Chapter 4- Communications Flashcards
Radio communications are possible because of what?
Electromagnetic waves
What are examples of electromagnetic waves?
Heat wave
Light wave
Radio energy wave
FM radio and TV waves are between what wavelengths?
1-10m
Radio frequency interference is caused by what?
Natural sources
Man made sources
The mixing of two or more radio signals is called what?
Intermodulation interference
Interference caused by nearby high-power radio signals can cause what?
Receiver desensitization
Receiver overload
3 things that can affect radio coverage are:
Terrain
Radio power output
Antenna height
What is the factor that influences radio coverage the most?
Antenna height
What is the term used to describe how far out an antenna will transmit and receive?
Gain
When wearing a portable radio in a chest harness, the best way to ensure optimal radio coverage is to what?
Orient the antenna vertically
Information on radio operating procedures can be found where?
In the FFS radio manual
FFS policy and procedures chapter 412
FFS fire manual chapter 3
FFS intranet site
What is the channel used for aircraft to stay in contact with dispatch?
Flight Following
Channel 150 will be found in what group?
15
In Mobile radios, what channels are reserved for weather channels?
The 30’s
In portable radios, what group is reserved for incident cloning?
Group 25
