FM Flashcards
1
Q
What is FM?
A
The method by which the frequency of the carrier has changed in accordance with the amplitude of the modulating wave
2
Q
What’s centre (carrier) frequency?
A
The frequency occupied by the carrier when in an unmodulated state
3
Q
What’s fd?
A
The amount of change in frequency from the centre frequency in the modulated wave
4
Q
What’s frequency swing?
A
The different from the lowest to highest frequency the modulated wave can attain
5
Q
Deviation ratio?
A
Is a ratio of the maximum frequency deviation and the highest modulation frequency fd:fm
6
Q
Modulation index
A
Decimal number representing the ration of the fd and the highest fm
Mi= fd/fm
7
Q
How to calculate transmission bandwidth for FM?
A
Carsons rule 2(fd+fm)
8
Q
Will distortion occur?
A
No
