What's the frequency Kenneth?
What frequency does glideslope use?
UHF.
What do AM and FM stand for?
Amplitude modulation and frequency modulation.
True or false? The apex of a VOR antenna should face to the rear of the aircraft?
False.
What antenna looks like a tongue?
Glideslope
How is an aircraft antenna grounded?
Through the airframe.
What is RNAV?
Navigation from point A to point B without flying over navigational aids.
What system are glideslope and localizer part of?
Instrument Landing system.
True or false? When an aircraft equipped with a two-way radio is operated outside the US, the radio station license must be displayed?
True.
Can a VOR tell you which direction you are flying?
No.
What do we call the second part of an AM or FM signal?
Carrier frequency.
What is the speed of radio waves?
The speed of light.
What do we call an antenna that has an AC source in the middle and a wire on each side of it? What is a common use for it?
Dipole antenna; VOR
What antenna looks like a handle (but it's not a handle!)
Localizer.
How is a DME antenna positioned?
Aligned with the centerline of the aircraft.
How is it that only the correct aircraft receives the information from the DME?
The signal is coded for a particular aircraft
What's the significance of 3 degrees in instrument landing?
It's the typical slope of the glideslope.
What do these criteria pertain to? Has reached the replacement date or the transmitter has been in use for more than one cumulative hour.
Replacing an ELT battery.
What does DME calculate? Is this measurement alone enough to tell you navigational distance?
It measures distance from the aircraft to the DME station. No, because it is a direct line measurement - you would need to know altitude to also calculate ground or travel distance to the station.
What is the relationship between frequency and wavelength?
What two kinds of fields are radio waves made of?
Electric & Magnetic
What do we call a one-fourth wave antenna that uses the mounting surface of the conductive aircraft skin to create the second one-fourth wavelength to act like a half-wave antenna? What is a common use?
Marconi antenna, VHF
What do we call an antenna formed into a loop – when used as a receiving antenna, highly direction sensitive? What is a common use?
Loop antenna; ADF
Where is a marker beacon antenna mounted?
Bottom of the aircraft.
What does a glideslope do? What does a localizer do?
Glideslope provides vertical guidance "ramp down out of the sky." Localizer provides horizontal guidance to center on the runway.
Describe the basic functioning of a transponder.
It receives an interrogation signal from a ground station and automatically sends a reply back.
What is the significance of first 5 minutes of the hour?
It's when you can test an ELT.
In traffic collision avoidance, what is an RA?
An RA includes the action that should be taken by the pilot.
What are two common uses of UHF?
Very long flights, such as transcontinental, DME.
What frequency is each of the type of wave?
Space=VHF
Sky=HF
Ground=VLF to MF
What makes loop antennas useful for direction finding?
They have maximum reception when the plane of the loop is parallel to the direction of wave travel and when the plane of the loop is perpendicular to the direction of wave travel they have almost no reception, so as the direction of the aircraft turns, the signal changes, indicating direction.
Sense and loop antennas are part of what system?
ADF.
What do radio altimeter and GPS have in common?
They are two systems that can provide altitude independently of other systems.
How does a VOR receiver determine direction to the VOR?
Because of phase shift between the 2 signals transmitted by the VOR
What does this describe? A 30hz AM signal called variable or sweep signal; A 10 hz FM signal called reference signal.
The two modulated frequencies of the VOR signal.
What is the significance of 12 months with regard to a piece radio-enabled emergency equipment?
What additional equipment is needed by the ADS-B system?
Name 3 uses of VHF.
Ground communications, VOR, aircraft to aircraft communications in air, localizer.
What are the main three types of waves, and how do they behave?
Space, Sky, Ground
Line of sight
Bounce off the ionosphere
travel close to the ground
Name at least 3 things to consider when installing an antenna
When installing an antenna what are some things to consider?
Use a gasket or sealant to prevent the entry of moisture.
Ensure the antenna is properly bonded to the aircraft structure
Handle the coaxial cable carefully to avoid damage
Ensure the coaxial cable is fully connected to the antenna
Why is it that in some situations, one antenna can be used for the radio range and standard broadcast bands?
It's because the two ranges are close together.
How is a coaxial cable constructed? What is the purpose of the different parts?
It has a center conductor, an insulating layer, a braided conductor around the insulator of the center conductor, and an outer plastic covering.
The center conductor conducts the signal; the insulation separates signal from ground, the braided conductor shields the signal from emf and shield other devices from the cable’s emf; the plastic covering is protective.
Name at least 3 navigation aids that can indicate the distance an aircraft is above the ground.
Altimeter, radio altimeter, gps, dme, ads-b, transponder
What does GPS need in order to provide latitude and longitude? What does it need in order to provide altitude? What does WAAS do?
It needs to lock into 3 satellites; it needs to lock into 4 satellites. WAAS increases accuracy, from 20 meters to 7.6 meters.
What does GPWS stand for and what systems does it monitor?
Ground Proximity Warning System.
Radio altimeter, air data computer, instrument landing system, and landing gear and flap positions.
What are the two protocols of Automatic Dependent Surveillance system? What is each protocol used for?
ADS-B Out and ADS-B In.
Out is to transmit aircraft information to the FAA.
In is for ATIMs, NOTAMS and AWOS