BlueBook Chapter 3

Question 1

How do day/night cameras work?

Answer 1

Produce video in color under favorable lighting conditions and switches over to black and white when lighting gets too low for color.

Question 2

List the three common sizes and distance limitations for coax cable.

Answer 2

RG59 - up to 500ft.
RG6 - up to 750ft (needs to be copper braided.
RG11 - up to 1500ft

Question 3

What are the four types of BNC connectors

Answer 3

1 - Twist on BNC - least reliable.
2 - 2-piece crimp BNC - more reliable, makes better connection, requires special tool.
3 - 3-piece crimp BNC - most reliable, strong physical connection, most time consuming.
4 - Compression connectors - best connection for CCTV, easy to install.

Question 4

The five factors that determine the amount of recording time you will get out of your DVR/NVR are:

Answer 4

Image Record Rate - number of images recorded per second.
Picture Size - larger pictures require more space.
Image Quality - larger and quality images require more space. The less quality, the less space.
Scene Activity - changes picture size due to moving camera or scenery.
Storage Space - amount of space available

Question 5

The term bandwidth is used to describe what?

Answer 5

The amount of info a network can transmit and receive at one time.

Question 6

What protocol is used for transferring data between computers on a network?

Answer 6

TCP/IP

Question 7

How does network video differ from standard CCTV?

Answer 7

It utilizes cameras or devices with ethernet outputs that send the video signal over the computer network.

Question 8

What makes a camera a “network camera”?

Answer 8

It has a built-in ethernet connection.

Question 9

What is the main difference between a standard DVR and a hybrid DVR?

Answer 9

Hybrid DVR’s can record from IP addressable cameras connects to a network and permit the reception of both analog and digital video signals. They also have the capability of recording and storing signals from both sources.

Question 10

What affects can be expected if the network video equipment consumes too much of the available network bandwidth?

Answer 10

Slowing in network speeds, system crashes.

Question 11

How are inputs and outputs used?

Answer 11

They allow the network transmitter to receive control signals from remote locations and allow the transmitter to send signals to other locations over the network, programmable

Question 12

List three alternate methods of video transmission.

Answer 12

Twisted pair
Fiber optics
Wireless

Question 13

The purpose of a network is to:

Answer 13

Two or more PC’s connected together for the purpose of sharing data, peripherals and resources.

Question 14

What is the difference between a hub and a router?

Answer 14

A hub serves as a switching and control point for all devices connected to the network - it routes signals from one device to another device.
A router allows devices using different communication protocols to communication with each other - used to allow a network to access the internet.

Question 15

What information is contained in the MAC address?

Answer 15

Hardware manufacturer, model number and device’s individual ID #

Question 16

POE camera use how many volts?

Answer 16

48V (power of ethernet)

Question 17

measure of light sensitivity

Answer 17

lux 1 lux=10cf (candles per foot)

Question 18

ALC

Answer 18

Automatic lens control; output on camera that controls an auto iris control

Question 19

AGC

Answer 19

automatic gain control; electronic feature that automatically increases camera sensitivity under poor lighting conditions

Question 20

BLC

Answer 20

backlight compensation; electronic processing of a video that reduces the rear illumination and increases the brightness of the target, standard or zone selectable

Question 21

voltage for full body or legacy cameras

Answer 21

24V

Question 22

What are the 7 camera types?

Answer 22

full body, bullet, dome, board, vandal, covert, ip network

Question 23

_______ devices are devices that are shared on a network. ex printers and fax machines

Answer 23

peripherals

Question 24

How is an IP address constructed?

Answer 24

network manager deter mains IP address

4 sets of numbers separated by decimal points

Question 25

What is the purpose of the subnet mask?

Answer 25

like an area code, when one computer calls another it needs to know if its local or long distance

Question 26

How are dynamic and static IP addresses different?

Answer 26

static IP address stay the same for remote access where dynamic change every time you lose connection

Question 27

List two types of firewall programs

Answer 27

DHCP (dynamic host configuration protocol)

NAT (network address translation)

Question 28

What communication protocol is used by most computer networks?

Answer 28

TCP/IP (transmission control protocol/internet protocol)

Question 29

What is the process for viewing network video on a computer?

Answer 29

standard web browser (internet explorer) then type in the IP address in the address bar

Question 30

What are two memory types network cameras use to store images locally?

Answer 30

memory card or built in