Communication and navigation systems Flashcards
Name the basic components of a communication system
Microphone, transmitter, transmitting antenna, receiving antenna, receiver, and headset or loudspeaker
What is the most common communication system in use today
VHF system
Which radio system is used for long range communication
The HF system
What is a transceiver
It is a self contain transmitter and receiver would share the same power supply, antenna and tuning device
What type of Conductor is used for transmitting information between antennas and receiver transmitters
Coaxial cable
Describe a BNC type connector
It is a connector used with coaxial cable’s that takes 1/4 turn to fully see
What are the components of a typical VOR system
A receiver, visual indicator, dipole antenna, and power supply
What are the basic components of an autopilot system
Gyros, servos, and amplifier
What are the sensing elements of an auto pilot system
Directional Gyro, turn in bank Gyro, attitude Gyro, and altitude control are the sensing elements
These units sense Aircraft pitch, roll, and yaw to automatically generate signals to keep these movements under control
What are the output elements of an autopilot system
The output elements of an auto pilot system or the servos which actuate the control surface
What are three types of servos used in autopilot system
Hydraulic, pneumatic an electric
What is the purpose of bonding jumper on a radio shock mount
To provide a low inpendence ground Return, and minimize radio interference from static electricity
What is the frequency of an emergency locater transmitter
121.5, 243.0, and 406 MHz
How can you determine when the batteries of an ELT should be replaced
The batteries life is determined by the battery manufacture, 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’s secure them firmly along their entire length at intervals of 2 feet. To sure optimum operation, coaxial cables should not be routed or tied to other wire bundles and be as short as possible. When Ben and Qa still cables, be sure that the band is at least 10 times the size of the cable diameter
