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197 Cards in this Set
- Front
- Back
- 3rd side (hint)
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CCD |
Charge coupled device |
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CMOS |
Complimentary metal oxide semiconductor |
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ICCD |
Intensified charge coupled device |
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One of the most significant technological advancements for video purposes in the early 1980's was the CRT ( cathode ray tube ) monitor. |
False |
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Video is an effective means for deterring crimes, protecting assets, and apprehending and prosecuting offenders |
True |
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CCTV systems, in the broadest sense, Provide remote eyes for the security operator |
True |
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Security investigators can use video devices for safeguarding company assets and preventing theft by utilizing small, covert CCTV devices. |
True |
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Color cameras are not as reliable as monochrome cameras due to low picture quality and the inability to accurately identify personnel and objects being recorded |
False |
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Video systems often only provide delayed assessments of personal location and availability in the event of an emergency or disaster |
False |
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In a perimeter protection role, video is used along with intrusion-detection alarm devices and video motion detection to alert the guard at the security console when an unauthorized intrusion has occurred |
True |
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The solid state camera is superior to its predecessor, the tube camera, because it is smaller in size uses less power to operate and has excellent color rendering properties |
True |
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The function of the CCTV camera sensor is to collect reflected light from the scene and focus it onto the lens |
False |
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Manual, sequential, homing And alarming are 4 basic types of switching devices |
True |
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UTP is quickly becoming the most popular method of transmission for video systems over coaxial cabling systems even though coaxial cabling is less expensive and can be used over longer distances than UTP |
False |
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ICCD and IR cameras provide lower sensitivity and detection capabilities in low light level applications as compared to other camera types |
False |
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Natural and artificial are 2 broad categories of heat and light sources |
True |
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To fully utilize a zoom lens, it should be mounted on an ocular frame so that the lens can be pointed in almost any direction |
False |
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When a camera is required to adjust to large light level ranges in most outdoor applications, either a shuttered CCD or automatic Iris control lens is utilized |
True |
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Whenever possible, cameras should be pointed towards the Sun for external light sources to assist with glare control and illumination of the images being recorded |
False |
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One video frame is composed of 4 fields |
False |
2 |
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Digital signal processing (DSP) has been the driving force behind the migration to digital video |
True |
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The 2 basic types of compression techniques are horizontal and vertical |
False |
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Though digital cameras are the most common type of security devices being utilized today, analog systems were considered "smart" cameras as well |
False |
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Aluminum shield type cable should not be used for CCTV applications because that type of cable has a lower resistance and will distort horizontal synchronization pulses |
False |
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A few common methods for scrambling video signals would be to either utilize negative signals, move the horizontal lines, or altering/removing the synchronization pulses |
True |
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The 4 types of coaxial cabling available for video transmission systems include 124 Ω twin-axial balanced indoor cable and 75 Ω unbalanced outdoor cable among others |
True |
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The 2 most common types of coaxial cable used in video security applications are the RG-59 and RG-6 |
False |
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If aluminum shield cabling should not be used for a video security installation, the type of cable that should be chosen for optimal performance is a cable that has a 90% copper shield or copper clad center conductor |
False |
95% |
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The 3 types of DVI include DVI - A, DVI - D, and DVI-R |
False |
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8 bits make a byte |
True |
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Compact discs, DAT recorders, and HD drives are all pieces of equipment which could be used to record for longer periods of time or for archiving purposes |
True |
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MPEG compression allows for 3 types of frames including I frame, B frame, and P frame |
True |
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Most quad systems have a feature that allows a displayed image on the monitor to be "frozen" allowing for further detailed examination |
True |
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Synchronous and non-synchronous are 2 types of video signals which are not switched |
False |
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Video multiplexing is an example of superior format multiplexing |
False |
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A quad or multiplexer is an electronic device that time-multiplexes video pictures from many cameras onto one video display or video recorder |
True |
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A quad splitter can display images in either quad or full screen format but not while recording to a DVR or NVR and quad format |
False |
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Analog matrix switches route single analog video sources to a single video destination by converting them to a modified digital image |
False |
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An encoder/decoder is used by multiplexers to identify each of the incoming video camera signals for processing |
True |
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A DMVD effectively controls the situation by providing a video output to record all alarmed camera images |
True |
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A VMD device will generate an alarm to notify security personnel or to activate a video recorder if the picture changes by the prescribed amount |
True |
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The microprocessor DSP - based DVMD can analyze thousands of pictures zones and operate with low false alarm rates except when in the presence of severe light level changes |
False |
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The DVMD has the ability to remove the presence of constant motion in regards to environmental elements from the scene without triggering an alarm |
True |
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An isolated camera is a plug and play surveillance device including the lens, camera and any internal wiring required for operation, which comes mounted in a small housing ready for installation |
False |
Integrated |
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Mechanical stops are utilized on Pan-tilt platforms at the end of the horizontal and vertical panning ranges to prevent the wiring inside from getting twisted or being damaged |
True |
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Some fixed domes with fixed lenses may have a Pan/tilt adjustment which would need to be adjusted during installation |
True |
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The advantage of having a smoke or tinted lens is so the amount of light allowed into the camera is minimalized for optimal viewing of images in the control Room |
False |
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Special motors with lower temperature insulation on their windings are often required for desert or tropical locations where temperatures may reach a 130ﾟF |
False |
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The 3 primary applications for Pan/tilt units are for monitoring a fixed point site, an area site, and a volume site |
True |
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A mechanical stop out of adjustment will cause the motor to drive the unit beyond its end travel and continue driving causing damage to the motor and gear train |
True |
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With modern electronic control systems, the security operator can Pan, tilt and zoom to a particular location and set parameters for the system to memorize as a preset combination thus eliminating the requirement for a unique code to be assigned for that specific condition |
True |
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Powerline disturbance is any irregularity, disturbance, or interruption induced upon or along CCTV system cabling from cameras back to the equipment Room |
False |
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Electrical noise is an unwanted electrical signal |
True |
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In most security installations, the low - power video equipment is connected in series across the power source |
False |
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DC power supplies should have fuses or thermal circuit breakers installed to protect the equipment in case of electrical failure |
True |
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A voltage surge is a temporary rise in the voltage amplitude on a power line that lasts at least 1 - half cycle or 1 and 120th of a second For a 60 Hz system |
True |
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Storm induced voltage spikes is the most common form of electrical power irregularity that causes damage to sensitive CCTV equipment every year |
True |
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The 3 most common short-arc lamps are Mercury, Mercury - xenon, and xenon |
False |
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The 3 most popular HID (high intensity discharge) lamps include Mercury in a quartz tube, metal halide in a quartz tube, and low pressure sodium in a translucent aluminum - oxide tube |
False |
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When designing a lighting layout for CCTV applications, one must consider installation cost, efficiency of the lamp to be used, and the cost of operation among other things |
True |
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The primary overriding advantages of HID lamps over many other lamps include both long life and high efficacy |
True |
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Factors that determine the cost of lighting an outdoor or indoor area include additional installation cost, maintenance requirements, and operating cost |
True |
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Analog signals began to degrade when reproductions or multiple generations (copies of copies) are required |
True |
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An IP compliant network camera contains a lens, video imaging chip, resolution chip, and a computer |
False |
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Wifi networks are comprised of 2 basic components; wifi radios and access points, or getaways |
True |
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The IEEE 802.11 standards 2 basic categories include protocols for the complete Wi-Fi system and extensions for addressing weaknesses |
False |
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The 3 main functions of remote video surveillance include play back, recording, and remote control of equipment |
True |
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Due to the unusually higher cost associated, the slowest growing segment of the video security industry is networked or ip addressable cameras and associated equipment |
False |
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A true MIMO system requires only one antenna working simultaneously on 2 separate channels |
False |
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Almost all pinhole lenses invert the video picture so the camera must be inverted as well to get a normal right side up image |
True |
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Coherent means that each point in the image on the front end of the fiber bundle corresponds to random point at the rear end of the fiber bundle |
False |
Specific |
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An image intensifire is any device that amplifies and produces an output image that is brighter than its input image |
True |
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Blooming becomes a problem with SIT tubes when light intensity exceeds normal operating levels by a factor of approximately 100 |
False |
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"Lag" is defined as the residual picture scene or signal measured in the dark and expressed as the percentage of the original signal present after 10 television fields (10 × 160th of a second equals 1/6 of a second) of scanning in the dark |
False |
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The reason that thermal IR cameras have lower image quality than other cameras is because there are many more pixels in the sensor resulting in higher resolution |
False |
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A safety and/or security plan should contain provisions for access control, intrusion detection, video assessment, fire detection and. |
Full 2-way communication |
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Video monitoring allows the security personnel to be but also improves security by permitting the camera scene to be transmitted to other control centers or personnel |
More effective |
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In order to minimize installation time for covert camera installations, the signal transmission method most often used is |
Wireless |
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Most monochrome cameras being used for low - light applications are sugmented with |
Active IR illuminators |
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The integration of and security personnel increases the overall security asset protection and employee safety within a facility |
All of the above |
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What is the most commonly used aspect ratio for video security systems? |
4 x 3 (4H x 3W) |
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Almost all cameras scan the scene as a function of time |
Point by point |
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Video monitors can be divided into categories including |
All of the above |
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The rule of thumb for FOV States that for a given Lens, angular FOV for larger sensors and for smaller sensor sizes |
Increases, decreases |
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The most common type of lens used in video security applications is |
Fixed focal length |
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The most common type of lens used when space is limited behind a wall is |
Right angle lens |
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The Of the optics determines the light gathering ability of the Lenz |
Diameter |
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Sensitivity of a camera is measured in |
Foot candles |
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Thermal imaging systems respond exclusively to |
Heat |
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This type of camera operates better in lower light level conditions |
CCD |
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This type of charge - transfer device is reserved primarily for military applications |
CID |
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Analog cameras generate what type of video signal? |
Base-band |
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When several video signals are combined on a single communications channel and transmitted to a monitor location, it is called |
Multiplexing |
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The most troublesome and noticeable video cabling problem by far is |
Ground loops |
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The clarity of fiber optic transmitted images is now limited by the camera, monitoring equipment and |
Terminations |
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The standard resolution in the video industry is |
1024 x 768 |
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The 3 most common types of flat panel displays include LCD, OLED, and |
Plasma |
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The 3 display formats used by most digital flat screen monitors are raster graphics, digital image, and |
Bitmap |
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The 2 types of LCD technology which are currently being used include transmissive and |
Reflective |
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A networked PC with software applications that control the flow of digital video data is |
NVR |
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The multi-channel DVR technology requires significantly more HD drives and error correcting codes to reliably store and the images |
Manipulate |
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A multi-channel DVR can store how many images per second |
60 |
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The IDE HD drives found in recording devices provide storage in which range |
Terabyte |
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For controlling camera functions, the transmission protocols most commonly utilized by medium to large scale matrix systems are RS-232, RS-422, and |
RS-485 |
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The 3 generic types of multiplexers used are simplex, duplex, and |
Triplex |
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Most multiplexers can display the video cameras in 4 different configurations including quad ( 4 way ), 10 way, 16 way, and |
9 way |
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Early multiplexers were basically that could mark each camera with a unique ID number in the vertical interval |
Video switchers |
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The use of video multiplexers eliminates the normal video time gaps created by conventional sequential switches which usually resulted in a dead time of |
2-3 seconds |
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The type of multiplexer that allows for the viewing of live and recorded images on one monitor simultaneously, eliminating the need for a separate playback monitor is a |
Triplex multiplexer |
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VMD units can have a that stores information about the unique movement and pattern of particular objects such as ripples on water or birds |
Library |
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The typical described percentage of change needed for a AVMD to trigger an alarm is |
10-25% |
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The AVMD operates by the analog video signal from the camera and determining whether the scene has changed |
Analyzing |
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The size for domes used on both interior and exterior cameras range from |
5-15 inches |
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What percentage of lights does the smoked dome assembly lose |
30% |
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A heater in a camera housing is used to keep the lens and camera about |
45-55 ﾟF |
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The maximum distance which a camera can be controlled using 18 AWG STP and the AD Manchester control protocol is |
5000' |
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A large warehouse area where a great deal of space is being surveyed would benefit from the inclusion of Pan/tilt units and would be an example of what type of scene |
Volume |
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A cash register at the casino cashier's window being observed would benefit from the inclusion of pan/tilt units and would be an example of what type of scene |
Fixed point |
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The most commonly problematic components within a Pan/tilt mechanism include kinked cabling, burned - out motors, failed gear trains, and |
Broken mechanical stops |
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The most common transmission protocol used to carry two-wire communications to Pan/tilt mechanisms over long distances is |
RS-422 and RS-485 |
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The most common transmission protocol used to carry two-wire communications to Pan/tilt mechanisms over short distances is |
RS-232 |
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Many video installations utilize equipment operating at rather than 120 VAC |
24 VAC |
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What can be used to gain independence from the less than perfect AC power services available from utility power providers |
UPS |
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What can be used to make sure that CCTV equipment is fully protected from voltage surges and sags by eliminating nuisance switching back-and-forth to batteries, thus increasing battery life for blackout conditions |
Line interactive UPS system |
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An important aspect of the electrical distribution system is the use of good grounding practices and the elimination or avoidance of in the system |
Ground loops |
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The advantage that high pressure sodium lamps have over virtually all other lamps is |
High efficacy |
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The quality and quantity of the intelligence captured within a CCTV system is directly affected by the |
Amount of light available |
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An object that is hot enough to glow is said to be |
Incandescent |
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Why are low pressure Sodium lamps the preferred lighting source for monochrome (black-and-white) camera installations |
More contrast |
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In CCTV installations, the 2 most common types of lamps used for artificial lighting are tungsten/tungsten-halogen and |
Gaseous/arc lamps |
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An important aspect of artificial lighting is the consideration of the light - beam pattern from the lamp and the camera lens |
Field of view (FOV) |
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When neighboring pixels within a video frame appear to be closer to the same value (in both brightness and color) then farther apart in respect to those qualities is called |
Spatial redundancy |
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A key component to the wireless digital transmission means is a technology called |
Spread spectrum modulation |
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Due to the enormous size of the file to be sent, a digital video signal must be before it is able to be sent across limited bandwidth sized copper conductor networks |
Compressed |
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Regarless of the size of the file to be sent, a digital video signal need to be compressed before it is able to be sent across larger bandwidth sized fiber optic networks |
Does not |
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To provide connectivity between 2 locations and simpler systems where only a single camera or sensor and a single monitoring location is used and only 1 to 1 camera control functions are required, the type of wireless video transmission used is called |
Point to point |
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The technology used for wired ethernet LANs that allows the electrical power necesarry for the operation of each device to be carried by a pair of wires on the data cable as opposed to a separate power cable is called |
POE |
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If each viewer will require their own video stream, a unicast signal is sent from the source to the viewer as a |
Stand alone stream |
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Since POE equipment uses safety extra low - voltage (SELV), which provides additional safety factors for sensitive electrical equipment, the operational voltage of POE equipment is |
48 VDC |
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SELV |
Safety extra low-voltage |
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Since POE equipment uses a safety extra low-voltage (SELV), which provides additional safety factors for sensitive electrical equipment, this has the capability of powering loads rated to |
13 Watts |
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The total time it takes for a frame to travel from a sender to a receiver is |
Latency |
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In both legacy analog and newer digital video surveillance systems, the criteria for image quality includes resolution, frame rate, and |
Color rendition |
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A viewing system in which a long thin tube housing with multiple relay lenses is used to view inside objects (such as safes) or through barriers is called a |
Bore scope lens |
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A Mini - lens used for covert surveillance when space is at a premium is called a |
Small FFL objective lens |
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A type of pinhole lens and camera used for covert security applications is called a |
All of the above |
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A lens used for a difficult covert video surveillance application where small cameras and even many - pinhole lenses will not work is called a |
Coherent fiber - optic bundle lens |
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In many applications, the dealer does not know in advance the required focal length and configuration required for all covert system installations, so what can be used to eliminate stocking a large assortment of pinhole lenses |
Pinhole lens kit |
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The 2 most common types of GEN 2 image intensifiers are Electron - focusing and |
Proximity - focused |
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The photocathode sensitivity of an image - intensifier is expressed in luminous sensitivity and |
Radient sensitivity |
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Thermal IR imagers use lenses made from germanium, calcium fluoride, and |
Zinc selenide |
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Micro - cantilever technology uses rather than resistance to measure temperature change |
Capacitance |
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The resolution of photographic film, intensifiers, and other non - scanning imaging tubes is measured by its |
Modulation transfer function (MTF) |
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Many video applications can be "broadly" categorized by one of the following 2 types |
Indoor and outdoor |
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List 3 different locations where CCTV measures are utilized for public safety reasons |
Hospitals, traffic monitoring, and airports |
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What are the 2 scanning methods used in the camera and monitor video scanning process |
Raster, and progressive scanning |
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List the 4 items required to make a simple video system work |
Camera, lens, monitor, and transmission |
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List 2 basic types of monitor screens used in video Security systems |
Cathode ray tube - CRT Liquid crystal display - LCD |
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Define one FT - Cd of illumination |
Amount of light received from a 1 - candela source at a distance of 1' |
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Name 2 types of automatic Iris lenses |
Direct drive and video drive |
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The most prominent and widely used sensor types for video security applications are |
CCD CMOS ICCD Thermal IR |
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Thermal IR |
Thermal infared |
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List the 3 component parts which make a color video signal |
Luminance, hue, and saturation |
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CCTV |
Closed circuit television |
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List 2 types of BNC connectors recommended for video signal transmission |
Solder and crimp-on |
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One of the greatest benefits of the LED display over LCD displays is that the LED displays do not require a to function |
Back light |
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A represents the smallest resolution element made up in the monitor picture and are usually classified by either red, green, blue, and sometimes yellow |
Pixel |
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The amount of image detail which can be displayed on either an analog or digital display is referred to as the image |
Resolution |
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The 2 most generic optical storage systems available are |
Non - erasable and erasable |
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List below the 5 most basics switcher types used in small to medium video security systems |
Manual Homing Bridging Looping Alarming |
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List the 2 factors that influence how smoothly a monitor picture switches from camera to camera |
Type of signals to be switched, synchronous or non - synchronous Switching action itself, the time within the video signal in which the switchover occurs |
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The DVMD allows the user to divide the monitors scene into small detection areas called windows and in some cases, even smaller areas going down to the level |
Pixel |
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What are the 2 generic options available in many VMD's |
Detection of motion Detection of the presence or absence of an object |
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DVMD stands for |
Digital video motion detectors |
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AVMD Stands for |
Analog video motion detector |
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List the 4 standard shapes and forms available for camera housings |
Dome Triangular Wedge Rectangular |
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What type of gas is purged into an explosion - proof housing |
Inert dry nitrogen |
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The 4 most common techniques (methods) utilized for the console controller to communicate with and control remote movable speed - dome cameras are |
Directive UTP Single coax Wireless |
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The 2 primary functions of a camera housing is to protect the camera and lens against |
Vandalism, and the environment |
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The optical - coupler consists of a and to transmit the signal information rather than a metal slip ring assembly |
Light transmitter Light receiver |
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A Pan/tilt camera platform is necessary when expected activity is anywhere in both a and location |
Horizontal and vertical |
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What are the 2 Pan/tilt camera mount configurations |
Panning Panning and tilting |
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The force exerted on the camera housing assembly and Pan/tilt mechanism that can cause it to move or rotate in an unwanted direction or cause vibration is |
Wind |
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List the 2 types of power sources that can be utilized to operate CCTV equipment |
AC and DC |
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The rated voltage listed is the voltage |
Ideal |
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Utility companies usually supply this voltage with a tolerance of +/- % of the voltage and +/- 1 or 2 Hz |
10 % |
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How is the power delivering capability of a battery sized |
Amp hours |
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List 2 of the 4 discussed causes of exccessive noise in either the picture or recorded signals within the CCTV system |
Voltage spikes and cross talk |
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In addition to the energy requirements, the spacing between lamps, height of the installed picture above the surface to be illuminated, and the physical and of the lamp must be considered when choosing cameras for a specific CCTV application |
Size/shape Height |
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The 3 main items that the image quality of a video signal is dependent on include |
Resolution Frame rate Color rendition |
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The 2 types of spread spectrum radio include |
Direct sequence Frequency hopping |
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The 2 most common methods utilized for supplying power on ethernet networks is by using either a or . |
POE switch or POE injector |
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The QoS is defined as control of 4 network categories. List them below |
Bandwidth Latency Jitter Traffic loss |
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What type of surveillance is installed in full view of the public |
Overt |
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What type of surveillance operates so that the offender is not aware of the surveillance |
Covert |
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Most night time surveillance devices designed to work in near - dark conditions are classified as |
Intensifiers |
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The 2 types of night viewing systems can be separated into either passive systems or |
Active systems |
|
