调幅和调频之间的区别

1.调幅：
它是一种调制，其中载波的振幅根据保持相位和频率恒定的调制信号的瞬时振幅而变化。修改载波的幅度以便发送数据或信息。它可以远距离传输，范围大。其调制指数在0到1之间变化。在幅度调制中，频率和相位保持不变。

2.调频：
它是一种调制，其中载波的频率根据调制信号的瞬时幅度而变化，并保持相位和幅度恒定。修改载波频率以发送数据或信息。它不能长距离传输，范围较小。其调制指数始终大于1。在频率调制中，幅度和相位保持不变。

调幅和调频之间的区别：

Amplitude Modulation	Frequency Modulation
In amplitude modulation, the frequency and phase remain the same.	In frequency modulation amplitude and phase remain the same.
Its modulation index varies from 0 to 1.	Its modulation index is always greater than one.
It has only two sidebands.	It has an infinite number of sidebands.
It has simple circuit.	It has complex circuit.
The amplitude of the carrier wave is modified in order to send the data or information.	The frequency of the carrier wave is modified in order to send the data or information.
It requires low bandwidth in the range of 10 kHz.	It requires high bandwidth in the range of 200 kHz.
In AM received signal is of low quality.	In FM received signal is of high quality.
It works in a frequency range of 535 to 1705 Kilohertz (KHz).	It works in a frequency range of 88 to 108 Megahertz (MHz).
It operates in the medium frequency (MF) and high frequency (HF).	It operates in the very high frequency.
It has poor sound quality.	It has better sound quality.