacturers?

    Answer: ONVIF

    ONVIF (Open Network Video Interface Forum) is the industry standard that ensures interoperability between IP-based security products from different manufacturers.

  3. What is the primary purpose of a video motion detection (VMD) feature in a DVR or NVR?

    Answer: To trigger recording or alerts when movement is detected in the video frame

    Video motion detection analyzes pixel changes within a video frame and triggers recording, alarms, or notifications when movement is detected.

  4. In CCTV terminology, what is 'dwell time'?

    Answer: The duration each camera channel is displayed before the multiplexer switches to the next

    Dwell time is the length of time each camera image is displayed on a monitor before a multiplexer or switcher cycles to the next camera.

  5. What does 'WDR' stand for, and why is it important for CCTV cameras?

    Answer: Wide Dynamic Range — allows cameras to capture detail in both bright and dark areas simultaneously

    Wide Dynamic Range (WDR) technology allows cameras to produce clear images in scenes with both very bright and very dark areas, such as entrances with backlit subjects.

  6. Which cable type is most commonly used for traditional analog CCTV camera installations?

    Answer: RG-59 coaxial cable

    RG-59 coaxial cable is the standard cable used for transmitting analog video signals in traditional CCTV installations.

  7. What is the function of an OSD (On-Screen Display) menu in a CCTV camera?

    Answer: To allow configuration of camera settings such as brightness, white balance, and exposure directly on the monitor

    The OSD menu allows installers and operators to configure camera parameters like brightness, contrast, and white balance directly through the camera's video output.