Communication and Navigation Systems Flashcards
Name the basic components of a communication system.
They are a microphone, transmitter, transmitting antenna, receiving antenna, receiver, and a headset or loud-speaker.
What is the most common communication system in use today?
It is the VHF (Very High Frequency) system.
Which radio system is used for long-range communication?
The HF (High Frequency) system.
What is a transceiver?
It is a self-contained transmitter and receiver which share the same power supply, antenna, and tuning.
What are the components of a typical VOR system?
A receiver, a visual indication, antennas, and the power supply.
What are the basic components of an autopilot system?
The gyros, the servos, and the amplifier
What are the sensing ‘elements of an autopilot system?
The directional gyro, turn-and-bank gyro, attitude gyro, and altitude control are the sensing elements. These units sense the movements of the aircraft, and automatically generate signals to keep these movements under control.
What are the output elements of an autopilot system?
The output elements of an autopilot system are the servos that actuate the control surfaces.
What is the purpose of a bonding jumper on a radio shock mount?
To provide a low-impedance ground return and minimize radio interference from static electricity.
What is the frequency of an Emergency Locator Transmitter (ELT)?
It is 121.5 MHz.
How can you determine when the batteries of an ELT should be replaced, even though the set operates?
The useful life of the batteries is determined by the battery manufacturer, and the battery replacement date must be marked on the outside of the transmitter. Time is computed from the date of manufacture of the battery.
Describe the proper method of routing coaxial cable from the antenna to the receiver.
When installing coaxial cable secure the cables firmly along their entire length at intervals of approximately two feet. To assure optimum operation, coaxial cables should not be routed or tied to other wire bundles. When bending coaxial cable, be sure that the bend is at least 10 times the size of the cable diameter.
Where is the preferred location for mounting a VOR antenna on a small aircraft?
The VOR antenna is vee shaped, and the preferred location is on top the forward part of the cabin with the apex of the vee toward the front. An acceptable alternate location is on top the vertical stabilizer.
Where should DME antennas be located?
They should be mounted on the lower surface of the aircraft in a position that will not be blanketed by the wings when the aircraft is banked
What are marker beacons?
Part of the ILS system, and are used to indicate the aircraft position on the approach to the runway.
