Blue Book Chapter 3 Flashcards
How many splices are allowed in a run of coaxial video surveillance cabling
what is industry standard
5 max
industry standard is two
How do you eliminate lighting bloom
reposition camera or add more light in a different direction to even out lighting
What is the purpose of the camera lens
reflect light and refocus it into the camera sensor
what is a disadvantage of using a tinted dome
less light is let in
List some common sources of EMI
Florescent lights
motors
antennas
cable
PTZ
Pan-Tilt-Zoom Camera
What are two main methods for controlling PTZ cameras
digital and hardwire
keyboard and joystick
what is the most common voltage for full body cameras
24 VAC
what is the unit of measure for light sensitivity
lux or foot candle
What is the purpose of surge protection
Provide supplemental protection to CCTV equipment
What connector is industry standard for cctv Coax
BNC - Bayonet Neill–Concelman
ALC
automatic lens control - allows the camera to control auto iris lens
the five factors that determine the amount of recording time you will get out of your DVR/NVR are
Image record rate picture size image quality scene activity storage space
What is the most common type of BNC connector
compression
What are 4 types of BNC connectors
twist on
two piece crimp
three piece crimp
compression
what is the advantage of using a tinted dome
disguise the direction a camera is pointing
when is it safe to look down a fiber optic cable
when it is powered down or not connected to a lazer
What type of camera is more sensitive in low light condition
Black and white - more light is required to produce an accurate color image
what is the difference between general coverage and detail coverage
general covers a wide area while detail has a smaller coverage but more detail
when selecting a transformer, be sure that it has sufficient ___________ to power all devices
wattage: current and voltage
BLC
Back Light Compensation - dim light behind target increase light of target
List three alternate methods for video transmission
twisted (STP, UTP)
fiber
wireless
what are the distance limitations for passive baluns
under 1000 feet
What are advantages of using fiber optic cable
smaller and lighter
immune to lightning, RFI, EMI
can be in same cable tray as High voltage
no ground loop issues - electrically isolated
most secure
what are seven common camera types
Full body cam Bullet Cam Dome Cam Board Cam Covert Cam
what is the purpose of camera housing/domes
protect cameras from: tampering, the environment, and damage
hide the direction the camera is pointing
list the three common sixes and distance limitations for coax cable
RG-59: 500 FT
RG-6: 750 FT
RG-11: 1,500 FT
EMI
electromagnetic interferance
1 candle foot equals _____ lux
10 lux
AGC
automatic gain control - increase image sensitivity in low light situations
how do day/night cameras work
switch to blk/white when less than favorable light conditions occur
