Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
Name the freq ranges.
|
VLF-3-30kz
LF 30-300 Kz MF 300kz 3-mhz HF 3-30 mhz VHF 30-300 mhz UHF 300 mhz-3 ghz SHF 3-30 ghz EHF 30-300 ghz |
|
|
What is the process of eliminating an undesired portion of a signal?
|
Suppression
|
|
|
Reception is known as what?
|
When an electromagnetic wave passes through a receiver antenna and iduces a voltage in that antenna
|
|
|
What is the separation of low freq from high freq known as?
|
Detection
|
|
|
What is the process of croverting electrical signals into sound waves?
|
Reproduction
|
|
|
Balanced phase detector?
|
A circuit that controls the oscillator Freq.
|
|
|
What is fidelity?
|
The ability to accurately reproduce at its output the signal at its input
|
|
|
What is a transmitter?
|
Generates an rf carrier, modulates it with intelligence, amplifies it, and applies it to an antenna.
|
|
|
What is an antenna coupler?
|
A device used for impedance mataching between an antenna and a transmitter or receiver.
|
|
|
What is a receiver?
|
Receives electromagnetic energy and converst it to a visible or audible form
|
|
|
What is a patch panel used for?
|
To tie a receiver to transmitter to its associated equipment.
|
|
|
What is a passive satellite?
|
One that reflects radio signals back to earth.
|
|
|
What is a active satellite?
|
One that amplifies the received signal and retransmits it back to earth.
|
|
|
What is UP Link?
|
Freq used to transmit signal from earth to a satellite.
|
|
|
What is Down Link?
|
Freq used to transmit signal from statellite to earth.
|
|
|
What is it called when the satellite moves at the same speed as the earth?
|
synchronous orbit
|
|
|
What is it called when a satellite is the closest to the earth?
|
Perigee
|
|
|
What is the greatest distance a satellite is to the earth called?
|
Apogee
|
|
|
What is the angle of inclination?
|
The angular difference between the equatorial plane of the earth and the plane of the orbit of the satellite.
|
|
|
What is a polar orbit?
|
Orbit that has an angle of inclination of or near 90 degrees.
|
|
|
What is a medium altitude orbit?
|
An orbit from 2000 to 12000 miles above the earth.
|
