VHF communications Flashcards
What is VHF Communications?
- It used for Air to Air, and Air to Ground radio communications
- Communications between Air Traffic Control and Aircraft are conducted using VHF Com
VHF Communications are limited to _______ range.
Line of Sight
What is the modulation of VHF Comm?
It is Amplitude Modulated
VHF Comm frequency range is _______.
118-136MHz
Channel spacing of aircraft has evolved from ______.
50 KHZ(360 channels), to 25 KHZ(720 channels), to 8.3 KHZ(2160 channels)
What are the Components of VHF?
- transceiver
- antenna
- frequency selector
- audio input/output devices
What does carrier waves do?
It makes audio travel further.
Smaller aircraft (M1) has will have a panel mounted transceiver. This will contain ______ and ______.
Frequency selector and Audio Controls.
M2 aircraft has two or more VHF Comm. These systems typically have transceivers located in the ______.
E&E Compartment or Electric Equipment Center
Remote mounted frequency selectors are located in the ________.
Cockpit, typically on the center pedestal
VHF antennas has 2 types.
Whip or Blade type
what signal is produced when no input is given
Carrier by itself
What if input is given?
Carrier plus modulation
VHF in international operations may extend to _____ Mhz.
151.975mHz
One advantage of VHF is ______.
signals are not distorted or rendered unintelligible by static and other types of INTERFERENCE.
