CCTV System Components 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 CCTV System Components flashcards as text
What is the role of a video management system (VMS) in a large-scale IP CCTV installation?
Answer: Centrally manage, record, and retrieve video from multiple IP cameras and NVRs
A VMS is software that centralizes the control, recording, playback, and management of video from dozens or thousands of IP cameras across a network.
Which camera component determines how much light is needed to produce a usable image?
Answer: The image sensor sensitivity (measured in lux)
The image sensor's minimum illumination rating (in lux) indicates how little light is needed to capture a usable image — lower lux values mean better low-light performance.
A CCTV system uses a 'quad processor.' What does this device do?
Answer: Splits a monitor screen into four quadrants to display four cameras simultaneously
A quad processor divides a single monitor screen into four equal quadrants so that four camera feeds can be viewed simultaneously in real time.
What is the primary advantage of using fiber optic cable to transmit CCTV video signals?
Answer: Immunity to electromagnetic interference and ability to span very long distances
Fiber optic cable transmits light instead of electrical signals, making it immune to EMI/RFI and capable of carrying video over distances exceeding several kilometers without signal degradation.
In CCTV terminology, what does 'WDR' (Wide Dynamic Range) refer to?
Answer: A camera's ability to capture detail in both very bright and very dark areas simultaneously
WDR technology allows a camera to simultaneously expose for both bright and dark areas of a scene, preventing overexposed highlights and underexposed shadows.
What component in a PTZ camera system allows operators to store and recall specific camera positions?
Answer: Preset positions programmed into the PTZ controller
PTZ controllers allow operators to program preset positions — defined pan, tilt, and zoom coordinates — that can be recalled instantly with a single button press.
Which standard governs interoperability between IP cameras and NVRs from different manufacturers?
Answer: ONVIF
ONVIF (Open Network Video Interface Forum) is an industry standard that defines a common protocol so IP cameras and NVRs from different vendors can communicate and work together.