Card Set Information
Ame Avionics aircraft
Aircraft maintenance Engineering AME Avionics
What does TCAS stand for?
Traffic collision aviodance system
What modulation type uses a changing frequency on the carrier wave?
What is the drawback of frequency modulation?
HF is what kind kind of waves?
VHF and UHF are what kind of waves?
What are the 2 types of carrier wave fields?
electric and magnetic
What generates the carrier wave?
What adds information to the carrier waves?
What are the 3 types of microphones?
Carbon Dynamic Electret
Antenna coupler does 2 things?
Lightning protection and "Tune and peak"
If the system has no "tune and peak" what tunes the antenna?
The capacitance of the length of Coaxial cable
4 types of antennas?
What frequency type does a straight wire antenna sense?
What does the monopole antenna use for a ground?
the skin of the aircraft
What direction is a dipole antenna mounted?
What system uses crystals to tune in a radio frequency?
What determines the distance antennas are mounted?
the length of the antennas
What sets the sensitivity of VHF?
What kind of antenna does a VHF use?
where are VHF antennas mounted?
Bottom of aircraft
What does SELCAL do?
allows you to talk to one aircraft individually on company frequency without disrupting any others
What system can update the FMS system enroute, by text , and performs trend monitoring?
ADF uses 2 antennas what are they?
Loop and straight wire
what kind of antenna does a VOR use?
Dipole on vert stab
OBS stands for?
Omni Bearing selector
CDI stands for?
course deviation indicator
what is the ADV slaved to?
What affects HF waves
Atmospheric disturbances (weather)
What 2 kinds of radio waves exist in a radio transmitting antenna to cause it to radiate electrical energy?
The higher the frequency, the (longer or shorter) the wavelength.
The frequency of a radio transmission indicates the number of electromagnetic field ______ that occur in ____ second.
radio waves travel at the speed of ______
A______ wave is necessary to transmit radio waves and antennas are usually ______ to _____ the length of the transmitted wave.
carrier , one quarter , one half
Each oscillation is called a ____ and frequency is measured in ____ per second or _____.
There are 2 ways to modulate a carrier wave?
The 3 basic functions of a radio transmitter are:
generate signal at the correct frequency
modulate the signal
amplify the signal
What type of radio waves bounce off the ionosphere and can be used to achieve _____-_____ radio transmission.
sky, long range
The component that generates the carrier wave is called?
A component found in both transmitters and receivers that increases signal strength?
A half wave antenna may also be referred to as a?
Hertz dipole antenna
The metal surrounding the base of a marconi monopole antenna is called?
Aircraft VHF communications antennas are polarized in what direction?
What circuit is used to isolate the desired frequency from all other frequencies picked up by an antenna?
HF radios are most commonly used by large aircraft for (general, oceanic, or continental ) ATC communication
Most civilian aviation radio communication is done in the (uhf or vhf) range
VHF comms are limited to line of sight. true or false
A special VHF/HF communication system for calling a single specific aircraft is known as ?
SATCOM radios operate in the (VHF or UHF) range and can carry both _____ and _____ communication.
UHF , Voice and Data
ACARS is a system for transmitting routine operational, maintenance and administrative messages to airliners via?
digital data link
The 2 antennas required for an ADF are?
ADF is (air or ground) equipment while NDB are (air or ground) equipment
What does ADF stand for?
automatic direction finder
what does NDB stand for?
Non directional beacon
ADF operates in the (LF/MF or VHF/UHF) range
VOR is a (phase or voltage) comparison system
VOR nav radios used for IFR ops must be checked for accuracy every how many days?
DME is or is not a form of pulse equipment?
An RNAV must be tuned to a VOR or VORTAC system to operate normally
GPS is a ground or space based system
Inertial nav systems do or do not require an external radio signal?
INS systems operate by accurately measuring ?