Indirect fm transmitter

1. What is indirect FM transmitter?
2. What is direct FM and indirect FM?
3. What is the difference between direct and indirect method of FM generation?
4. Which is the indirect way of FM generation?

What is indirect FM transmitter?

In the indirect method of producing frequency modulation, the modulating signal is first integrated and then phase modulates a crystal controlled oscillator signal to produce a narrow-band FM signal. Frequency multiplication is then used to increase the resulting frequency deviation to the desired level.

What is direct FM and indirect FM?

FM signals can be generated using either direct or indirect frequency modulation: Direct FM modulation can be achieved by directly feeding the message into the input of a voltage-controlled oscillator. For indirect FM modulation, the message signal is integrated to generate a phase-modulated signal.

What is the difference between direct and indirect method of FM generation?

Answer: Direct FM For direct FM, the instantaneous frequency is directly varied with the information signal. The carrier frequency is varied using an oscillator where its resonant frequency is determined by variable components. ... Indirect FM As mentioned in the lecture notes, FM and PM are related to one another.

Which is the indirect way of FM generation?

Armstrong method is also known as indirect method to generate FM.